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A Guide to Applying Spray Foam Insulation

Spray foam insulation is a thick insulation and air seal product that seals air gaps around walls, ceilings, and floors and prevents air from moving through. This includes areas where doors and windows meet walls and windows, and where ceilings meet floors. The spray foam insulation Dallas will stop the movement of cold and hot air by reducing or eliminating the air gaps.

This new construction product is used in many new construction projects. It is popular in many new homes as well. Spray foam insulation can add energy efficiency to existing homes, save on cooling and heating costs, and increase the resale value of a home. Many homeowners are finding it is a practical and economical addition to their home.

In older homes, there are often cavities or air leaks that are not easily detectable. In these areas, spray foam insulation can be applied to close the air gaps and prevent air leakage through tiny holes. These gaps let in cool air from outdoors, but keep warm indoor air from entering through tiny gaps in the walls. In the summer, these gaps allow heat to get inside.

In older homes, a fiberglass insulation board is usually applied to the cavity wall, or to the entire cavity if there is one. If the walls are plaster, the fiberglass insulation will be glued into the plaster. The glue will form a seal that forms a dense barrier to keep hot and cold air out of the home. The board will be painted with an exterior color to blend with the house and existing siding, and sometimes with an interior color to match the siding. In areas that have brick on the outside, the fiberglass insulation will be painted with an exterior color to blend with the brick and provide a seal.

Spray foam insulation can also be sprayed onto cavities in the wall to close gaps, prevent air leakage through tiny holes, and increase the structural strength of the wall. It works best on unheated crawl spaces, cold basements, attics, unventilated attics, and cold garages. It will not work well for crawlspaces with concrete walls because of the high air leakage rates there. It also does not work as an interior wall.

A good spray foam insulation product to install in crawl spaces, exterior walls, and attics is called PFO (or polyethylene fiberboard). This product comes in sheets that need to be laid horizontally. It is cut to the right size, rolled, placed, and secured like a panel. It provides good insulation for the areas it is installed in. It is relatively easy to install, is safe for most wood surfaces, easy to clean, and has a durable protective seal.

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