The book of roofs johns manville 1923.
How is roofing tar made.
Built up roofs or burs also called a tar and gravel roof is a well established and popular style of flat roof that is made up of alternating layers of roofing felt or fiberglass and asphalt that is applied with heat which combine to make a long lasting sturdy roofing system.
It is made of a mix of cement and asbestos fibers and as the majority of the materials which contain asbestos it is only dangerous when damaged and in poor condition.
It is resistant to all weather conditions making it a great option for homes that have flat roofs.
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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.
Pros and cons of roofing tar.
It was one of the most used types of asbestos containing material for roof building mainly as an underlayment.
Roofing tar is a dark oily mixture used on flat roofs to fix leaks.
Fiber cement shingles that simulated the look of slate and clay were particularly common.
Gravel is an excellent fire retardant.
It is made from coal tar and petroleum byproducts.
It is black and pretty difficult to remove.
Typically this material is a dark and oily mixture made from coal tar and petroleum byproducts.
This tops anything i have seen in 25 years of roofing duration.
Roofing tar is a good choice for a flat roof as this kind of material is highly resistant to the ultraviolet rays from the sun.
The worst roofing job ever.
Formulation and types of roofing tar.
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The combination of asbestos and cement resulted in fiber cement which when applied as roofing shingles made for an extremely durable product weighing significantly less than clay and slate tiles.
Roofing tar is quite versatile and this durable waterproof substance provides protection from water uv rays sunlight and cold weather.
