basemen insulation standard


Old 05-26-02, 06:52 AM
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basemen insulation standard

What is the standard for installing fiberglass insulation in finished basements?

Is there an online guide that will show me the correct installation techniques that will help me pass a local inspection?

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Old 05-27-02, 07:58 AM
Join Date: Aug 2000
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Installing insulation

For general insulation info:

For installation tips of fiberglass insulation with photos:

Facts about fiberglass:

Rigid foam insulation has become popular in basements due to its water resistance.

"Extruded polystyrene: R-5.0 per inch: Extruded polystyrene is made by four manufacturers in the United States, each of which uses a distinctive color: blue, pink, green and yellow. From the user's standpoint, all four are basically the same. Extruded polystyrene is very resistant to water penetration and is a good material for insulating foundations below grade.

Expanded molded bead polystyrene: R-3.5 to R-4.5 per inch:
Sometimes referred to as "beadboard", expanded polystyrene insulation is very similar to the material used to make common coffee cups -- both are made of tiny beads fused together. The R-value varies with density. Expanded polystyrene is resistant to water penetration and is suitable for below grade use except in very wet sites." Insulation Materials Selection & Installation. The Virginia Energy Saver's Handbook. Retrieved 27 May 2002.

Check with local codes regarding type of insulation and R-value required. Go to to view a list of the most common mistakes.
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