How To Build A Pitched Roof Over A Flat Roof

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.

How to build a pitched roof over a flat roof. The solution is changing the roof pitch or building a new roof at a higher pitch than the old roof. Roofs with a slope of 1 to 3 inches of fall to 12 inches of run should use rolled roofing. Flat roofing systems come with benefits and drawbacks. Build a stud frame wall at the high end of the proposed roof structure.

You must not build the new roof directly over the old. Building a roof deck on a pitched roof needs a different approach of framing beneath the joists. To get rid of ponding water problems. In this case you can build a new roof over the old with a caveat.

If you have a high rise building converting your flat roof to a pitched one may not be applicable. Unlike sloped roofs flat roofs are susceptible to ponding water. What you need instead is a pair of beam rests on the sill plates which would act as the frame for your roof deck. If you have a flat roof on a part of your property they often are susceptible to problems and so it is now common practice to convert a flat roof into a pitched roof.

The process of changing the pitch of your roof. Slopes above 3 inches fall to 12 inches run can use shingles. If the structure contains windows then you ll need a low pitch for example. This guide has been submitted by one of the sites members and so it should help to understand what is involved.

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. Framing your roof deck doesn t involve a ledger attached to the rim joist of your home. A new coat of shingles over decaying shingles will cause your roof deck to decay. Pitched roofs are usually much heavier than flat roofs so an easy replacement may not always be possible.