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 roof tar paper.
United roofing gator skin synthetic roof underlayment 42 in x 285 8 ft 1 000 sq ft synthetic roof underlayment.
It acts as an added moisture barrier.
This kind of material is incredibly resistant to the ultraviolet rays from the sun.
It is also very effective in protecting your roof from water and snow which naturally accumulates on a flat roof.
Many home builders use roof tar when constructing a flat roofed house.
The felt paper is in turn covered with a flood coat of bitumen asphalt or tar and then gravel to keep the sun s heat uv rays and weather off it and helps protect it from cracking or.
How to install roofing tar paper.
Built up roof bur the traditional hot tar and gravel roof is built from three or more plies of waterproof material alternated with hot tar and ballasted by a layer of smooth river stone.
Traditionally most flat roofs in the western world make use of tar or asphalt more usually felt paper applied over roof decking to keep a building watertight.