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Rigid board insulation (foam plastic) is an effective draft stop and also increases the R-value of the attic kneewall if installed on the attic side of the kneewall, replacing the need for separate dr...
Ceiling and attic insulation and ventilation (135 KB)
Insulating ceilings is one of the most cost effective energy efficiency measures.
Attic Access (114 KB)A home's attic access, such as an attic hatch, pulldown stairs, or knee-wall door, often goes uninsulated and unsealed, creating one of the biggest holes in the thermal and air barrier between the att...
Ceilings and Attics (144 kb)Insulating ceilings is one of the most cost-effective energy efficiency measures.
Problem: Providing adequate attic ventilation has been a requirement in building codes for several years. The standard ratio for ventilating an attic assembly is 1 to 150 of the area of the space to...
The dangers of powered attic ventilators (57 KB)In a fascinating presentation at the annual meeting of the Energy Efficient Building Association (EEBA), researchers Bruce Davis and John Tooley presented case studies of serious safety hazards and st...
Adequate attic ventilation is a long-standing requirement in building codes. However, conditioned, unvented attics reduce residential energy needs, and under certain conditions sealed attics are allo...
Most building codes require roof vents to expel moisture that could cause insulation or other building materials to deteriorate during winter.
Radiant barriers are materials that are installed in buildings to reduce summer heat gain and winter heat loss, and hence to reduce building heating and cooling energy usage.