The dangers of attic mold.
Black wool attic insulation danger.
Rock wool is usually gray white off white or brownish white.
Older types of insulation include loose fill or batt fiberglass which can be pink yellow or white.
It can often be found in creases and corners as well as inside or behind insulation.
I see small blotches of gray insulation throughout the blanket which indicates that this insulation is black coated due to serious venting issues within the attic.
The black color is not the color of the insulation.
If it is white however it may be a newer product.
By mackenzie wright updated september 30 2017.
It is a manufactured product made by melting basaltic rock and dolomite with added binders.
They are concerned that fiberglass may cause cancer although the national toxicology program ruled that the warning applies only to some kinds of glass wool fibers that can be inhaled such as during the insulation installation process.
Looking at the very first pic that you posted it appears to be a rock wool insulation.
While this type is often still used older insulation may be discolored or torn and is therefore less effective.
The raw materials are melted in furnaces and blown with air or steam over spinning drums or a centrifuge to create the fibers picture making cotton candy.
Asbestos is a fiberous form of silica and traces of material that appear similar to asbestos under.
Rock wool is a silica based stranded insulation very similar to fiberglass.
Blown in spray foam batts and blankets.
Most homes in america have fiberglass insulation and some people worry that it could be harmful to their health.
Your options for attic insulation range from radiant barriers to sheets of mineral wool but most homeowners stick with products made from cellulose or fiberglass.
Mineral wool was the most common thermal insulation for residential use until the 1960 s when fiberglass insulation become the standard.
On wood or drywall it can look like a discoloration or stained area in large to small splotches or smaller spots and speckles.
We offer our review of the three most popular types of attic insulation with a look at each one s pros and cons.
Rock wool insulation.
But while many see the benefits of insulating our houses.
Fiberglass insulation a man made mineral fiber con structed from a variety of materials such as sand and recycled glass is the most popular form of insulation in the united states more than 90 percent of homes in america are lined with the pink stuff source.
If the insulation is wool like and gray it may be loose fill rockwool.
Brown or black in color.
Fiberglass insulation or glass wool is a man made vitreous fiber.
