Use mastic sealant or aluminum foil tape not duct tape to seal all of the duct connections.
Attic sealing tape.
The tape serves as a base for applying the mastic sealant.
In addition unconditioned air can be drawn into return ducts through unsealed joints.
Then finish up by sealing the access hatch with self sticking foam weatherstrip photos 10 and 11.
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It is specially formulated with a thick flexible rubberized backing that conforms to any shape or object.
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.
The attic is usually where you can find some of the largest opportunities to save energy in your home.
Learn how to seal your air ducts here.
If your hatch rests directly on the moldings like ours did add 2 1 2 in wide stops around the.
The acrylic adhesive is pressure sensitive and if the surface is clean the tape will stick.
Get it as soon as fri sep 11.
Attic insulation air sealing experts enjoy a more comfortable healthy and efficient home with quality attic insulation services.
How to tell if you have enough attic insulation.
Foam seal tape 3 rolls 1 2 inch wide x 1 8 inch thick high density foam strip self.
Home comfort problems often start in the attic where poor insulation and numerous air leaks create problems for your heating and cooling system and make your home uncomfortable.
If the supply ducts are leaking heated or cooled air can be forced out of unsealed joints and lost.
Looking across your attic if the insulation is level with or below the attic floor joists you probably need to add more insulation.
Attic insulation levels are rated according to their r value.
Sealing your ducts to prevent leaks is even more important if the ducts are located in an unconditioned area such as an attic or vented crawlspace.
If you cannot see any of the floor joists because the insulation is well above them you probably have enough and adding more insulation may not be cost effective.
The tapeplus roll will adhere to plastic metal steel aluminum tin fiberglass and most other clean surfaces.
The 2 inch wide tape will seal almost any small or medium size hole warp or seam separation.
Combined with attic insulation air sealing can help to alleviate the formation of dangerous ice dams in the winter.
Mastic sealant compound is much more effective at sealing leaks and gaps than tape.
Flex tape is the original super strong waterproof tape that can patch bond seal and repair virtually anything.
Unlike other tapes available flex tape s bond will increase with time and pressure.