How To Build A Pitched Roof Over A Flat Roof

You must not build the new roof directly over the old.

How to build a pitched roof over a flat roof.

Flat roofing systems come with benefits and drawbacks. The process of changing the pitch of your roof. To get rid of ponding water problems. Unlike sloped roofs flat roofs are susceptible to ponding water.

Building a roof deck on a pitched roof needs a different approach of framing beneath the joists. Slopes above 3 inches fall to 12 inches run can use shingles. What you need instead is a pair of beam rests on the sill plates which would act as the frame for your roof deck. A new coat of shingles over decaying shingles will cause your roof deck to decay.

Determine the slope of the roof. If excessive damage is present you might not be able to do this at all. If you have a high rise building converting your flat roof to a pitched one may not be applicable. Roofs with a slope of 1 to 3 inches of fall to 12 inches of run should use rolled roofing.

In this case you can build a new roof over the old with a caveat. This guide has been submitted by one of the sites members and so it should help to understand what is involved. Building a pitched roof over an existing flat roof it depends on a lot of variables like the condition of the existing flat roof including the state of the joints and the material its made of. If you own a building with a flat roof the first thing your contractor will do is consult a structural engineer to make sure your structure can handle the conversion.

The solution is changing the roof pitch or building a new roof at a higher pitch than the old roof. Build a stud frame wall at the high end of the proposed roof structure. When it comes to the disadvantages some property owners are being pestered by leaks. Framing your roof deck doesn t involve a ledger attached to the rim joist of your home.