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What is Cellulose Insulation?


Cellulose insulation is a type of wood- or paper-based product. It insulates empty spaces in the structural part of a house to slow down the transmission of heat or cold. Cellulose insulation is thick, dense, and clumpy, with a consistency much like down feathers. The chief value of this shape and size is that the insulation can fit in enclosed areas (such as walls) and can conform around obstructions such as wires and ducts (found both in walls and in attics).


Cellulose insulation technically can come from any cellular plant source, such as corncobs or sisal. But generally, it is derived from wood, and more specifically from paper: recycled newspapers, cardboard, office paper, and other common waste paper products. For this reason, cellulose insulation is considered an eco-friendly home product.

How Cellulose Insulation Installed?


The most common type that homeowners will encounter is called loose fill cellulose insulation. This type of cellulose is contrasted by a different type of cellulose insulation that is blown onto open walls, much like spray foam. Moisture introduced into the spray helps the cellulose stick to the wall. With loose fill insulation, though, the cellulose is dry.


•Densely packed bales of cellulose are fed into an insulation blower hopper. Teeth at the bottom of the hopper fluff up the cellulose.

•The cellulose is blown into the attic or walls through long, flexible tubes that run from the blower to the house.

•To fill walls, holes are drilled to permit access. For attics, cellulose insulation is blown parallel to the joists. It can be used on its own or blown on top of existing fiberglass batt insulation.

Cellulose  Advantages


•Loose-fill cellulose insulation can settle around and conform to most of the obstructions found in walls and attics.

•Loose fill cellulose has an R-value of about 3.5 per inch of thickness, compared to fiberglass’ R-value between R3 to R4 per inch.

•When walls are left closed, injecting loose fill cellulose insulation is one of the few ways of adding insulation. One alternative is to pull down the drywall and use fiberglass rolls.

•Cellulose insulation stands up reasonably well against insects and vermin because it is treated with borates.