In most cases one or two rolls should be sufficient to cover the average shed or workshop.
Flat roof outbuildings.
As opposed to old built up felt roofing with joins new single ply waterproof membranes are now most commonly used.
Flat roofs are an often lower cost and easier to install alternative to traditional pitched roofs.
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 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.
Flat roofs are always built at a slight incline at least 1 8 inch per foot.
This will help you create a flat roof framing plan.
Cheaper to construct than pitched roofs and need less material to cover the same span.
You can do this with a foam layer that exactly fits your roof.
Of all the different roof types for homes and buildings one of the most controversial is the flat roof.
They are common on extensions garages and commercial buildings.
Used commonly on large buildings and outbuildings the flat roof has its own special set of needs and challenges.
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.
Built up roof bur the traditional hot tar and gravel.
Some roofs actually slope in several directions ensuring optimal water runoff.
How exactly a fall is built in largely depends on how the flat roof is built.
How to build a flat roof.
When framing a flat roof you will need to create a slight incline.
Many slope in several directions like squashed hip roofs toward scupper holes that connect to downspouts.