Roof Curb Installation Detail

Use tack welding or other suitable fastening method to secure the roof curb in place.

Roof curb installation detail.

Do not overlap counter flashing over the top of the roof curb. 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. Roof curbs should be supplied by the hvac manufac. As a general rule the curb should be placed directly on the roof support members.

In this case additional. Curbs for roo fi ng systems. If the curb is mounted on the roof deck additional support is necessa ry directly below the curb flanges to minimize vibration. Turer to the general contractor or building manufacturer.

Curbs should be a minimum of eight inches above the finished roof and factory insulated to reduce condensation. Contractors should not be asked to supply or install roof. Pressure treated nailers should be provided by the curb manufacturer to receive roofing felts and eliminate noise transfer. Curbs should be sloped to avert water ponding.

A canted curb for example should be used for a built up or modified bitumen system roofing system. 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. Trane recommends that the roof curb be placed directly on the roof support members and welded into place. The curb can also be mounted on a roof deck.

Install roof curbs rib to rib.