Important Points Before You Insulate!

  • Wear an approved mask and goggles if you go into attic or crawl space to do inspections of duct work or insulation!!!!
  • Please note: if you have old knob and tube wiring or questionable wire connections, such as exposed wiring or opened junction boxes, you must get this replaced or repair before you insulate!!!!!! This type of wiring can present a safety hazard as flammable items may come in contact with exposed or loose connections and can result in fire.
  • Covering with insulation may create a hot spot that could cause a fire. Do not cover light fixtures (can lights) or vent fans.
  • All wiring should meet local electrical code standards to prevent electrical shock and fire hazards. It should be repaired or replaced by a professional.
  • Insulate any above ground perimeter of the foundation with polystyrene blue board or equivalent on the interior of the crawl space Note: Insulation is designed to retain the heated or cooled air inside your home. Insulation is rated by what is called "R-value" (the ability of a material to resist the transfer of heat.).

The areas of your home that need insulation are typically attic, exterior walls, basements, crawl space, ceilings and overhangs. These entire parts make up what is called the "thermal envelope". This thermal envelope is like a blanket. It separates the inside conditioned area from the outside conditioned area. Recommended insulation levels:

  • Attic R-30 to R-38
  • Basement or crawl ceilings R-19
  • Exterior walls R-11 to R-19
  • Slopes R-19 to R-24
  • Foundation walls R-5

Note: Increasing attic insulation to recommended R-value can save up to 30% of your heating/cooling costs. Improving exterior wall insulation can save up to 20% of your heating/cooling bill.