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.
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.
Many home builders use roof tar when constructing a flat roofed house.
This kind of material is incredibly resistant to the ultraviolet rays from the sun.
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.
Whether you re building a new house or putting a new roof on your existing house installing tar paper first helps waterproof the roof and prevent leaks.
Tar paper is considered an underlayment it goes under a more durable roofing material.
It is also very effective in protecting your roof from water and snow which naturally accumulates on a flat roof.
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.