Attic Insulation Material Comparison
The type of attic spray foam insulation you choose makes a huge difference in your home’s energy efficiency. Insufficient attic insulation, low R-values, and air leaks cause heating and cooling systems to work harder, increasing your energy bills. To reduce these costs and make your Wisconsin home more comfortable, it is important to understand how each type of attic insulation works, its R-value, and whether or not it has a fire retardant.
Fiberglass – Often the first attic insulation material homeowners consider because it looks like cotton candy and clouds, fiberglass is made from tiny slivers of glass fibers that were originally sand and recycled materials. It is available in rolled and blown forms. Rolled fiberglass is less expensive than cellulose, but the slivers can get caught up in electrical conduits, piping and other obstructions in the attic, resulting in voids and a diminished R-value. For the best performance, use a blown form that can reach hard-to-reach areas of the attic.
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Reflective Foil – This attic insulation is an effective choice for hot climates, as it deflects radiant heat, reducing the load on air conditioning systems. It is inexpensive and easy to install, and does not promote mold growth. However, it does not block air flow between the attic and the living space, making it less effective in cold climates.
Foam Board Insulation – Made from polystyrene, polyisocyanurate (polyiso) or polyurethane, foam board insulation is available in a variety of widths suited to standard wall studs and attic trusses and rafters. It can be purchased in pre-cut batts or in continuous rolls, and it is often paired with a flame-resistant facing for basement walls and special applications such as attic hatches. Closed-cell foam provides a high R-value per inch, and an effective air barrier to seal gaps and leaks. It is also durable, but must be installed by a professional due to its chemical handling.
Noble Insulation Inc
1201 Pennsylvania Ave Unit D, Richmond, CA 94801
650-686-2965
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