How To Level A Roof Curb

A canted curb for example should be used for a built up or modified bitumen system roofing system.

How to level a roof curb.

Instead measure the highest point of the roof curb that is roofed into the building or right below the unit base rail. Remove any twist within the cu rb due to roof supports and square the curb. See two downloadable forms on our website welded rtu curbs and calculating the pitch of a roof for a visual representation of this data in principle it s straightforward enough. Install cant strips around the curb.

Install 2 inch thick boards or rigid insulation around the curb. Instead coordinating the curb size with the rib spacing to provide a rib to rib curb eliminates fasteners down both sides of the curb in the pan of the roof panels. I have a curb going around an opening in the roof and everything works. Bring field supplied roofing felt up to the top of the curb nailing strips.

Secure the curb to the roof support members. But the top of the curb slopes with the roof slope. In most cases the roof top unit base rail seats down around the original roof curb naturally making the unit larger than the roof curb itself. Here at curbco we re happy to create curb for sloped roofs as long as we have the data we need.

Nail felt into place. I ve attached what i ve got. First the basic design of the curb should take into account the roofing components so that it can be properly flashed into the roof system. 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.