Installing Roof Curb On Metal Roof

It is important for the a c contractor to mark exactly where the curb should be i.

Installing roof curb on metal roof.

Supplied by others 3. Prefabricated roof curbs have been in use since the roof has been utilized for something other than keeping weather out. Be sure the larger edge is laid so that the small edge of the next panel will overlap it. And in this one sentence lie the benefits and the detriments we face in the roof curb business everyday.

Install the roofing screws vertically along each rib in the panel. Place roof curb back into position and mark the perimeter of the bottom curb flange onto the. Measure mark and cut reliefs in bottom curb flanges at each roof panel rib front and rear. 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.

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. Do not oversize relief cuts 4. Showing how an a c curb is vulcanized and installed on an epdm rubber roof. 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.

Do not use fasteners that are long enough to fully penetrate the tectum. Install any support framing necessary at this time. 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. Set roof curb in position on top of roof panel.

Pressure treated nailers should be provided by the curb manufacturer to receive roofing felts and eliminate noise transfer.