Perpendicular Roof Expansion Joint

Get moisture protection from the top down with roof covers from construction specialties.

Perpendicular roof expansion joint.

Expansion joints in roofs require wood curbs around each roof area. This is better than putting horizontal colorseal in a curb and terminating the roof membrane on the curb because that approach lacks a positive roof membrane integration. Expand o flash expansion joint covers are flexible weather proof exterior covers for expansion joint openings and are an effective flexible closure for a wide variety of standard and special applications. In general the top surface of the curbs should be sloped away from the joint to shed condensation and moisture onto the roof.

Browse roof expansion joint and roof expansion joint covers today. Each expand o flash cover is a combination of a flexible rubber membrane supported by a closed cell foam to form flexible bellows with two metal flanges adhesively and mechanically combined to the bellows by a patented bifurcation process. When properly designed and applied expansion joints will allow for movement in three destinations. The curbs should extend at least 8 or 10 if a cant is used above the adjacent roof.

Perpendicular and parallel to the joint in the horizontal roof plane and perpendicular to the roof in the vertical plane. The waterproofing element of most other roof expansion joints is a looped membrane. Expansion joint systems nystrom s expansion joints are manufactured to solve a variety of expansion joint scenarios. Learn more about our expansion joints and request a quote today.

Custom sizing materials and color finishes ensure that whatever you need for your project we ve got you covered. Watertightness is achieved through positive integration with the roofing membrane and a purpose designed system for transitioning between the joint in the roof and joints in walls. The roof manufacturer s recommendations should be consulted and followed relative to the distances between expansion joints. Our roof covers have extensive model options for flat and built up roofs.

Standing seam roofs are more flexible in the direction perpendicular to the ribs as compared to the direction of the ribs. Because like with our fp systems for plaza decks the roofjoint flanges ensure a static positive integration of the expansion joint to the roof membrane. Our exterior joint systems provide superior aesthetics by hiding joint seams to maintain that crisp look.