Old attic insulation is often inefficient and could lead to unnecessarily high energy bills.
Old brown attic insulation.
If the insulation particles have a certain colour usually grey brown or silver gold.
If the insulation lays flat.
Dirty attic insulation on the other hand could have been the result of pests like rodents and birds that contaminated the insulation which can lead to an unhealthy home.
Brown insulation is available in either blanket rigid foam board or loose fill form.
If either of these situations are the case it s time to remove insulation.
Vermiculite loose fill insulation is one of the most common household materials that contains asbestos.
The particles of the insulation have an accordion like texture.
Here are some guidelines.
It is made from a natural mineral material that is mined from the earth.
Department of energy notes that 75 percent of mineral wool is derived from post industrial content.
Brown insulation is made up of mineral wool which comes from either rock natural materials or slag the scum on the surface of molten metal.
If your home was built before 1990 chances are you have one of the old attic insulation types.