Perpendicular and parallel to the joint in the horizontal roof plane and perpendicular to the roof in the vertical plane.
Roof movement joints.
Expansion joints in roofs require wood curbs around each roof area.
Joint sizes range from 1 to 2.
The roof system movement at the gable ends of the roof plane can accomplished by one of two methods.
When properly designed and applied expansion joints will allow for movement in three destinations.
This aluminum roof cover is comprised of extruded aluminum components injection molded turn bar duroflex gaskets and a polyethylene vapor barrier.
Nystrom s roof bellows system is an effective flexible joint closure for a wide variety of standard and special applications.
The curbs should extend at least 8 or 10 if a cant is used above the adjacent roof.
The gable trim can be fixed to the supporting structure and the roof float over it via clip attachment as shown in movement at gable a or the gable trim can be affixed to and float with the roof system an be attached to the wall via clips as shown in movement at gable b.
In general the top surface of the curbs should be sloped away from the joint to shed condensation and moisture onto the roof.
The eej cover is 60 mil thick reinforced epdm bellows widely used in roof to roof and roof to wall cant applications.
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.