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Wall and Ceiling Insulation

Insulation provides a thermal barrier that keeps your house cooler in the summer and warmer in the winter. Insulation should be placed in all external walls and ceilings. Rated with an "R" rating to indicate its effectiveness as an insulator (the higher the rating the higher the insulation capability), insulation comes in various materials and forms. The three most common are:

  • blankets - available in rolls or batts and made from fiberglass or rock wool, blankets are commonly use to insulate attics and other areas where the house's framework is exposed. The blankets fit between the frame.
  • blow in - either loose insulation or spray foam is blown into openings in sealed areas though would otherwise be inaccessible. Only small jobs can be done easily by the do-it-yourselfer.
  • rigid - polystyrene polyurethane, or polyisocyanurate foam available in panels, usually used in new construction.

Insulation works by trapping air inside, so do not compress it or it will loose its insulation value. Also, it's important that you completely insulate. Leaving a doorway uninsulated, for example, will greatly diminish the value of the remaining insulation work, much like leaving the lid off a bottle.

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