What is the R-value per inch of cellulose blown-in insulation?

The average R-value of cellulose blown-in insulation of R-3.5 to R-3.8 per inch of thickness.

Is blown-in cellulose insulation toxic?

Cellulose is often treated to prevent pests, but generally, people don't have any reactions when exposed to this type of insulation. It's important to ask manufacturers what they've used to treat their insulation and ensure they've used non-toxic treatment(s).

Does blown-in cellulose insulation contain asbestos?

Home constructed up to the late 1980s may have insulations that contain asbestos in the attic. Cellulose insulation was and remains an alternative to asbestos asbestos free.

Does cellulose insulation mold?

Cellulose insulation is often treated to prevent the growth of mold when exposed to water or moisture.

How many inches of blown insulation should be in my attic?

If you have space, there's often no situation where you can have too much insulation, and homeowners can consult local building codes for the minimum amount of insulation required. As a rule of thumb, aim for a minimum R-38, or 10 to 14 inches.

How long will Cellulose Insulation last?

There are many factors the impact the lifespan and performance of cellulose insulation. When installed correctly and under ideal conditions, cellulose insulation will last for 20 to 30 years.

Is cellulose insulation fire resistant?

Cellulose insulation is often treated with boric acid, a fire and pest resistant chemical that is safe and non-toxic. It's important to ask the product manufacturer if the chemicals used are safe and non-toxic.

In-Depth Product Guide

Cellulose Blown-in Insulation

FAQs

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Cellulose insulation is loose insulation most commonly made of shredded recycled paper, cardboard boxes, and other widely discarded waste paper products. It's considered an eco-friendly product due to its recycled nature. Cellulose insulation is blown, poured, or packed into wall cavities and attic spaces. The density and thickness of cellulose insulation allow for application between walls, in tight spaces, around ducts, and wires.

R-value measures the insulating ability of materials. The thicker the insulation, the higher the R-value. Blown-in cellulose typically has an R-value of about 3.5 per inch, so a 17-inch layer gives you R60. Due to its properties, loose-fill cellulose insulation is one of the only insulation materials that can be added to finished walls. Other common insulation types, such as fiberglass batts, would require the drywall to be removed. Cellulose insulation lasts 20-30 years and will deteriorate over the years, meaning it becomes less efficient over time. Although the lifespan may be lower than it's fiberglass counterpart, it does provide airtight characteristics that fiberglass does not.

Provides good insulation value, is quick to install, and is made from recycled paper.

Some building supply stores will let you rent the cellulose blowing machine for <strong>FREE</strong> if you buy at least 10 bags of insulation.