In most cases one or two rolls should be sufficient to cover the average shed or workshop.
Flat roof outbuildings.
They are common on extensions garages and commercial buildings.
Flat roofs usually come with a 10 to 20 year warranty but can last 25 years if you build the roofs right and maintain them using commonsense rules.
When framing a flat roof you will need to create a slight incline.
How to build a flat roof.
Many slope in several directions like squashed hip roofs toward scupper holes that connect to downspouts.
As opposed to old built up felt roofing with joins new single ply waterproof membranes are now most commonly used.
With flat roofs you get none of the impression of bulk that you get with a pitched roof but internal area is not compromised to achieve this.
You can do this with a foam layer that exactly fits your roof.
Flat roofs are an often lower cost and easier to install alternative to traditional pitched roofs.
How exactly a fall is built in largely depends on how the flat roof is built.
All three types of flat roofing cost 250 to 350 per square 100 square feet but prices vary according to region and size of the roof.
A standard roll of roll roofing is 36 inches wide and covers 100 square feet an area that roofers refer to as a square.
Flat roofs are always built at a slight incline at least 1 8 inch per foot.
Cheaper to construct than pitched roofs and need less material to cover the same span.
For flat roofs it is usually installed using a torch down method.
This will help you create a flat roof framing plan.
Some roofs actually slope in several directions ensuring optimal water runoff.
Used commonly on large buildings and outbuildings the flat roof has its own special set of needs and challenges.