Roof Curb Installation Detail

Roof curbs should be supplied by the hvac manufac.

Roof curb installation detail.

Install roof curbs rib to rib. In this case additional. Use tack welding or other suitable fastening method to secure the roof curb in place. Curbs for roo fi ng systems.

If the roof curb will be mounted on a new building it can be assembled at any convenient location and installed as soon as the roof support members are in place. Do not overlap counter flashing over the top of the roof curb. Curbs should be sloped to avert water ponding. Installing curbs that rest in the flat lower panel area of metal roofing invites water tightness problems since the curb now has to be installed and sealed in the most vulnerable area the surface where rainwater flows.

A canted curb for example should be used for a built up or modified bitumen system roofing system. Trane recommends that the roof curb be placed directly on the roof support members and welded into place. Contractors should not be asked to supply or install roof. Turer to the general contractor or building manufacturer.

A good penetration requires. And installed by an experienced erector. First the basic design of the curb should take into account the roofing components so that it can be properly flashed into the roof system. Pressure treated nailers should be provided by the curb manufacturer to receive roofing felts and eliminate noise transfer.

As a general rule the curb should be placed directly on the roof support members.