A roof mount assembly mounts a structure to a roof having a rafter and a substrate supported by the rafter. The roof mount assembly includes a piece of flashing positioned on the substrate. The flashing includes a first surface, a second surface opposite the first surface and an aperture extending through the flashing. A fastener extends through the flashing aperture. A bracket is connected to the flashing via the fastener, and the bracket is sized to support at least one roof-mounted structure on the roof. A seal is positioned between the flashing aperture and the fastener. The seal is sized to form a water-tight seal with the aperture to inhibit flow of fluid through the aperture. The seal includes a first portion and a second portion, in which the first portion is positioned to abut the flashing first surface and the second portion is positioned to extend through the aperture.

A roof mount assembly mounts a structure to a roof having a rafter and a substrate supported by the rafter. The roof mount assembly includes a piece of flashing positioned on the substrate. The flashing includes a first surface, a second surface opposite the first surface and an aperture extending through the flashing. A fastener extends through the flashing aperture. A bracket is connected to the flashing via the fastener, and the bracket is sized to support at least one roof-mounted structure on the roof. A seal is positioned between the flashing aperture and the fastener. The seal is sized to form a water-tight seal with the aperture to inhibit flow of fluid through the aperture. The seal includes a first portion and a second portion, in which the first portion is positioned to abut the flashing first surface and the second portion is positioned to extend through the aperture.

The present disclosure relates particularly to photovoltaic roofing systems for use in photovoltaically generating electrical energy, specifically, the use of bottom flashings in such systems. Methods for installing such systems and replacing non-photovoltaic roofing elements in such systems are also described.

A kit for flashing a mount of a photovoltaic assembly on a surface includes a flashing assembly. The flashing assembly includes flashing that extends across an interface of the mount and the surface when the mount is attached to the surface. The flashing includes a bottom surface and a top surface. The flashing assembly also includes tape attached to the bottom surface of the flashing. The tape includes a first attachment area and a second attachment area. The flashing assembly has a first configuration in which the first attachment area is attached to the flashing and the second attachment area is unattached, and a second configuration in which the first attachment area is attached to the flashing and the second attachment area is attached to the surface. The tape is movable with the flashing as an assembly when the flashing assembly is in the first configuration. The first attachment area and the second attachment area positioned on opposite sides of the tape such that the tape extends between the surface and the bottom surface of the flashing when the tape is in the second configuration. The kit also includes a container defining an interior space to receive the flashing assembly.

A roofing component formed of polyethylene thermoplastic treated to prevent degradation due to exposure to ultraviolet (UV) light and an apparatus and method of forming the same. The UV treatment may include one or more of a UV absorber and a UV inhibitor. In one embodiment, the UV absorber comprises carbon black that is mixed with the polyethylene thermoplastic. The roofing component can comprise step flashing or a shingle.

A roofing component formed of polyethylene thermoplastic treated to prevent degradation due to exposure to ultraviolet (UV) light and an apparatus and method of forming the same. The UV treatment may include one or more of a UV absorber and a UV inhibitor. In one embodiment, the UV absorber comprises carbon black that is mixed with the polyethylene thermoplastic. The roofing component can comprise step flashing or a shingle.

An expandable flashing device comprises first and second pieces of flashing material that overlap one another with hems or folded edges located on opposite lateral sides of the pieces that hold the pieces together, yet allow the pieces to slide or shift with respect to one another to selectively change the length of the device. In a first stowed position, the pieces overlap one another and in an expanded second position, the pieces may be pulled apart to increase an overall length of the pieces. The maximum length of material that overlaps between the pieces is defined as the overlap range. The overlap range defines the range to which the device can be shortened or lengthened to fit a particular installation. A flashing system and a method of installing flashing are also disclosed.

An expandable flashing device comprises first and second pieces of flashing material that overlap one another with hems or folded edges located on opposite lateral sides of the pieces that hold the pieces together, yet allow the pieces to slide or shift with respect to one another to selectively change the length of the device. In a first stowed position, the pieces overlap one another and in an expanded second position, the pieces may be pulled apart to increase an overall length of the pieces. The maximum length of material that overlaps between the pieces is defined as the overlap range. The overlap range defines the range to which the device can be shortened or lengthened to fit a particular installation. A flashing system and a method of installing flashing are also disclosed.

A roof vent comprising a vent base and a vent top. The vent base broadly includes a frame, an upper flashing, a lower flashing, a left flashing, and a right flashing. The frame includes a lip for attaching the vent top to the vent base. The lower flashing is configured to define an open-ended cavity. The vent base structure prevents rainwater from pooling above the roof vent and diverts rainwater around the roof vent and into the troughs of a corrugated metal roof surface. A sealant material is placed beneath the vent base where it is protected. The upper flashing may include a left vertical wall, a right vertical wall, a left flange, and a right flange configured to divert rainwater over the raised ridges of the corrugated metal roof surface. The vent top is attached to the vent base and includes a collar flashing, a collar, and a cap.

A roof vent comprising a vent base and a vent top. The vent base broadly includes a frame, an upper flashing, a lower flashing, a left flashing, and a right flashing. The frame includes a lip for attaching the vent top to the vent base. The lower flashing is configured to define an open-ended cavity. The vent base structure prevents rainwater from pooling above the roof vent and diverts rainwater around the roof vent and into the troughs of a corrugated metal roof surface. A sealant material is placed beneath the vent base where it is protected. The upper flashing may include a left vertical wall, a right vertical wall, a left flange, and a right flange configured to divert rainwater over the raised ridges of the corrugated metal roof surface. The vent top is attached to the vent base and includes a collar flashing, a collar, and a cap.