Air leaks, or what are commonly known as drafts, occur at penetrable locations along a ceiling, beneath an attic. Common locations where air has the ability to leak into an attic include gaps between sheets of drywall; holes through which wiring runs; and around an attic hatch cover, a chimney, recessed lighting, or plumbing and mechanical vents. During the colder months, as heat rises through your home, these gaps will allow warm, humid air to circulate into the unconditioned attic. Locating and sealing these leaks will prevent a rise in the ambient temperature of your attic. Energy Star has developed a helpful guide, “A Do-it-Yourself Guide to Sealing and Insulating with Energy Star,” that provides information about what materials, precautions, and methods are necessary to seal attic air leaks.
Published in 07 21 00 Thermal Insulation