1 Insulation a Types of Insulation b R Value c Inspecting 2 Air Leaks and Gaps a Finding Air Gaps Outline b Filling Air Gaps c Problems with Tightness
4 Windows Outline (continued) a Types b Barriers 3 Fireplaces 5 Summary
Insulation According to Energy Star, 20% can be saved on heating and cooling by using proper insulating and sealing.
Insulation: Types FormInsulation Materials Where ApplicableInsulation MethodsAdvantages Blanket or Batts Fiberglass, mineral wool, plastic fibers, natural fibers Unfinished wallsFitted between studs, joists and beams Do-it-yourself Foam Board or Rigid Foam Polystyrene, Polyisocyanurate (polyiso), Poylurethane Unfinished wallsMust be covered with building code approved materials for fire safety High insulation value for relatively little thickness Loose Fill Cellulose, Fiberglass, Mineral Wool Existing wall or open new wall cavities, unfinished attic floors; hard to reach places Blown into places using special equipment; sometimes poured in Good for adding insulation to existing finished areas Sprayed Foam Cementitious, Phenolic, Polyisocyanurate, Polyurethane Enclosed existing wall or open new wall cavities, unfinished attic floors Sprayed inGood for adding insulation to existing finished areas Reflective System Foil-faced kraft paper, plastic film, polyethylene bubbles, cardboard Unfinished walls, ceilings and floors Foils, films, or papers: fitted between wood frame studs, joists, beams Do-it-yourself, effectiveness varies
Insulation: Inspecting What You SeeWhat It Probably Is Depth (inches) Total R-Value Loose Fibers Light weight yellow, pink, or white dense gray or near-white, may have black specks Fiberglass Rock wool = 2.5 x depth = 2.8 x depth Small gray flat pieces or fibers (from newsprint) Cellulose= 3.7 x depth GranulesLight-weightVermiculite or perlite = 2.7 x depth BattsLight-weight yellow, pink or white Fiberglass= 3.2 x depth Inspect the attic and any other areas of the house where there might be exposed insulation, such as walls and floors adjacent to the unheated space, like a garage or basement. Check for gaps in the insulation Check for compression of the insulation