How To Seal Attic Bypasses

Seal the foil to the frame with the caulk or adhesive and staple or nail it in place if needed.

How to seal attic bypasses.

Bypasses are hidden air passageways that lead from the heated space into the attic. Then finish up by sealing the access hatch with self sticking foam weatherstrip photos 10 and 11. That s why sealing attic bypasses and air leaks in general is a major part of the minnesota energy challenge. Fan mounted to ceiling below attic.

These energy wasting drafts can be sealed by a specialized contractor. Expandable spray foam is great for larger seams and cracks and can provide a seal in a short amount of time. A spray foam insulator or a caulk insulator can be used to fill in the cracks holes and seams leading up into your attic space. Attic bypasses are hidden air leaks from the heated area of your home into your attic.

Because warm air rises it continuously moves up the bypasses and escapes into. We seal all attic bypasses using a spray foam. The spray foam insulates and seals any cracks or openings that allow airflow into your home s attic. Existing leaks experience a constant airflow and subsequent loss of heat as warm air rises.

Finished rooms built into attics often have open cavities in the floor framing under the sidewalls or kneewalls. The metal box that encloses an exhaust fan is usually not airtight and there is usually a gap between the box and ceiling. Get a professional to get your air under control and you probably won t need to hire an ice dam company to get your ice dams under control. Figure 19 to repair use duct tape or caulk to seal gaps in the metal box and between joints and seams in the duct.

When you re done sealing your attic bypasses push the insulation back into place with an old broom handle or stick as you back out of the attic. Jon fabre senior market planning specialist at otter tail power company demonstrates a do it yourself approach to sealing air leaks in the attic bypass. Apply a bead of caulk or adhesive around the opening. 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.

If you have a finished attic seal behind the kneewalls.