Two types of old insulation that are dangerous to your health are urea formaldehyde foam which is usually gray or yellow and brittle and asbestos.
Dark gray insulation in old attic.
If you see insulation that looks like this there s definitely a big problem.
Cellulose insulation is a perfectly safe type of insulation that is commonly blown into attics.
Cellulose contains a high percentage of recycled paper and does not contain minerals.
This is the blown insulation in my attic.
If you have loose fill insulation that is gray soft and without a shine it is probably cellulose insulation.
On 2018 11 01 by melisa.
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Pull back the insulation to see what s going on behind it.
In general it looks like shredded gray paper.
Consider the key characteristics another way to determine what type of insulation you have in your home is to look at the insulation itself.
For example if the insulation is loose fill grey soft and without a shine you probably have cellulose insulation.
Old attic insulation types.
In this case there s a bathtub just sitting behind the insulation with no air or moisture barrier to prevent the bathroom air from leaking into the attic.
Most people are aware of the dangers of asbestos which may cause cancer and other health problems.
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If it s gray and you can under magnifying glass find occasionally tiny bits of paper it s cellulose loose fill or blown in insulation.