Roof Curb Installation Detail

Contractors should not be asked to supply or install roof.

Roof curb installation detail.

In this case additional. 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. Roof curbs should be supplied by the hvac manufac.

Curbs should be sloped to avert water ponding. As a general rule the curb should be placed directly on the roof support members. Install roof curbs rib to rib. Do not overlap counter flashing over the top of the roof curb.

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. Pressure treated nailers should be provided by the curb manufacturer to receive roofing felts and eliminate noise transfer. Turer to the general contractor or building manufacturer. And installed by an experienced erector.

If the curb is mounted on the roof deck additional support is necessa ry directly below the curb flanges to minimize vibration. A good penetration requires. A canted curb for example should be used for a built up or modified bitumen system roofing system. Curbs should be a minimum of eight inches above the finished roof and factory insulated to reduce condensation.

The curb can also be mounted on a roof deck.