Installing Roof Curb On Metal Roof

Do not use fasteners that are long enough to fully penetrate the tectum.

Installing roof curb on metal roof.

Pressure treated nailers should be provided by the curb manufacturer to receive roofing felts and eliminate noise transfer. Showing how an a c curb is vulcanized and installed on an epdm rubber roof. And in this one sentence lie the benefits and the detriments we face in the roof curb business everyday. Be sure the larger edge is laid so that the small edge of the next panel will overlap it.

Set roof curb in position on top of roof panel. Align the first metal roofing panel so that it overlaps the edging by 1 2 to 3 4 of an inch and is square to the roof line. Placing the curb on and attaching it to the ribs also allows better transitioning from under the roofing on the upslope end to cover the roof on the downslope end. This type of curb has the added benefit of being able to be installed either during the roof installation of after the roof is finished.

Curb installation should be a part of the roof deck not on top of insulation or roofing materials. Install any support framing necessary at this time. Supplied by others 3. Do not oversize relief cuts 4.

Curbs should be a minimum of eight inches above the finished roof and factory insulated to reduce condensation. Measure mark and cut reliefs in bottom curb flanges at each roof panel rib front and rear. Place roof curb back into position and mark the perimeter of the bottom curb flange onto the. It is important for the a c contractor to mark exactly where the curb should be i.

Metal roofing should be installed over tectum using self drilling self tapping screws of similar metal and of sufficient length to go well into the tectum.