Bypass Sealing

If your attic is poorly insulated, you could save money on your heating and cooling bills by
insulating to adequate levels - provided you first seal attic bypasses.

Air Infiltration and Attic Bypasses Diagram

Bypasses are hidden air passageways that lead from the heated space into the attic. Because warm air rises, it continuously moves up the bypasses and escapes into the attic.

Common attic bypasses are located around chimneys, ceiling light fixtures, heating ducts, kitchen and bath exhaust fans, plumbing, electrical wires, dropped ceilings and soffits.

Dead Space Over A Stairway Creating A Bypass

Bypass Over
A Stairway

In addition to being a source of heat loss, bypasses also cause indoor moisture problems. Warm air leaking into the attic causes moisture to condense onto cool surfaces.

This moisture can rot wood joists and reduce the effectiveness of your insulation. Moisture problems can become so bad it can even "rain" in your attic!

Furnace Flue Chaseway Bypass - Notice The Moisture Stain On The Wall (From Warm Moist Air) And The Black Fiberglass - It Was Acting As An Air Filter Not An Insulator

Furnace Flu Bypass

Bypasses are also the primary cause of ice dams and attic frost.

Also, see attic insulation.

FREE Estimate

We would be happy to come to your home and provide a FREE Estimate of your insulation needs. Please complete the following information and we will contact you to arrange an estimate. Please note our services are only available in the state of Minnesota. Thank you!

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Ice Dams
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