Loose fill tends to settle in time. Cellulose must be properly treated to be fire-resistant. Foam You can purchase cellular plastic products as either prefoamed sheets or batts, or they may be foamed in place by contractors using specialized equipment. Discuss these types with your retailer to determine which is the best for you. Foams possess other properties that may affect its long-term insulating value, such as moisture retention, shrinkage, spontaneous decomposition, and vermin resistance.
Foams also burn, producing smoke and poisonous gases such as carbon monoxide.
You can reduce these hazards by following the recommended installation procedures for each type of foam. Foam that is properly installed has a higher insulating value. 7 - To support insulation between floor joints, lace wire back and forth between insulation. To insulate an attic floor where there is no existing insulation, lay batts or blankets or pour loose fill between the joists. So that moisture from the living areas of your home does not penetrate the insulation and reduce its effectiveness, you must place a vapor barrier between the heated or air-conditioned part of your house and your attic.