Cellulose Blown In Insulation

Written by Courtney Salinas
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Cellulose insulation is very unique because it is sprayed into walls creating a solid barrier of insulation. A building's walls are filled with wires, plumbing, supports and other materials, all of which could make installing insulation very tricky.

Sprayed Insulation Prevents Air Infiltration

Air infiltration is any air that enters the home from the outside. Air infiltration can derail a homeowner's efforts to have an energy efficient home. In order to have a completely efficient home, all tiny crevices should be filled to prevent air infiltration from the outside. Any gaps in the insulation could result in increased utility bills or illness due to drafts or molds.

Because it is blown into the walls, cellulose insulation fills all the quirky crevices and strange spaces your home might have. Typical fiberglass insulation is installed in batts that are cut and pasted together and don't fit well into odd places, and thus leave space open for air infiltration. Cellulose insulation, on the other hand, is sprayed into the walls, creating a solid fortress against leaks and drafts.

Fiberglass insulation also stops 1 1⁄2" from the top of your home at corners and at the spaces where exterior walls meet interior walls. Cellulose insulation can go right to the ceiling. When installed properly, cellulose insulation won't settle and leave insulation gaps near the ceiling.

Proper Installation

Cellulose insulation needs to be installed properly, though. Many problems can arise from the improper installation of cellulose insulation. Cellulose needs to be damp-spray blown instead of just inserted dry into walls. Damp-spray blown cellulose insulation will dry at a much greater density than when it is inserted into walls dry, which tends to settle and leave gaps in the insulation near the ceiling. When damp-spray blowing the cellulose insulation, though, the installation experts need to be very careful. Sealing up the wall before the insulation is dry can cause mold and damage to the walls.

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