Rock Wool Manufacturing Company Facts Rock Wool still makes products for residential, industrial and commercial buildings as well as marine applications, none of which contains asbestos.
Is rock wool insulation safe?
In summary, rockwool is a type of thermal insulation made from heated, naturally-occurring minerals. It is generally considered to be safe and effective.
What is rock wool insulation made of?
ROCKWOOL insulation is a rock-based mineral fiber insulation comprised of Basalt rock and Recycled Slag. Basalt is a volcanic rock (abundant in the earth), and slag is a by-product of the steel and copper industry. The minerals are melted and spun into fibers.
How many Johns Manville plants are there?
46 manufacturing facilities
Johns Manville employs 8,000 people and operates 46 manufacturing facilities in North America, Europe and China. Additional information can be found at Manville.
| Type | Subsidiary |
|---|---|
| Parent | Berkshire Hathaway |
| Website |
Is rockwool bad for your lungs?
Not only is rockwool unfriendly to the environment – it’s also potentially harmful to your health. New blocks can contain a lot of dust and loose fibers that can get in your eyes, mouth, skin and lungs. If you’re using rockwool, you should be using a mask, goggles and gloves when you work with it to protect yourself.
What is the R value of rock wool insulation?
3.0 to 3.3 per inch
Fiberglass offers an R-value of 2.2 to 2.7 per inch, while rock wool has an R-value of 3.0 to 3.3 per inch, making it a slightly better insulator than fiberglass, according to the U.S. Department of Energy.
Is Rockwool bad for lungs?
Is there asbestos in rock wool batt insulation?
Reply: most mineral wool insulation does not contain asbestos but there is at least one known exception from an Alabama manufacturer. The short answer is that all research we’ve made to date indicates that Johns Manville Spintex® batt insulation was a rock wool or “mineral wool” foil faced insulating batt product.
When did Johns Manville start making asbestos insulation?
Travelers insured Johns Manville from the 1940s through the 1970s while the company manufactured asbestos-containing products. In 1944, workers from the Asbestos and Magnesia Materials Company, a subcontractor at the Consolidated Steel Shipyard in Orange, Texas, installed Johns Manville insulation.
When was the rock wool asbestos trust fund established?
An asbestos trust fund was established in 1999 to compensate victims. Rock Wool Manufacturing Company incorporated asbestos into mineral wool boards and insulation cement products that were used to help secure pipe insulation. Rock wool is another name for mineral wool insulation.
Is there any asbestos in Spintex mineral wool?
Watch out: while Spintex® is a mineral wool or “rock wool” non-asbestos product, if it was produced at a location where asbestos products were also manufactured one cannot presume that there cannot possibly be any asbestos particles found in the material.
