Because it is flexible and easy to nail through.
Lead is very durable and is able to withstand harsh climates. It is malleable and can be moulded on site to suit a large variety of roofing applications.
LEAD
Because they can last over 300 years If installed properly
It is much too expensive.
Sand is used on roofing shingles to keep the individual shingles from sticking to each other during storage.
Silicone stays flexible where as standard roofing tar hardens and cracks over time.
LEAD
Because they can last over 300 years If installed properly
Lead flashing is commonly used in the roofing industry and can cause lead contamination. Lead can cause problems with water systems if the flashing is not water tight.
Because it's easy to work with, and it's weather proof. (The lead forms a patina when exposed to the elements that seals it in, so it won't leach lead into the groundwater.)
No, gypsum is not used in roofing or paint products
Thick asphalt-impregnated paper used for roofing.
i don't understand exactly what you are asking but.....a form of concrete is used for decks in roofing.
Black Knight roofing tar .
No. Slate is used as a roofing tile.
New trend of roofing sheets.
About 1.03
Yes...carlisle roofing company makes their own.