Installing Roof Curb On Metal Roof

The primary function of the curb is to keep weather out while supporting flashing the equipment on it.

Installing roof curb on metal roof.

It is important for the a c contractor to mark exactly where the curb should be i. Showing how an a c curb is vulcanized and installed on an epdm rubber roof. Supplied by others 3. Pressure treated nailers should be provided by the curb manufacturer to receive roofing felts and eliminate noise transfer.

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. 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. Curb installation should be a part of the roof deck not on top of insulation or roofing materials.

Do not use fasteners that are long enough to fully penetrate the tectum. 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. And in this one sentence lie the benefits and the detriments we face in the roof curb business everyday.

Install any support framing necessary at this time. 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. Do not oversize relief cuts 4.

Set roof curb in position on top of roof panel.