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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...
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...
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.
Duct Sealing (69 KB)Air distribution system ducts are designed to supply conditioned air from space heating and cooling equipment to the living spaces and return an equal volume of air from the living spaces back to the ...
Most building codes require roof vents to expel moisture that could cause insulation or other building materials to deteriorate during winter.
Attic Access (146 KB)A home's attic access, such as an attic hatch, pull-down stairs, or knee-wall door, often goes uninsulated, representing one of the biggest deficiencies in the thermal barrier between the attic and co...
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...
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.
Study after study shows that ducts in new buildings are not only not airtight, but often have major leaks. Adding pressurization tests to code requirements would give teeth to the existing air-sealing...