Which Is The Best Insulation For Attic Protection?

by Pavel Romanzi

There are three main sources of insulation that can be used in attics - Cellulose insulation, fiberglass batts and spray foam insulation. Fiberglass batts are the easiest kinds of insulation to install at home but they need special handling due to the fine fibers and gaps that often exist when installing insulation. Cellulose, although cheaper, tends to absorb moisture and in time is compressed reducing the air gaps and therefore the insulation R value. The best insulation for attic or basement heat-proofing is spray foam insulation.There are two types of spray foam insulation: Open cell and closed cell. Open cell foam has an R-value of up to R-3.9 per inch, while closed cell foam goes up to R-6.9 per inch.

Either type of spray foam insulation serves as excellent protection against heat loss from your attic. They act as near-perfect air barriers, sealing off attics without any leaks or bypasses. Not only is conduction of heat impaired, but spray foam attic insulation also eliminates convection heat loss, since air is unable to permeate through the foam.

While the spray foam kind is the best insulation for attic use, it has one significant drawback that impairs its popularity among home owners - it is quite expensive. Apart from the material cost, it requires special equipment to install and must often be done by a contractor who is trained in the procedure.

Foam insulation is flammable. This is of concern to some home owners. However when used in attic insulation, foam is completely covered and poses very little risk.

If you are convinced that spray foam is the best insulation for attics, then you can choose to have it installed even while constructing your building. This way you can have the insulation applied directly to the roof decking over which drywall is placed, totally covering up the foam.

So which option is superior to others? That's not so easy to say with any kind of authority. Foam is usually ideal for many buildings, but is also more expensive. For normal attics, this may not be necessary and the entire attic space can be spared the costlier option. Most of the insulating power comes from the initial couple of inches of insulation, and so that can be carried out with foam and topped up with a layer of loose fill insulation above it.

Spray foam insulation for a couple of inches will line the attic floor, sealing up all cracks and leaks. Then fiberglass or cellulose insulation can be placed over it as another layer. Fiberglass is more expensive and has a lower insulation R value as compared to cellulose insulation.

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One Response to “Which Is The Best Insulation For Attic Protection?”

  • open cell and closed clelopen cell regular sized bubbles and an r-value of 3.5 per inchclosed cell small encapsulated bubbles and an r-value of 6-7.25 per inch depending on manufacturer. Tends to be more expensive per R unit. Material is MUCH more dense.Talk to an insulation’s systems specialist to see which is more economical. Must be licensed to install the stuff. Also look into adding a radiant barrier to improve the attic efficiency.References : Been looking at it too

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