Most homes built before 1972 do not have insulation in the walls. Also, few homeowners are even aware that their home has empty walls. During the winter, insulated walls will serve to hold the heat in and prevent warmth from escaping. Once insulated, the walls won’t feel ice-cold and condensation/mold is significantly less likely to form. Wall insulation makes a huge difference in the comfort of a home.
During the summer, wall insulation will reduce the amount of heat coming in through the walls and help contain the coolness within your home. The South & West facing walls are often referred to as the “hot walls”, the sun tends to bake on them causing the walls to be hot. These heated walls often tend to radiate heat into the home even well after sundown. Once insulated, the heat entering the home is dramatically reduced.
Wall insulation is usually done when the home is about to be re-painted, re-stuccoed or texture-coated. The reason for this is due to the many holes we must drill on the face of the walls. Wall insulation can not be injected through the attic area nor from underneath the home. We have to drill holes on the face of the wall, from either the exterior or interior.
Attic insulation works both during the summer and during the winter. In summer it reduces heat from coming into the home and in winter it holds heat from rising out. The result is a more comfortable home with lower energy bills year-round. For a better understanding of how insulation works, see our section How Insulation Works.
The attic can be insulated using rolled-in fiberglass, blown-in fiberglass or blown-in cellulose. Your choice, but we strongly feel the cellulose is the best insulation material to choose from. Cellulose is more effective, more efficient, longer-lasting and safer than fiberglass. For more information on materials, see our sections on Cellulose vs. Fiberglass, or our section on Blown vs. Rolls.
Many homeowners believe they have sufficient insulation already in their attic. Ideally, you want to have a performance rating of R-38. Cellulose develops an R-38 rating with approx. 10″ of thickness, while fiberglass requires up to 16″ in order to attain the same R-38 rating.