Asbestos-Cement Roofing and Siding In the early 1900s, manufacturers reinforced Portland cement with asbestos fibers to create a fire-resistant and durable building material. The product, first made in 1905, served as a coating for boilers, steam pipes, and equipment that generated heat.
Can you go over asbestos siding?
Siding shingles are nonfriable because the asbestos fibers are held in place by a cement binder in the shingles. But damaging the shingles can release some of the fibers.
What is Hardie siding?
What Is Hardie Board Siding? Hardie Board siding is a super durable siding product that looks amazing, is long-lasting, and comes with a fabulous warranty. It’s made of cement, sand, and cellulose fibers which combine to create an outstanding material to both protect and beautify homes.
Why is it difficult to see asbestos siding?
As the experts at Asbestos Siding note, it is sometimes difficult to spot because it was often manufactured to resemble different types of siding in a variety of colors and textures. Older style cement siding shingles were traditionally made by mixing asbestos into the cement in order to fireproof and strengthen siding.
What’s the difference between fiber cement and asbestos siding?
The left shingle is an older asbestos-cement shingle and the right photo is a new fiber cement shingle we installed. At above right we illustrate why additional coats of paint on a fiber cement or asbestos cement siding shingle means future painting maintenance will be required.
What kind of paint is used on asbestos siding?
Layers of paint or finish coatings; the original shingles of both asbestos-cement and fiber cement usually come from the factory painted white on one side. Owners often painted cement asbestos shingle siding to make it look fresh, or if it was weathered and fuzzy, to preserve it.
Do you have to remove asbestos from cement siding?
Cementitious siding installed after 1973 is very unlikely to contain asbestos. These materials are known as fiber-cement siding, and they contain no asbestos. Cement-asbestos siding tiles do not need to be removed simply because they contain asbestos. There is no legal requirement to do so, nor is there significant real estate benefit.
