Question

Can you put a pitched roof over a flat roof?

Answer 1

Yes you certainly can install a pitched roof over a flat roof and the pitched roof will work much better on the building you're planning on installing the pitched roof on.

All you have to do is just install pitched roof trusses on top of the existing flat roof and then either install roofing shingles or metal roofing onto the pitched roof.

When you install a pitched roof your roof will require much less maintaining then it did when it was a flat roof.

I installed a pitched roof onto a flat roofed garage before and it made a huge difference in the water draining off.

Answer 2

A pitched roof can be installed over an existing flat roof and you just add some roofing trusses onto the roof or frame the roof trusses onto the flat roof yourself.

You just need to attach the pitched roof trusses to the existing flat roof and then apply your roofing materials to the roof.

Having a contractor do the job can cost around $3,000.00 to $6,000.00 but if you do it yourself you can usually add the pitched roof onto the flat roof for around $1,000.00 or a bit more depending on the cost of materials.