Can Fiberglass Insulation Be Blown On Top Of Cellulose?

Beware of Insulation contractors who tell you that one type of insulation can not be blown over top of another. This is misleading information to get you to use their product. It makes no difference if you install fiberglass over cellulose. This is about as ridiculous as saying you can’t wear a wool sweater over a cotton shirt.

Beware also of contactors who tell you that you need to remove existing fibreglass insulation before you can install cellulose. This is another ploy to get you to spend more money.

The only insulation that needs to be removed is one that contains asbestos. A common name brand that was used in the 1960’s was Zonolite which was made of vermiculite. If you suspect you have a product containing asbestos you must hire a professional trained and certified contractor to remove it.

There are many homes across Canada including Edmonton that have Zonolite in their attics.