Transite originated as a brand that Johns Manville, an American company, created in 1929 for a line of asbestos-cement products, including boards and pipes. In time it became a generic term for other companies’ similar asbestos-cement products, and later an even more generic term for a hard, fireproof composite material, fibre cement boards, typically used in wall construction. It can also be found in insulation, siding, roof gutters, and cement wallboard. The more prevalent transite found in wall construction and roofing tiles for example, will last anywhere from 50 years to over 100 years.
The use of asbestos, a proven carcinogen, to manufacture transite was phased out in the 1980s. It was replaced by crystalline silica, which the International Agency for Research on Cancer has classified as being carcinogenic to humans (Class 1). Crystalline silica is also known to cause silicosis, a non-cancerous lung disease.
Originally, transite had between 12-50% of asbestos fiber added to a cement base to provide tensile strength (similar to the rebar in reinforced concrete), and other materials. It was frequently used for such purposes as furnace flues, roof shingles, siding, soffit and fascia panels, and wallboard for areas where fire retardancy is particularly important. It was also used in walk-in coolers made in large supermarkets in the 1960s, 1970s and even the 1980s. Other uses included roof drain piping, water piping, sanitary sewer drain piping, laboratory fume hood panels, ceiling tiles, landscape edging, and HVAC ducts. Because cutting, breaking, and machining asbestos-containing transite releases carcinogenic asbestos fibers into the air, its use has fallen out of favor. Despite asbestos-containing transite being phased out, it is still not banned in the United States; some 230,000 deaths have been attributed to it. Demolition of older buildings containing transite materials, particularly siding made from transite, requires special precautions and disposal techniques to protect workers and the public.
The transite that is produced today is made without asbestos. Transite HT and Transite 1000 are currently available fiber cement boards that contain crystalline silica, which the International Agency for Research on Cancer has classified as being carcinogenic to humans (Class 1). Crystalline silica is also known to cause silicosis, a non-cancerous lung disease.
Curated with thanks from Wikipedia
If you own a home for any length of time, you will probably plan to improve some aspect of it at some point, even if it’s just painting a door or a wall. And home improvement can also be a great hobby: it can build useful skills and give you a great sense of satisfaction. Of course, it can also improve the function and look of your home, provided it is done correctly!
It is important to use the highest quality supplies and tools when doing a home improvement project. You may spend more initially, but you’ll save money down the road. Better quality products survive wear and tear and last longer. Tools can be expensive and you don’t want to have to replace them regularly.
Before you start remodeling or redecorating a room, bring in a professional for an electrical checkup. This is a legal requirement in some places. You also need to check the plumbing, to be sure that it is in good working condition. It’s no fun having to tear out a new floor or rip into a new wall, to make a repair that should have been done before doing the work.