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Vapor Barriers Basics
Experts recommend at least on square foot of inlet vent and one square foot of outlet vent for each 150 square feet of attic floor area. However, this can be reduced by one-half if you install a vapor barrier beneath the attic insulation.
  • Vapor Barriers Basics

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    Attic Health:
    Maintain ventilation in your attic year-round. DON'T cover up any attic vents with insulation or block air flow through the vents in summer OR winter.

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    Q: I want to install a whole house fan. However, I'm wondering if the fact that I have loose insulation in my attic presents a problem? Will the insulation blow around? Any installation tips for this project would also be appreciated!
  • find out more in Attic Insulation and Ventilation

  • Follow these links to our archives of past Q's & A's:
  • Attic finishing
  • Attic Insulation and Ventilation

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    Insulation Facts
    Insulation value is commonly referred to as resistance-value or R-value. R-value is the measure of a material's ability to resist heat flow. The higher the R-value, the more effective the insulation is in reducing heat flow. Insulation should be purchased on the basis of its R-value, not thickness or weight. One brand or type of insulation may be thicker or thinner than another. But if both have the same R-value, they will insulate equally.
  • Insulation

  • Home Energy Efficieny Audit
    Use our audit checklist to check areas in your home to help improve your energy efficiency. We cover each area of your house.
  • Home Audit Checklist

  • Recommended R values
    for the walls, ceilings and floors of your home for all areas of the USA and Canada.
    posted November 28,1999.
  • R Values

  • A question and answer article
    on dealing with moisture in the home, vapor barriers, dehumidifiers, etc.
    posted July 25,1999.
  • Moisture in the home

  • Ice Dams
    The snow and ice are building up on your roof's edge. Water is leaking into your house. Here is a look at what causes ice dams, and how to eliminate them.
  • Ice Dams!

  • Moisture or Mildew Problems?
    A complete article on dealing with condensation.
    posted September 17, 1999
  • Dealing with Condensation Problems in your home

  • Even more info!
    A collection of our tips and hints on Attics.
    posted March 27, 2001
  • Attic Tips

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