House Insulation Guide

R-value

• Every piece of insulation is labeled with its corresponding R-value, which is the measure of the amount that the specific material restricts heat transfer. The higher the number of the R-value, the greater its insulating properties.

Types of Insulation

• Four main types of insulating material for large spaces are available. Fiberglass batts are manufactured in standard widths so they fit perfectly between framing in walls and ceilings. Cellulose is a loose fill insulation that is blown into walls and attics. Rigid insulation is produced from either fiberglass or compressed plastic foam that is most often used on foundations and exterior walls. Spray foams for insulating walls and ceilings are typically a job for a professional, but homeowners can use the same material available in spray cans for smaller scale insulating jobs.

DIY Insulating

• Insulation can be installed professionally or as a DIY job. When choosing to install insulation yourself, the best approach is to choose the type that will be easiest for you. For most people, this means fiberglass blankets or batts. If the insulation will need to cover a large amount of space, loose-fill type may be easier as long as you can rent a blower and use it effectively.

Vapor Barriers

• Water vapor that passes through insulation condenses into moisture once it meets cooler air. This moisture is then trapped and can potentially result in wood decay as well as foundation damage. The most common way of fighting this eventuality is with a vapor barrier that is installed between the insulation and the interior of the home. Vapor barriers can be constructed from polyethylene that is installed under the wallboard or with foil barriers that come as part of some fiberglass insulation products.

Insulating Other Household Areas

• The most common application of insulation that usually comes to mind is that inside the attic or walls. Insulation is an effective means of controlling heat loss when applied to other areas of the house as well. Insulation around a water heater can help to keep the water hot before it is sent to your faucets. Insulating pipes assist in controlling heat loss. Blanket insulation wrapped around air ducts will increase the efficiency of your heating and cooling system.

Weatherstripping

• House insulation also covers the installation of weatherstripping to doors. This addition obstructs drafts and moisture that penetrate exterior doors. The lack of insulation against these elements can create uncomfortable climate conditions on a daily basis as well as add up over time to create substantial energy losses that are reflected in your power bill.