Roof Curb Installation Detail

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.

Roof curb installation detail.

The curb can also be mounted on a roof deck. 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. And installed by an experienced erector. Pressure treated nailers should be provided by the curb manufacturer to receive roofing felts and eliminate noise transfer.

A good penetration requires. Curbs should be a minimum of eight inches above the finished roof and factory insulated to reduce condensation. Curbs for roo fi ng systems. Use tack welding or other suitable fastening method to secure the roof curb in place.

Trane recommends that the roof curb be placed directly on the roof support members and welded into place. In this case additional. A canted curb for example should be used for a built up or modified bitumen system roofing system. Turer to the general contractor or building manufacturer.

Contractors should not be asked to supply or install roof. Curbs should be sloped to avert water ponding. 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. Install roof curbs rib to rib.

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