WEEP SCREED

Abstract

A method of applying a veneer exterior wall system, the method having the steps of attaching a weep screed substantially horizontally on a wall at a location where a veneer has a termination edge; attaching a weather barrier layer over an outward side of the wall, the weather barrier extending downward and terminating at the upper flange; attaching a drainage mat over on an outward side of the weather barrier, the drainage mat extending downward and terminating at the upper flange, wherein the apertures are directly below at least a portion of the drainage mat; attaching a mesh over on an outward side of the drainage mat, the mesh extending downward and terminating at the upper flange; and applying at least one coat of plaster over the mesh, the coat of plaster extending downward and terminating at the upper flange.

Claims

1. A method of applying a veneer exterior wall system, comprising: (a) attaching a weep screed substantially horizontally on a wall at a location where a veneer has a termination edge, the weep screed comprising: an elongate substantially planar back flange having an outward side and an opposite inward side, and further having a top edge and a lower edge; an elongate upper flange extending outwardly from said outward side of said back flange spaced from said top edge and having an outer edge; an elongate front flange extending upwardly from said upper flange spaced from said back flange, said front flange having an upper edge, and said upper flange forming at least one channel between said front flange and said back flange; a plurality of apertures in said upper flange through which water can drain, said plurality of apertures being spaced from one another and disposed adjacent said back flange; and an elongate bottom flange section extending outwardly from said back flange below said upper flange, said bottom flange section having an upper member extending outwardly and downwardly from said back flange and further includes an outer edge spaced from said back flange; (b) attaching a weather barrier layer over an outward side of said wall, said weather barrier extending downward and terminating at said upper flange; (c) attaching a drainage mat over on an outward side of said weather barrier, said drainage mat extending downward and terminating at said upper flange, wherein said apertures are directly below at least a portion of said drainage mat; (d) attaching a mesh over on an outward side of said drainage mat, said mesh extending downward and terminating at said upper flange; and (e) applying at least one coat of plaster over the mesh, said coat of plaster extending downward and terminating at said upper flange.

2. A method of applying a veneer exterior wall system, comprising: (a) attaching a weep screed substantially horizontally on a wall at a location where a veneer has a termination edge, the weep screed comprising: an elongate substantially planar back flange having an outward side and an opposite inward side, and further having a top edge and a lower edge; an elongate upper flange extending outwardly from said outward side of said back flange spaced from said top edge and having an outer edge, wherein said upper flange comprises an inner section and an outer section separated by a divider wall, said inner section extending outwardly from said outward side of said back flange and includes said plurality of apertures and said outer section extending outwardly from said divider wall and includes said outer edge of said upper flange, and wherein said front flange extends upwardly from said outer section; an elongate front flange extending upwardly from said upper flange spaced from said back flange, said front flange having an upper edge, and said upper flange forming at least one channel between said front flange and said back flange; a plurality of apertures in said upper flange through which water can drain, said plurality of apertures being spaced from one another and disposed adjacent said back flange; and an elongate bottom flange section extending outwardly from said back flange below said upper flange, said bottom flange section having an upper member extending outwardly and downwardly from said back flange and further includes an outer edge spaced from said back flange, (b) attaching a weather barrier layer over an outward side of said wall, said weather barrier extending downward and terminating at said inner section of said upper flange; (c) attaching a drainage mat over on an outward side of said weather barrier, said drainage mat extending downward and terminating at said inner section of said upper flange, wherein said apertures are directly below at least a portion of said drainage mat; (d) attaching a mesh over on an outward side of said drainage mat, said mesh extending downward and terminating at said outer section of said upper flange; and (e) applying at least one coat of plaster over the mesh, said coat of plaster extending downward and terminating at said outer section of said upper flange.

3. A method of applying a veneer exterior wall system, comprising: (a) attaching a weep screed substantially horizontally on the a wall at a location where a veneer has a termination edge, the weep screed comprising: an elongate substantially planar back flange having an outward side and an opposite inward side, and further having a top edge and a lower edge; an elongate upper flange extending outwardly from said outward side of said back flange spaced from said top edge and having an outer edge; a plurality of apertures in said upper flange through which water can drain, said plurality of apertures being spaced from one another and disposed adjacent said back flange; and an elongate bottom flange section extending outwardly from said back flange below said upper flange, said bottom flange section having an upper member extending outwardly and downwardly from said back flange and further includes an outer edge spaced from said back flange; (b) attaching a weather barrier layer over an outward side of said wall, said weather barrier extending downward and terminating at said upper flange; (c) attaching a drainage mat over on an outward side of said weather barrier, said drainage mat extending downward and terminating at said upper flange, wherein said apertures are directly below at least a portion of said drainage mat; (d) attaching a mesh over on an outward side of said drainage mat, said mesh extending downward and terminating at said upper flange; and (e) applying at least one coat of plaster over the mesh, said coat of plaster extending downward and terminating at said upper flange.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following detailed description will be better understood when read in conjunction with the figures appended hereto. For illustrating the invention, there is shown in the drawings preferred embodiments of the present invention. It is understood, however, that this invention is not limited to these embodiments or the precise arrangements shown.

[0015] FIG. 1 is a perspective view of the weep screed in accordance with the present invention;

[0016] FIG. 2 is a front view of the weep screed shown in FIG. 1;

[0017] FIG. 3 is a top view of the weep screed shown in FIG. 1;

[0018] FIG. 4 is a back view of the weep screed shown in FIG. 1;

[0019] FIG. 5 is a bottom view of the weep screed shown in FIG. 1;

[0020] FIG. 6 is a cross sectional view of the weep screed shown in FIG. 1 used with a stucco veneer system on the side of a building;

[0021] FIG. 7 is a perspective view of a stucco system on the side of a building showing the various layers partially removed and using the weep screed shown in FIG. 1;

[0022] FIG. 8 is a perspective view of a second embodiment of a weep screed in accordance with the present invention;

[0023] FIG. 9 is a cross sectional view of the weep screed shown in FIG. 8;

[0024] FIG. 10 is a perspective view of third embodiment of a weep screed in accordance with the present invention; and

[0025] FIG. 11 is a cross sectional view of the weep screed shown in FIG. 10.

DETAILED DESCRIPTION

[0026] With initial reference to FIGS. 1 through 6, a weep screed 10 in accordance with a preferred embodiment of the present invention is now described. This embodiment is preferred for stucco veneer applications although it is useable for other veneer exterior finish applications as well.

[0027] The weep screed 10 forms generally an elongate construction article that has a vertical height H and extends longitudinally a horizontal length L of any desired lengths as preferred in the construction industry (see FIG. 2). Regardless of its initial length L, the weep screed 10 can be cut to the desired length L for the particular application. For orientation purposes in describing the illustrated embodiments, and without limiting the invention, the term inward means a direction facing or extending towards the building wall to which the weep screed 10 is attached (leftward in FIGS. 1, 6 and 7); the term outward means a direction opposite of inward or facing or extending away from the building wall to which the weep screed 10 is attached (rightward in FIGS. 1, 6 and 7). The term upward means a direction facing or extending upwards in FIGS. 1, 6 and 7; the term downward means a direction opposite of upward or facing or extending downward in FIGS. 1, 6 and 7. The terms horizontal and vertical have their ordinary and customary meaning, e.g., the term horizontal means extending in the same direction as the length L in FIG. 2, and vertical means at right angles to the horizontal, which includes the direction of the height H.

[0028] Returning to FIGS. 1 through 6, the weep screed 10 includes an elongate substantially planar vertical back flange 12, which has an outward facing side 14 and an opposite inward facing side 16 (FIG. 3). The back flange 12 has a top edge 18, which in the illustrated embodiment, also defines the top edge of the weep screed 10. The back flange further has a lower edge 20, which in the illustrated embodiment, does not define the bottom edge of the weep screed 10. A nail line 22 may be provided as a guide for the application of nails or other attachment means, and can be provided in any suitable form, including a score formed in the material of the back flange 12 as shown, or by print.

[0029] Extending outwardly from the outward side 14 of the back flange 12 at a substantially right angle thereto is an elongate upper flange 24. The upper flange has an upper side 26 and an opposite lower side 28. As seen, the upper flange 14 is attached to and extends outwardly from the back flange 12 at a position spaced from the top edge 18 to provide sufficient height to receive the various building materials which terminate at or above the upper flange (see FIGS. 6 and 7).

[0030] An elongate front flange 30 extends upwardly from the upper flange 24 at a substantially right angle thereto spaced from the back flange. In the illustrated embodiment, the front flange 30 extends from the outward edge 24a of the upper flange 24, forming a sideways J-like structure as shown. As seen, the upper flange 24 forms a channel 32 between the back flange 12 and front flange 30. The width of the channel W1 (FIG. 3), i.e., the distance from the back flange 12 to the front flange 30, is chosen for receiving the various construction layers therewithin as further described below and can be sized for the specific use. The front flange 30 defines a substantially flat and vertical outward facing side 30a and further has an upper edge 30b which, in the illustrated embodiment, includes a lip 34 extending a short distance inwardly as shown.

[0031] A plurality of apertures 38 are provided in the upper flange 24 through which water can drain. The apertures 38 are preferably spaced from one another and disposed adjacent the back flange 12, preferably immediately adjacent to the back flange, i.e., directly along the back flange, or very close thereto. As discussed below, it is preferable to locate the apertures 38 directly below the drainage mat used in the veneer system to allow water draining through the drainage mat to drain and exit the apertures 38. The apertures 38 can take any suitable form and size, including round and elongated openings, and in one preferable form, are rectangular shaped openings disposed immediately adjacent the back flange 12 as shown.

[0032] It is believed that the placement and configuration of the apertures 38 is important for ensuring proper water drainage and management. The apertures 38 should be located to cooperate with the drainage mat that will terminate and sit within the upper flange 24 of the weep screed 10 through which the water drains from the veneer system. Thus, the apertures 38 should preferably be positioned to be directly below the drainage mat, and of a suitable size and configuration to handle satisfactorily the water without plugging due to dirt and other potential obstacles. In prior art weep screeds, apertures, when provided, tend to be small round holes located so as not to be below the drainage mat, but in many cases are positioned below the plaster layers, thereby interfering with the water drainage. The rectangular configuration shown for the plurality of apertures 38 in FIG. 1, about 1 inch length by 3/16 inch width, spaced from one another by about 3 inches from center to center of each aperture, and each located immediately adjacent the back flange 12 or otherwise to be directly below the drainage mat, is a currently preferred configuration for current veneer systems as further described below. Round apertures of about inches diameter spaced about 2 inches apart diameter to diameter positioned immediately adjacent the back flange 12, or otherwise to be directly below the rain screen is also believed suitable, although other configurations and distances between openings can be used. With current construction, the spacing of the apertures 38 from the back flange 12 to the closest edge of the apertures 38 is preferably no greater than about inch (about inch or less), and in another form no greater than about 3/16 inch (about 3/16 inch or less), and in yet another form no greater than about 1/16 inch (about 1/16 inch or less), all ranges including down to 0 inches.

[0033] With continued specific reference to FIGS. 1 and 6, along the lower portion of the weep screed 10 is an elongate bottom flange section 40 extending outwardly from the back flange 12 below the upper flange 24. The bottom flange section 40 has an upper elongate member 42 extending outwardly and downwardly from the back flange 12 as shown and further includes an outer edge 44 spaced from the back flange 12. In this illustrated embodiment, the upper flange 24 extends from the back flange 12 spaced a distance S above the lower edge 20 of the back flange 12, and the bottom flange section 40 extends outwardly from a position along the back flange 12 spaced below from where the upper flange 24 extends from the back flange 12, here extending from the lower edge 20. It is appreciated that this spacing S, from where the upper flange 24 and back flange section 40 extend from the back flange 12, depending on the configuration, can range from no space (0 inches) between the two to a fairly large space, the space S being about inches in the illustrated embodiment. The upper member 42 is preferably angled downward, forming an obtuse angle relative to the back flange 12 greater than about 91 degrees, more preferably any angle within a range of about 92 to 110 degrees, even more preferably between about 92 to 105 degrees, and more preferably about 100 degrees as used in the illustrated embodiment.

[0034] In the illustrated embodiment, the bottom flange section 40 further includes a lower elongate member 46 extending inwardly and downwardly from the upper member 42 from a location spaced outwardly from the back flange 12, preferably at an acute angle with respect to the upper member 42 so as to form a cavity 48 between the two. A bottom elongate lip 50 extending downwardly from the lower member 46 defines an edge 52, which also defines the bottom edge 54 of the weep screed 10. The edge 52 of the lip 50 is preferably coplanar with the back flange 12, (see FIG. 6) so that both can abut a wall and foundation that are coplanar. Different configurations are possible for different building configurations. The lower member 40 can further include apertures 56, see FIG. 5, to help bind the weep screed 10 to the plaster at the beginning of another veneer wall finish provided below the weep screed 10 as may be provided in some building constructions. The apertures 56 shown are about inch diameter and about 8 inches apart from one another, although other configurations can be used.

[0035] The weep screed 10 can be made of any suitable materials, including polymers and plastics such as vinyl and PVC, and metals such as steel, and can be formed preferably as a unitary member by extrusion. In the illustrated embodiment of FIG. 1, the height H is about 4 inches and the length L is any desired length. The back flange 12 height H1 from top 18 to lower edge 20 is about 3 inches (see FIG. 2). The upper flange width W1 is about 1 inch (from the outward side of the back flange 12 to the outward side 30a of the front flange 30) and extends at a right angle from the back flange 12 from a distance H2 (see FIG. 1) from the top edge 18 of the back flange 12 of about 3 inches. The front flange 30 height H3 (to the top edge 34) (see FIG. 2) is about 3/16 inches; and the lip 36 of the top edge 34 has a width W2 (see FIG. 3) about 1/16 inches extending inward. The upper member 42 of the bottom flange section 40 extends downwardly at an angle of about 100 degrees relative to the back flange 12. The upper member 42 and lower member 46 of the bottom flange section 40 are both about 1 inch in width W3 and W4 respectively. The angle between the upper member 42 and lower member 46 of the bottom flange section 40 is roughly about 25 degrees, and the lip 50 has a height H4 (see FIG. 2) of about 3/16 inches. The thickness of the various flanges and sections is about 1/16 inches. The weep screed 10 can be made in strips of predetermined lengths, and can be cut to the length needed at the construction site.

[0036] With further reference to FIGS. 6 and 7, a preferred application of a stucco veneer external finish to a building using the weep screed 10 described above is now illustrated and described. FIG. 6 shows a cross sectional view of the completed stucco veneer system and FIG. 7 shows the various layers peeled back from one another for illustration purposes.

[0037] The building has a concrete foundation wall 60 supporting an external wall 62 having framing members 64, such as metal or wooden studs, and sheathing 66, such as plywood, attached thereto. An adhesive flashing tape 70 is applied preferably over the boundary 68 between the foundation 60 and the wall 62 to seal out water. The weep screed 10 is next applied to the outward side of the sheathing 66 over the tape 70 so as to extend over the boundary 68 as shown with the bottom flange section 40 positioned preferably below the boundary 68 to ensure that water draining from the weep screed 10 does so below the boundary 68. The weep screed 10 can be attached/secured to the sheathing 66 with any suitable attachment means such as nails 72 through the weep screed 10 into the sheathing 66 and/or studs 64 as known in the art. An adhesive sealing tape 74 is applied preferably over the nails 72 and extends over the top edge 18 of the weep screed 10 as shown to prevent water from passing through the holes created in the weep screed by the nails 72.

[0038] Next, at least one layer of a weather barrier 74, such as Tyvek fabric, is secured to the outward side of the building wall and extends downward onto the outward face of the back flange 12, terminating at the upper flange 24. The weather barrier is typically about 1/16 inch thick.

[0039] Secured to the building wall on the outward side of the weather barrier 74 and terminating at the upper flange 24 is a drainage mat 76, such as Driwall Rainscreen, a porous material through which water can pass. In the illustrated embodiment, the drainage mat is about inches thick. The weep screed 10 of the illustrated embodiment is configured for use with a drainage mat of about inches thick, having an upper flange width W1 of about 1 inch. Where thinner or thicker drainage mats are used, it may be preferable to use a weep screed configured accordingly, e.g., upper flange width W1 ranges between about inch to 1 inch. For example, for drainage mats 76 greater than inch up to about 10 mm, which is just over inch, a weep screed having a upper flange width W1 of about 1 inches may be preferable.

[0040] Next, secured to the building wall 62 on the outward of the drainage mat 76 and terminating at the upper flange 24 is a layer of mesh material 78 capable of supporting the plaster in place and which stabilizes the first coat of wet plaster. Such mesh materials 78 can include metal lath and metal wire lath and any other suitable materials for such use as known in the art. The mesh material 78 is secured in place by any suitable means, such as staples 80 which pass into the sheathing 66 as shown (FIG. 6), and which also secures in place the weather barrier 74 and drainage mat 76. In the illustrated embodiment, the mesh material 78 is formed of metal lath about inch thick.

[0041] A first layer of plaster 82, called a scratch coat, next is applied onto the mesh material 78, and embedded into the mesh material 78 as shown, forming a layer of about inches thick. The first layer terminates at the upper flange 24. This is followed by a second coat of plaster 84 of about inches thick called a brown coat. A thin final finish coat of stucco plaster 86 of about inches is applied onto the second coat 84 and terminates preferably over the outer face 30a of the front flange 30, incorporating the front flange 30 to provide a nice looking finish, although the outer face 30a can be left exposed if desired.

[0042] As seen in FIG. 6, the apertures 38 are located directly below the drainage mat 76. Any water and moisture that penetrate the plaster can drain or vent down through the drainage mat 76 and out from the upper flange 24 through the apertures 38, as illustrated by arrow 88, onto the outer surface 89 of the upper member 42 of the bottom flange section 40. Once on the outer surface 89, the water is directed away from the building and away from the foundation 60 or any lower veneer finishes. This is contrary to prior art weep screeds in which the water may be maintained underneath the various layers, including the plaster layers, or flow outwardly along the bottom edge of the plaster to drain over an outer edge of the weep screed. Thus, the weep screed 10 of the present invention allows the water to drain from behind the plaster layers, avoiding the cracking and damage problems caused by prior art weep screeds. As another advantage, ensuring that the apertures 38 are directly below the drainage mat 76 and not blocked by some of the other veneer system materials allows airflow into and venting of the drainage mat 76. This helps to keep the drainage mat 76 and space behind the veneer finish dry.

[0043] A second embodiment of the present invention is now described with reference to FIGS. 8 and 9. The weep screed 100 is similar to the weep screed 10 described above, and similar elements are designated with the same reference numbers. The main difference here is the upper flange configuration that will be described in more detail below.

[0044] Similar to the above described weep screed, the weep screed 100 includes an elongate substantially planar vertical back flange 12 having an outward facing side 14, an opposite inward facing side 16, and a top edge 18, which defines the top edge of the weep screed 100. The back flange further has a lower edge 20 and a scored nail line 22.

[0045] Along the lower portion of the weep screed 100 is the elongate bottom flange section 40 extending outwardly from the back flange 12 below the upper flange 24. The bottom flange section 40 includes an upper elongate member 42 extending outwardly and downwardly from the back flange 12 as shown and further includes an outer edge 44 spaced from the back flange 12 and the upper flange 24. The upper member 42 is preferably angled downward, forming an obtuse angle relative to the back flange 12 as described above with reference to the weep screed 10. The bottom flange section 40 further includes the lower elongate member 46 extending inwardly and downwardly from the upper member 42 from a location spaced outwardly from the back flange 12. The lower elongate member 46 extends downwardly preferably at an acute angle with respect to the upper member 42, forming a cavity 48 between the two with a distance of about inches between the two along the inward side 16 of the weep screed. A bottom elongate lip 50 extending downwardly from the lower member 46 defines an edge 52, which also defines the bottom edge 54 of the weep screed 100. Again, the edge 52 of the lip 50 is preferably coplanar with the back flange 12 so that both can abut a wall 62 and foundation 60 that are coplanar. The lower member 46 also includes openings 56 in the lower member 46 for attaching to a stucco veneer below.

[0046] Returning to the upper flange 24, here, the upper flange 24 includes an inner flange section 90 and an outer flange section 92 separated from one another by a divider wall 94. The inner flange section 90 extends outwardly from the outward side 14 of the back flange 12 at a substantially right angle thereto and includes a plurality of apertures 38. The outer flange section 92 extends outwardly from the divider wall 94 at a substantially right angle relative to the back flange 12. An elongate front flange 30 extends upwardly from the outer flange section 92 at a substantially right angle thereto spaced from the back flange, and here extending from the edge 24a forming a sideways J-like structure as shown. The front flange 30 defines a substantially flat and vertical outward facing side 30a and further has an upper edge 30b, which includes a lip 34 extending a short distance inwardly as shown.

[0047] In this illustrated embodiment, the inner and outer flange sections 90, 92 are at different heights relative to one another as shown, here the outer flange section 92 being at a lower elevation than the inner flange section 90. The divider wall 94 has a lower section 96 extending downwardly from the inner flange section 90 from which the outer flange section 92 extends. The divider wall 94 further includes an upper extending section 98 extending above the inner and outer flange sections 90, 92. It is seen that the upper flange 24 forms two channels 32a, 32b between the back flange 12 and front flange 30, here separated by the divider wall 94.

[0048] The weep screed 100 is used similarly with veneer systems as discussed above with reference to FIGS. 6 and 7, the main difference being that the weather barrier 74 and drainage mat 76 terminate in the channel 32a and the mesh 78 and plaster/stucco coats 82, 84, 88 terminate in the channel 32b. This provides a separate channel 32a which collects and drains the water through apertures 38, keeping the water in the channel 32a away from the terminal ends of the plaster coats 82, 84, 88. As an example where the finish is a veneer stone, the weather barrier 74 and drainage mat 76 terminate in the channel 32a, and the matrix 78, scratch coat 82 and stone veneer layer terminate in the channel 32b. Similarly, as with the weep screed 10 discussed above, the widths of the channels 32a, 32b can be chosen for the particular use. For example, channel 32 would have a preferred width of inch for use with a drainage mat 76 of inch. For a thicker drainage mat 76, a wider channel 32a is preferred as discussed above. Likewise, the thickness of the channel 32b can be chosen for the particular use, i.e., thickness of the veneers terminating therein, e.g. brick versus stone versus stucco. As an example, preferable widths for channel 32b can range from inch (e.g. stone veneer) to inch.

[0049] A third embodiment of the present invention is now described with reference to FIGS. 10 and 11. A weep screed 110 is illustrated similar to the weep screed 100 described above, and similar elements are designated with the same reference numbers. The main difference here is the elongate bottom flange section 40 extending outwardly from the back flange 12 below the upper flange 24. The bottom flange section 40 includes the upper elongate member 42 extending outwardly and downwardly from the back flange 12 as shown and further includes an outer edge 44 spaced from the back flange 12. The upper member 42 is preferably angled downward, forming an obtuse angle relative to the back flange 12 as described above with reference to the weep screed 10. However, unlike the weep screeds discussed above, the upper member 42 extends outwardly beyond the upper flange 24 and does not include a lower elongate member 46, instead ending with a downwardly extending lip 112 leading to the weep screed bottom edge 54. This configuration is preferred where the foundation 60 extends outwardly beyond the wall 62, see FIGS. 6 and 7, requiring the additional length for upper member 42 to direct water from the apertures 38 away from the foundation 60. This embodiment also uses rectangular apertures 38 as shown and described for the weep screed 10 above.

[0050] The previous description is provided to enable a person skilled in the art to make and use the present subject matter. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the spirit or scope of the subject matter. For example, one or more elements in the different embodiments can be rearranged and/or combined, or additional elements may be added. Thus, the present subject matter is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.