Metal Roof Shingle System and Method of Installation

Abstract

A lightweight interlocking metal roof capping system for installation onto a steep or inclined structure roof either directly over the roof decking material or over an existing shingle roofing system, with the metal roofing system installed from the roof ridgeline down to the drip edge of the roof gutter. Cooperating outwardly extending flanges and receiving pockets for capturing and interlocking the metal panels of the roofing system create an interlock between and among panel members with overlying edge ends configured to be resistant to lift up due to winds either across the roof or along the roof edges.

Claims

1. A lightweight interlocking roof capping system that inter-engages a plurality of preformed thermally insulative metal panels to create an integral roof surface over the roof decking or an existing roofing system of a structure having an inclined roof comprising: one or more triangularly shaped roof ridge cap panel members for positioning along a ridgeline of a structure roof each arrayed longitudinally along the roof ridge with the next, each said roof ridge cap panel member having a substantially planar outward facing central surface with a pair of flanges outwardly extending downwardly across the roof from each equal length sides of each of said panel members, each flange arranged at right angles to the other flange, with receiving pockets having a predetermined depth dimensionally sized and adapted for receiving within said pockets upwardly extending cooperating flanges from adjacently placed similarly dimensioned rectangularly shaped roof panel members and interlocking therewith; said rectangular roof panel members having a substantially planar outward facing central surface with equal length sides arrayed on the roof between and a half panel member span below said roof ridge cap panel members or other adjacent roof panel members with a first set of opposite corners one above the other in a vertical line substantially in parallel relationship to the roof edges and a second set of opposite corners in a horizontal line substantially in parallel relationship to the ridgeline or eave edge of the roof, said rectangular roof panel members having flanges outwardly extending downwardly across the roof, along adjacent downward facing sides thereof, with receiving pockets having a predetermined depth dimensionally sized and adapted for receiving within said pockets upwardly extending cooperating flanges from other adjacently placed similarly dimensioned roof panel members and interlocking therewith; said rectangular roof panel members having upper side indents along the entire length of each upper side extending into the planar central surface and an upwardly extending flange having a predetermined length dimensionally sized and adapted for fitting within and frictionally engaging with the cooperating pockets of the adjacent roof panel members; said outwardly extending flanges of the roof ridge cap panel members and the roof panel members extending downwardly along the roof each having a lower extension beyond said pockets for receiving mechanical fasteners for securing said panel members to the roof and an upper extension beyond said pockets for overlying the joint between adjacent panel members a predetermined distance along the upper surface of adjacent roof panel members and overlying the opposing upper side indents in said adjacent panel members; and said substantially planar central surfaces of each said roof ridge cap and rectangular panel members being preformed and dimensioned to provide a downward opening recess for housing a structural foam member for providing both thermal insulation and central support for said panel members creating a substantially uniform continuously integral surface for said roof capping system.

2. The roof capping system of claim 1, wherein said rectangular roof panel members extending over the roof edges may be trimmed to dimensionally match the roof edge and have a roof edge member for extending over and beneath the roof edge to prevent wind uplift along said roof edge.

3. The roof capping system of claim 1, further comprising roof edge panel members having a substantially planar outward facing central surface with equal length sides arrayed on the roof between and a half panel member span below said roof ridge cap panel members or the next higher course of rectangular roof panel members and the rectangular roof panel members and upper side indents along the entire length of the upper side extending into the planar central surface, an upwardly extending flange along the upward facing side thereof having a predetermined length dimensionally sized and adapted for fitting within and frictionally engaging with the cooperating pockets of the adjacent roof panel members, a downwardly extending flange along the downward facing side thereof with a receiving pocket having a predetermined depth dimensionally sized and adapted for receiving within said pockets upwardly extending cooperating flanges from other adjacently placed similarly dimensioned roof panel members and interlocking therewith, a lower extension beyond said pockets for receiving mechanical fasteners for securing said panel members to the roof and an upper extension beyond said pockets for overlying the joint between adjacent panel members a predetermined distance along the upper surface of adjacent roof panel members and overlying the opposing upper side indents in said adjacent panel members.

4. A method for installing a lightweight interlocking roof capping system that inter-engages a plurality of preformed thermally insulated metal panels to create an integral roof surface over the roof decking or an existing roofing system of a structure having an inclined roof comprising the steps of: positioning and aligning a series of triangularly shaped roof ridge cap members along the ridgeline of the structure roof each arrayed longitudinally along the roof ridge with the next and having a substantially planar outward facing central surface with a pair of flanges outwardly extending downwardly across the roof from each equal length side of each said panel members, each flange arranged at right angles to the other flange, with receiving pockets having a predetermined depth dimensionally sized and adapted for receiving within said pockets cooperating flanges from one or more adjacently placed similarly dimensioned rectangularly shaped roof panel members and interlocking therewith; securing each of said series of roof ridge cap panel members to the roof of the structure by mechanical fasteners placed through at least one pair of short flanges extending over the roof ridgeline and through a nailing hem at the distal end of the downwardly extending flanges creating a horizontally aligned first course of panel members; positioning said rectangular roof panel members having a substantially planar outward facing central surface with equal length sides arrayed across the roof between and a half-panel member span below said roof ridge cap panel members, said rectangular roof panel members having flanges outwardly extending downwardly across the roof, along adjacent downward facing sides thereof, with receiving pockets having a predetermined depth dimensionally sized and adapted for receiving cooperating flanges within said pockets upwardly extending cooperating flanges from other adjacently positioned similarly dimensioned roof panel members and interlocking therewith; positioning said one or more roof panel members, in a staggered array of additional courses of panel members extending from the ridgeline downward along the roof, into the pockets of the immediately adjacent roof ridge cap or roof panel member already secured to the roof, said roof panel members having upper side indents along the entire length of each upper side extending into the planar central surface and an upper extension beyond said receiving pockets for overlying the joint between adjacent roof panel members and covering over the flanges and fasteners used to secure the earlier secured courses of panel members to the roof; preforming each said roof ridge cap and said roof panel members to provide a downward opening recess for housing a structural foam member for thermally insulating and supporting each said panel member for creating from the centrally disposed surfaces of each said roof ridge cap and roof panel member a substantially uniform continuously integral surface for said roof capping system.

5. The roof capping installation method of claim 4, comprising the additional steps of trimming roof panel members extending over the roof edges to dimensionally match the roof edge and securing a roof edge member along the trimmed side of said roof edge panel member for extending over and beneath the roof edge to prevent wind uplift along said roof edge.

6. The roof capping installation method of claim 4, forming a cascading downward half step as the staggered roof panel members are interconnected into courses from the ridgeline of the roof to the eave edge allowing water and other run off to move downward over the substantially uniform continuously integral roof surface formed by the inter-engaged plurality of roof ridge cap and roof panel members.

7. The roof capping system of claim 1, further comprising a roof cap member bent to conform to the incline of the roof along a central line extending along its length dimension for fitting over said roof ridge cap panel members and attaching to them along the expanse of the roof ridge.

8. The roof capping system of claim 1, further comprising a roof valley member bent to conform to the incline of the roof along a central line extending along its length dimension for fitting over abutting adjacent roof panel members along an angled joint and attaching to them along the length of said angled joint.

9. The roof capping system of claim 1, further comprising a roof eave member having a substantially planar outward facing central surface with equal length upper sides arrayed on the roof between the next higher course of rectangular roof panel members and along the roof eave edge with upper side indents along the entire length of the upper side extending into the planar central surface, an upwardly extending flange along each upward facing side thereof having a predetermined length dimensionally sized and adapted for fitting within and frictionally engaging with the cooperating pockets of the adjacent roof panel members and interlocking therewith, and a roof edge member for extending over and beneath the roof edge to prevent wind uplift along said roof eave edge.

10. The roof capping installation method of claim 4, further comprising the step of positioning and securing a roof cap member bent to conform to the incline of the roof along a central line extending along its length dimension for fitting over said roof ridge cap panel members and attaching to them along the expanse of the roof ridge.

11. The roof capping installation method of claim 4, further comprising the step of providing a roof valley member bent to conform to the incline of the roof along a central line extending along its length dimension for fitting over abutting adjacent roof panel members along an angled joint and attaching to them along the length of said angled joint.

12. The roof capping installation method of claim 4, further comprising the step of providing a roof eave member having a substantially planar outward facing central surface with equal length upper sides arrayed on the roof between the next higher course of rectangular roof panel members and along the roof eave edge with upper side indents along the entire length of the upper side extending into the planar central surface, an upwardly extending flange along each upward facing side thereof having a predetermined length dimensionally sized and adapted for fitting within and frictionally engaging with the cooperating pockets of the adjacent roof panel members and interlocking therewith, and a roof edge member for extending over and beneath the roof edge to prevent wind uplift along said roof eave edge.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0028] For the purpose of illustrating the invention, there is shown in the drawings forms which are presently preferred; it being understood, however, that the invention is not limited to the precise arrangements and instrumentalities shown.

[0029] FIG. 1 is a perspective view of a residential structure roof showing sections of the formed metal panel roof system of the present invention along the upper roof sections to demonstrate the cascading half-step formed in a downward direction as the roof panels interlock.

[0030] FIG. 2 is an exploded view of several interlocking panel members of the formed metal panel roof system of the present invention with two of the starting panel members along the roof ridge showing the interlocking members of the various panels outward toward one side and to the bottom or eave.

[0031] FIG. 3 is an enlarged plan view of the several panels of the formed metal panel roof system of the present invention as they would be installed and interlocked along the ridge, side and bottom of the roof of the building structure.

[0032] FIG. 4 is a side elevational view of the interlocking joint of adjacent panels of the present invention.

[0033] FIG. 5 is a perspective view of the interior of an inverted roof cap panel to be used in the valley between adjacent upwardly angled roof sections.

[0034] FIG. 6 is a perspective view of the exterior of a roof cap panel to be used along the ridge of the roof or dormer of a structure.

[0035] FIG. 7A is a plan view of a metal panel roof member of the present invention indicating the bends or fold lines for forming the individual panel.

[0036] FIG. 7B is a plan view of a top or ridge metal panel roof member of the present invention indicating the bends or fold lines for forming the individual panel.

[0037] FIG. 7C is a plan view of a bottom edge metal panel roof member of the present invention indicating the bends or fold lines for forming the individual panel.

[0038] FIG. 7D is a plan view of a left edge metal panel roof member of the present invention indicating the bends or fold lines for forming the individual panel.

[0039] FIG. 7E is a plan view of a right edge metal panel roof member of the present invention indicating the bends or fold lines for forming the individual panel.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0040] The following detailed description is of the best presently contemplated mode of carrying out the invention. This description is not intended in a limiting sense, but is made solely for the purpose of illustrating the general principles of the invention. The various features and advantages of the present invention may be more readily understood with reference to the following detailed description, taken in conjunction with the accompanying drawings, wherein like numbers refer to the same feature or part thereof.

[0041] Referring now to FIGS. 1-6, and in particular to FIG. 1, there is shown a formed panel metal roofing system 10 for installation on a pitched roof with interlocking panel members 12 that can be overlaid directly on top of an existing asphalt shingle roof, or directly atop the roof decking, or on top of an additional structural insulative layer if one is requested by the structure owner. Arrayed along the ridge line of the roof are interlocking ridge cap panel members 26 [FIG. 6] that overlay a short distance of each other as they progress along the ridgeline of the roof and along the ridgeline of the dormer section. Also, each of the ridge cap panels 26 overlay the series of partial rectangular roof ridge panel members 12b as the other metal roof panels 12 are arrayed downward from the ridgeline of the roof of the structure, and along the dormer. An inverted gutter panel 26a [FIG. 5] is used along the valley created between two adjacent sections of the roof that are at right angles to each other such as between the main roof decking area and the dormer.

[0042] With reference to FIGS. 2 and 3, each of the interconnecting metal roof panel members 12 has a pair of receiving pockets 14a, 14b shown along the downward facing sides or bottom edges of the panel members. Each of the receiving pockets 14a, 14b has an underside extending flange 16, 18 used as a nailing hem for supporting a cooperating outwardly extending engaging flange 20a, 20b from an adjacent panel 12. Along the left side of the roof a side edge panel 12d, at the left of FIG. 2, has a folded edge 22d for hooking over the existing roof decking material and creating a flashing along the side edges of the roof structure. The folded edge 22d is secured by fasteners to the outer structural member of the roof decking, sometimes called the barge board, overlapping any other fascia that may have been attached to protect the soffit under an eave.

[0043] The exploded view in FIG. 2 shows how an array of panels 12 can be fit together such that the panels create an overlapping effect as they are placed across and downward along the roof. More specifically, the interlocking arrangement of panels and the creation of a planar outer surface can be better viewed with reference to the plan view of FIG. 3. Each of the metal roof panels 12 has first and second upper sides with each side having an extending flange 20a, 20b. Further, each panel 12 has two lower sides with each having a receiving pocket 14a, 14b for engaging and interlocking with the respective extending flanges 20a, 20b of adjacent panels. Referring to FIG. 2, the central panel 12 has an upward extending flange 20a along its upper right side that will engage the edge receiving pocket 14a in the panel 12 to the upper right. The central panel 12 also has an upward extending flange 20b along its upper left side that will engage the edge receiving pocket 14b in the panel 12 to the upper left. The reference central panel 12 also has a downward extending nailing hem 16 and receiving pocket 14a along its lower left side for engaging the flange 20a from the panel 12 to the lower left. The central panel 12 also has a downward extending nailing hem 18 and receiving pocket 14b along its lower right side for engaging the flange 20b from the panel 12 to the lower right. Each of the various panels 12 has the same elements in the same positions as described for the central panel 12.

[0044] Moving down one-half course in FIG. 2, and assuming that the panels 12 to the lower left and right of the central panel 12 are joined and interlocked with the central panel 12, bottom edge panel 12c can be joined to the existing interlocked group of panels 12. Bottom edge roof panel 12c that is shaped in the form of an isosceles triangle to match the length of the sides of the panels 12 has the same elements as the central panel 12 extending upward along each of its two upper sides with each side having an extending flange 20a, 20b. Each of these flanges will respectively be insertable into and interlock with the respective receiving pockets 14a and 14b of the panels 12 to the upper right and left of bottom edge panel 12c. Bottom edge panel 12c also has an extended folded edge 22c for hooking over the existing bottom edge of the roof decking material and creating a flashing along the bottom edge of the roof structure. The folded edge 22c is secured by fasteners to the outer structural member of the roof decking, sometimes called the fascia board, overlapping any other fascia that may have been attached to protect the soffit under the eave.

[0045] Moving to the left side of FIG. 2, there is shown a left edge roof panel 12d, that is shaped in the form of an isosceles triangle to match the dimensions and shape of the sides of the panels 12, has the same elements as the central panel 12 with a flange 20a extending upward from its upper right side and a receiving pocket 14b and nailing hem 18 extending downward from its lower right side. The flange 20a will engage and interlock with the receiving pocket 14a of the panel 12 to the upper right and the receiving pocket 14b will provide for interlocking with a panel 12 (not shown) to the lower right. Along the outer edge of left edge panel 12d is the folded edge 22d for hooking over the existing roof decking material and creating a flashing along the side edges of the roof structure as described above.

[0046] Along the ridge line of the roof a series of roof ridge panels 12b are arrayed that are also shaped in the form of isosceles triangles to match the dimensions and shape of the sides of the panels 12. Each of the ridge roof panels 12b has the same elements as the central panel 12 with a receiving pocket 14a and nailing hem 16 extending downward from its lower left side and a receiving pocket 14b and nailing hem 18 extending downward from its lower right side. The receiving pocket 14a will engage with and interlock the flange 20a from the panel 12 to the lower left of the ridge roof panel 12b and the receiving pocket 14b will do the same with the flange 20b from the panel 12 to the lower left of the panel 12b. Ridge roof panel 12b also has a pair of nailing tabs 22b that extend over the ridge line of the roof decking material and provide an anchoring point for the ridge roof panel 12b. The tabs 22b are positioned such that the tabs 22b of opposing roof ridge panels 12b will not overlap and can be accessed by lifting one panel 12b to secure the opposing panel 22b in position on the roof. Any fastener, nails, screws or staples, can be used to affix the ridge roof panel tabs 22b to the roof decking material, or to whatever material is being used as an underlayment.

[0047] Referring to FIG. 4, two adjacent metal roof panels 12 are shown in an exploded side elevational view to describe the interlocking fit between adjacent panels. The left panel 12 has a rightward opening receiving pocket 14b with a nailing hem 18 extending beyond the pocket to the right along the bottom of the panel 12. The metal skin of the panel 12 is shown traversing across the top of the panel, then extending outward to the right a predetermined distance, then folded back underneath the top facing skin, and then folded outward again to form the receiving pocket 14b with the nailing hem 18 along the bottom extension to the right. The extended flange 18 is used as a nailing hem and a roofing nail 19 is shown passing through the flange 18. To the right is another panel 12 having a leftward facing outwardly extending flange 20b for fitting into and interlocking with the receiving pocket 14b of the left panel 12. The flange 20b of the right panel 12 extends outward to the left (as shown) and will lie on top of and be positioned to slide against the nailing hem or flange 18 and into the receiving pocket 14b and over the mechanical fastening means 19, i.e., roofing nail, screw or staple, to form the interlock between the right and left panels 12. The metal skin of the right panel 12 is shown traversing across the top of the panel, then depressed downward slightly forming a depression or detent 21 to begin the extended flange 20b. The detent 21 is dimensioned to have a depth equivalent to the folded over depth dimension of the upper portion of the opposing receiving pocket 14b of the adjacent panel 12 and to accommodate that upper portion of the opposing receiving pocket 14b into the detent 21 so that the surface of the joined panels 12, 12 are flat and level forming a substantially continuous surface when joined together. The metal skin of the right panel 12 is then folded back underneath the upper portion of the flange to form a double thickness ending at the point where the detent 21 begins. This formed flange 20b is then capable of frictional engagement with the pocket 14b of the adjacent panel 12 with the flange 20b overlying the nailing hem 18 of the adjacent panel 12.

[0048] Between the inner sides of the receiving pocket 14b and the detent 21 for the flange 20b, as well as the other receiving pocket 14a and the detent 21 for the flange 20a, a recess is formed that houses the structural thermal/sound insulation 24. The structural insulation 24 is tightly fit within the recess and held in place either by frictional contact along its edges or by an adhesive placed across the underside of the metal skin within the recess so that the insulation 24 is captured by and remains within the recess.

[0049] Each of the cooperating flanges 20a, 20b and receiving pockets 14a, 14b of immediately adjacent panels 12 are dimensioned to be able to tightly fit into and frictionally engage each other such that the receiving pockets 14a, 14b have an approximate separation dimension of approximately 0.140 inches, which is nominally the thickness of the projecting flanges 20a, 20b having an approximate thickness of 0.125 inches, with a pocket depth ranging between 1 and 2 inches. The proportionality of the separation dimension of the receiving pockets 14a, 14b is intended to be slightly more than twice the thickness of the metal skin of the metal roof panels in view of the folding or doubling over of the metal skin to form the flanges 20a, 20b. Thus, the separation dimension of the receiving pockets will be slightly more than twice the thickness of the metal skin regardless of the actual thickness utilized for the metal roof panels 12. The penetration of the flanges 20a, 20b into the receiving pockets 14a, 14b is substantially the same distance as the overlay of the upper portion of the receiving pockets 14a, 14b over the respective detents 21 in the adjacent panels 12. The detents 21 are formed with a dimensional height difference from the upper surface of the panels 12 of just slightly more than twice the thickness of the metal skin of the panel, e.g., 0.140 inches. In this manner the overlay and depth of insertion between the cooperating structures of each panel 12 create an integral joint between adjacent panels 12. See, FIG. 4.

[0050] The outwardly extending flanges 20a, 20b of the two panels 12 of FIG. 2 immediately adjacent to and below the roof ridge panels 12b are also capable of fitting within the opposing cooperating formed pockets 14a, 14b along the bottom edge of adjacent roof ridge panels 12b. Overlying each opposing ridge panel 12b positioned on either side of the roof ridge line is a ridge cap panel 26. See, FIGS. 1, 6. The ridge cap panel 26 has a bend along the entire length of its centerline to fold over and fit snugly against the roof ridge panels 12b positioned along the ridgeline of the steep or inclined roof. Each side edge of the ridge cap panel 26 is held in place by a fastener that extends through the ridge roof panel 12b and/or the roof panel 12 and into the underlayment or decking material to hold the cap 26 in place. Each roof cap panel 26 slightly overlaps the adjacent roof cap panel 26 so that there is an overlapping joint formed preventing water penetration of the joint. At the end of the roof, the ridge cap panels 26 may be configured to overlap the roof and fascia by including a bent end section, like 22 of the panels 12, that overlies the roof edge as described above to hold down the roofing panels and prevent wind lift and water seepage. The ridge cap panels 26 extend along the ridgeline of the structure roof, and may also be utilized to extend along the ridgeline of a dormer section of a roof as also shown in FIG. 1.

[0051] The ridge cap member 26 is invertible to form a gutter or valley member 26a that is positioned between flat sections of the roof that extend away from each other at 45 or greater angles to collect and channel downward runoff water from the adjacent roof sections. See, FIG. 5. The valley member 26a is usually placed along an angled joint between adjacent inclined roof sections to collect and direct runoff water down the valley between the roof sections and to the roof gutter of the structure. As shown in FIG. 1, the valley member 26a overlies the adjacent roof panels 12 and is held in place by a fastener that extends through the roof panels 12 along both sides of the valley and into the underlayment or decking material to hold the valley member 26a in place. In this manner, the valley member 26a, in conjunction with the roof panels 12, form a substantially flat surface such the runoff water continues downward without impediment or having to overcome a rise in the outer surface of the panels 26, 12, or 26a of the metal roofing system 10.

[0052] As described above, the roof panel member 12 has a first straight flat outwardly projecting flange member 20a that extends along almost one entire upward facing side of the panel and a second adjacent straight flat outwardly projecting flange member 20b, which extends along almost the entire other upward facing side of the panel 12. The outwardly projecting flange members 20a, 20b are arranged to interlock seamlessly and to overlay with one or more adjacent panels 12 by sliding into the opposing receiving pockets 14a, 14b of an adjacent panel 12, forming an interlocking metal roof system for a structure as shown in FIGS. 1. Each receiving pocket 14a, 14b is dimensioned to about 1-2 inches in depth and about 9/64 of vertical height. The interstitial space formed within the receiving pockets 14a, 14b is nominally the thickness of the projecting flange members 20a, 20b that extend into the receiving pockets 14a, 14b when the panels 12, 12b, 12c and 12d are interlocked together. Upon interlocking, the various panels, 12, 12b, 12c and 12d, form a substantially uniform, continuous flat surface that is strong enough to walk on.

[0053] Each of the metal roofing panel members 12, 12b, 12c and 12d are dimensioned to be perfectly rectilinear so that when butted together each panel precisely fits into the other when interlocked. In this manner the connection points and fastening means are hidden from view as shown with the assembled and interlocked panel members 12, and 12b, 12c and 12d, in FIG. 3. The raised surface areas of the panels 12, as they are interlocked together, and 26, 26a as they are affixed atop the panels 12, form a substantially uniform surface that allows water and other run off to move downward over the metal panel roofing system 10 and prevent the water from collecting on or penetrating through the roof.

[0054] The first installed member of the roofing system is the ridge panel 12b, shown in FIGS. 1, 2 and 3. These roof ridge panels 12b are set along the length and on both sides of the roof ridge line and secured in place using the tabs 22b along with fasteners 19 inserted through the nailing hem 18 along the downward facing sides of the roof ridge panels 12b. Next the upward facing flanges 20a, 20b of the first half-course of panels 12 are inserted into the receiving pockets 14a, 14b in each of the roof ridge panels 12b arrayed along one inclined slope of the roof and the panels 12 are secured in place by fasteners 19 through their respective nailing hems 18. With the first half-course of panels 12 in place, the roof cap 26 can be placed atop the ridge line and secured in place as shown in FIG. 1. This part of the metal roofing system may be the same or the preferred larger dimensional length than the standard roof panels 12. The ridge cap member 26 is bent or folded along its centerline at an adjustable angle to fit snugly over the roof ridgeline or the top edge of a dormer located on the structure. The bend is not preset and is intended to be flexible to accommodate inclined or steep roofs of different pitches. The ridge cap 26 overlays a portion of the roof ridge panels 12b and the standard panels 12 and is secured in place by fasteners inserted through the panels 12, 12b to any rigid underlayment. In this manner, an impenetrable interlock is created between the ridge cap member 26 and one or more roof panel members 12, 12b depending upon the amount of lateral offset between the panels.

[0055] The step of inserting roof panels 12 is repeated each half-course as described above. At the roof edges, right and left side roof panels 12d are used to meet the roof edge. The upward facing flanges 20a or 20b are inserted into receiving pockets 14a, 14b, respectively, of the adjacent panels 12 and the panels 12d are secured in place through their nailing hems 18 with fasteners 19. After each course of panels 12 is mounted to the roof, another side roof panel 12d is placed and secured in position. The overhanging fascia flange 22d may be secured at the time of installing the roof edge panel 12d, or at a later time when finishing the roof edges.

[0056] When the bottom of the roof is reached, bottom edge panel 12c is used to finish off the metal roof system 10 by inserting the upward facing flanges 20a, 20b into the respective receiving pockets 14a, 14b of the adjacent panels 12. The bottom edge 22c of the bottom edge panel 12c is extended over the roof edge and over the fascia below and secured in place by fasteners. In this manner the newly installed roof panels are positioned and fastened in place without having to walk over already installed panels to reach the next panels to install. Further, the metal roof panel system 10, as installed in accordance with the invention, creates a thermally insulative, sound deadening, self-sealing, non-visible interlocking system of formed sheet metal shingles that provide substantially watertight seams between adjacent shingles without the need for additional sealant materials.

[0057] The present invention provides for the installing of the metal roofing system 10 beginning at the ridgeline of the roof and working downward, rather than starting at the bottom of the roof and working upward. This enables the installer to lay down metal roof panels without having to walk over already installed panels, or to create elaborate systems to prevent damage to the already installed new roofing system. Further, the new roof surface is not traversed by the installer prior to completion allowing for more intact overlying joints between panels.

[0058] Referring now to FIGS. 7A-7E, there are shown a series of blanks that are formable into the several panels 12 and 12b-12d to form each of the formed panels of the metal roof system 10 of the present invention. The sheet metal blanks are not shown with specific dimensions as the dimensions may vary due to roof size which, in turn, will vary the dimensions of the metal shingles. Further, the fold lines shown on the sheet metal blanks are only approximate placements as the size and precise location of a fold will depend upon the thickness of the metal sheet and the dimensions of the receiving pockets and extending flanges. FIG. 7A shows (in dashed lines) the several fold lines in the metal blank to create the panel 12. In the orientation shown, the two upward facing sides of the panel 12 are folded along lines 32 to form the downward detent 21 in the outer surface of panel 12. To form the upward extending flanges 20a, 20b, the blank is folded over itself along lines 33. On the opposite two sides, the sides facing downward, the extending parts of the blank are folded inward and downward along lines 34 to begin the formation of the receiving pockets 14a, 14b. Then the two extending parts of the blank are folded again along lines 35a and 35b to form the pockets with the proper separation and extend outward completing the receiving pockets 14a, 14b and creating the nailing hems 16, 18. In this way the top surface of the receiving pockets 14a, 14b overlies the adjacent detent 21 in the top surface along the extending flanges 20a, 20b with the point 36 between the downward facing sides of the panel 12 overlying the detents 21 at the junction among up to four panels over the course of installation on an inclined roof.

[0059] FIG. 7B shows (in dashed lines) the fold lines to create the panel 12b. In the orientation shown, the tabs 22b along the upward facing side of the panel 12b are formed by folding downward along lines 42 and then outward along lines 43. On the sides facing downward, the extending parts of the blank are folded inward and downward along lines 44 to begin the formation of the receiving pockets 14a, 14b. Then the two extending parts of the blank are folded again along lines 45a and 45b to form the pockets with the proper separation and to extend outward completing the receiving pockets 14a, 14b and creating the nailing hems 16, 18. In this way the top surface of the receiving pockets 14a, 14b overlies the adjacent detent 21 in the top surface along the extending flanges 20a, 20b with the point 46 between the downward facing sides of the panel 12b overlying the detents 21 at the junction among three panels.

[0060] FIG. 7C shows (in dashed lines) the fold lines to create the panel 12c. In the orientation shown, the two upward facing sides of the panel 12c are folded along lines 52 to form a downward detent in the outer surface of panel 12c. To form the upward extending flanges 20a, 20b, the blank is folded over itself along lines 53. Along the bottom of the blank the extension is folded downward along line 56a to form one wall of the recess holding the insulating member 24 and along line 56b to create the fascia covering as described above. This covering extends across the entire bottom side of the panel 12c and abuts against same fascia covering extension of adjacent panels 12c.

[0061] FIGS. 7D, 7E show (in dashed lines) the fold lines to create the left and right side roof panels 12d and 12d, respectively. Referring to FIG. 7D, in the orientation shown, the upward facing side of panel 12d is folded in similar fashion to that of panel 12. To form the upward extending flange 20a, the upward facing side of the panel 12d is folded along line 62 to form a downward detent in the outer surface of panel 12d and then folded over itself along line 63. On the opposite side, the side facing downward, the extending part of the blank is folded inward and downward along line 64 to begin the formation of the receiving pocket 14b. Then the extending part of the blank is folded again along line 65a and 65b to form the pockets with the proper separation and to extend outward completing the receiving pocket 14b and creating the nailing hem 18. On the long side of the panel 12d, the blank is folded along line 66a to form one wall of the recess holding the insulating member 24 and along line 66b to create the fascia covering that overlies the side of the roof decking and connects to the fascia below. The fascia covering extends along the entire side of the panel 12d and abuts against same fascia covering extension of adjacent panels 12d along the entire length of the roof side.

[0062] Referring now to FIG. 7E, in the orientation shown, the upward facing side of panel 12d is folded in similar fashion to that of panel 12. To form the upward extending flange 20b, the upward facing side of the panel 12d is folded along line 72 to form a downward detent in the outer surface of panel 12d and then folded over itself along line 73. On the opposite side, the side facing downward, the extending part of the blank is folded inward and downward along line 74 to begin the formation of the receiving pocket 14a. Then the extending part of the blank is folded again along line 75a and 75b to form the pockets with the proper separation and to extend outward completing the receiving pocket 14a and creating the nailing hem 16. On the long side of the panel 12d, the blank is folded along line 76a to form one wall of the recess holding the insulating member 24 and along line 76b to create the fascia covering that overlies the side of the roof decking and connects to the fascia below. The fascia covering extends along the entire side of the panel 12d and abuts against the same fascia covering extension of adjacent panels 12d along the entire length of the roof side.

[0063] The structural foam insulation 24 that is placed within the formed downward facing opening or recess of the various panels 12 and 12b-12d can be any one of a number of materials. The structural insulative material can be manufactured from molded expanded polystyrene (EPS), extruded polystyrene (XPS), urethane foam, or isocyanate foam. All of these materials exhibit a similar structural non-compression property and serve as insulative materials captive within the downward facing pocket of the panels 12 and 12b-12d installed on the roof. The materials are light weight, but once formed, resist compression sufficiently to prevent the roof panels 12 and 12b-12d from bending inward toward the roof decking when walked on. The insulative factor in R-value can only be approximated at about R5-R10 and will depend upon the density of the foam insulative material. The foam density is preferred to be greater, on the order of 1.5-2.0 lb/ft.sup.3, in order to both provide the structural integrity, as well as adding to the insulative value of the roofing materials. The increased density permits for less temperature transmission through the roofing material in both cold and hot environments. Further, the increased density of the foam also decreases water vapor permeance through the materials virtually eliminating leaks through the insulative material in the roof panels 12 and 12b-12d. In addition, the density will also deaden or reduce sound transmission through the panels 12 and the roof decking materials.

[0064] The lightweight metal roof capping system 10 may be installed over the roof decking materials, or over a pre-existing shingle roof system, for roofs that are considered steep or inclined. An installer may also enclose an interposed layer of closed cell insulation, which insulation layer and rigid backing material may be placed onto and secured to the roof before installing the interconnecting roof panels 12 and 12b-12d to create a higher rated insulation barrier. In all instances the metal roofing system 10 is installed from the ridgeline of the roof downward with the roof ridge panels 12b and the roof cap members 26 being installed first and the panels 12 and 12c, 12d and 12d being installed in an increasing downward direction away from the roof ridge. In this fashion, an installer is neither required to construct a complex support system to create a barrier between the installer, the support system and the metal roofing materials in order not to damage these materials. Since present shingle systems are installed from the roof gutter upwards to the roof ridgeline, an installer has to work over and on top of newly installed shingles giving rise to the potential for damage to the newly installed roof.

[0065] Without having to retrace one's steps by overlying the newly installed roof, by working from the top down, an installer saves time and labor costs and will not place the newly installed roofing system in position for potential damage by the workmen installing the roof.

[0066] Those skilled in the art may perceive improvements, changes and modifications in the invention, all of which are intended to be covered by and included within the scope of the claims set forth herein, and that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense. The present invention may also be embodied in other specific forms without departing from the spirit or essential attributes thereof and, accordingly, the described embodiments are to be considered in all respects as being illustrative and not restrictive, with the scope of the invention being indicated by the appended claims, rather than the foregoing detailed description, as indicating the scope of the invention, as well as all modifications which may fall within a range of equivalency which are also intended to be embraced therein.