This is a correct answer to the following question about Flat roof. Yes or no?
Answer: The tar coating is applied in one or more coats as a hot liquid, heated in a tar kettle , or as sheets of tar impregnated 'paper' glued down and sealed together at joints by hot tar - once it has cooled, the gravel is spread evenly over it.
Question: how long is a flat membrane roof good for?
