Installing Roof Curb On Metal 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.

Installing roof curb on metal roof. Curb installation should be a part of the roof deck not on top of insulation or roofing materials. The primary function of the curb is to keep weather out while supporting flashing the equipment on it. Be sure the larger edge is laid so that the small edge of the next panel will overlap it. Install the roofing screws vertically along each rib in the panel.

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. Pressure treated nailers should be provided by the curb manufacturer to receive roofing felts and eliminate noise transfer. Do not oversize relief cuts 4. Set roof curb in position on top of roof panel.

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. Showing how an a c curb is vulcanized and installed on an epdm rubber roof. Install any support framing necessary at this time. Do not use fasteners that are long enough to fully penetrate the tectum.

And in this one sentence lie the benefits and the detriments we face in the roof curb business everyday. Prefabricated roof curbs have been in use since the roof has been utilized for something other than keeping weather out. Measure mark and cut reliefs in bottom curb flanges at each roof panel rib front and rear. Supplied by others 3.

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