Roofing termination device

E - Fixed Constructions – 04 – D

Patent

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Details

E04D 1/36 (2006.01) E04D 13/14 (2006.01) E04D 13/155 (2006.01)

Patent

CA 2191459

A device (10) for terminating a roof surface at a vertical edge in a waterproof and airtight manner may serve as a flashing strip at a parapet wall, a wall cap, a roof edge, an expansion joint or in other roofing applications. The device comprises a relatively rigid member (12), typically of sheet metal or the like, and a flexible member (14), typically of modified coal tar bitumen, EPDM, or other suitable roofing material. The device has a channel (16) formed in the rigid member alonga longitudinal edge that receives the flexible member in an airtight and watertight manner. In this configuration, the flexible member provides a covering for the fastening surface (24) on the rigid member, which is fastened by conventional means (108) to the roofing surface (100) and the underlying support structure (110). The preferred channel is formed from a pair of longitudinal bends (18, 20) made in opposite directions such that a "Z" shape cross section is formed. The first edge (28) of the flexible member is coated with an appropriate sealant, positioned into the channel and compressed into place. In some applications, at least one portion (90) of the rigid member near the first bend forming the "Z" shape cross section is pressed into the first edge of the flexible member, as achieved by a metal press brake, with the press brake in some instances perforating the rigid member at the point of impressing.

Un dispositif (10) pour finir une surface de toiture au niveau d'un bord vertical, de manière étanche à l'air et à l'eau, peut servir de bande d'étanchéité sur un mur de parapet, un chapeau de mur, un bord de toit, un joint de dilatation ou dans d'autres applications de couverture. Le dispositif comprend un élément (12) relativement rigide, généralement en tôle ou équivalent, et un élément souple (14), généralement en bitume au goudron de houille, EPDM, ou en autre matériau de couverture approprié. Une rainure est formée dans l'élément rigide du dispositif, le long d'un bord longitudinal qui reçoit l'élément souple de manière étanche à l'eau et à l'air. Dans cette configuration, l'élément souple assure une couverture pour la surface de fixation (24) située sur l'élément rigide, lequel est fixé par des moyens classiques (108) à la surface de couverture (100) et à la structure de support sous-jacente (110). La rainure préférée est formée à partir d'une paire de coudes longitudinaux (18, 20) orientés dans des sens opposés de sorte qu'une section en Z soit formée. Le premier bord (28) de l'élément souple est revêtu d'un matériau d'étanchéité approprié, placé dans la rainure et maintenu en place par compression. Dans certaines applications, au moins une partie (90) de l'élément rigide située à proximité du premier coude formant la section en Z est comprimé contre le premier bord de l'élément souple, au moyen d'une presse plieuse de métaux, laquelle, dans certains cas, perfore l'élément rigide au niveau du point de compression.

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