Adding Insulation To Attic Ductwork

Spray foam spreads fire very.

Adding insulation to attic ductwork. Ducts buried in attic insulation. Since your blown in fiberglass insulation is air permeable the moisture in the hot humid attic air will condense on the cold ductwork and drip. Add weatherstripping around the perimeter and a sweep to the door of a walk up attic. The duct insulation should include a vapor barrier cover.

The best way to minimize the possibility of condensation problems in attic ductwork is to insulate the ducts with spray polyurethane foam. In many homes the insulation layer in the attic is along the floor. What would be bad is if the duct work is flex duct and gets mashed under the weight of the added insulation on top of it. Attic hatch or door.

Looking at the cooling side only the additional load would be. So more would help. All the ducts are in the attic. Foil backed self adhesive foam duct insulation.

Pull down stair or ladder. He d add open cell foam below the roof deck to give the assembly the required r value but the bids range from 40 000 to 60 000. According to rightsuite the software we use the supply ducts have about 560 square feet of surface area and the return ducts 101 square feet. R 8 duct insulation 5 227 btu hour.

If you want to cover metal ductwork with blown in insulation t hese steps must be followed in this order. To fit your ducts simply cut the sleeve to length with a sharp pair of scissors. Use metal flex or fiber board ducts that are insulated to code. That works but it is expensive.

The duct work is insulated to keep the condensate from forming on the outside of the pipes and dripping off from the temperature differences in the attic in the summertime with ac running. When adding additional insulation you do not have to use the same type of insulation that currently exists in your attic. It needs to be unfaced. You can add loose fill on top of fiberglass batts or blankets and vice versa.

Like any other insulation use additional layers to provide better insulation power. Mechanically fasten and. Cover the spray foam with fire retardant spray. This isolates the attic from the rest of the home which means the attic isn t part of the conditioned envelope.

Use a zippered insulated tent to keep the enclosure draft free attic tent at 7 attic cover insulator 120. Affix rigid foam insulation to the attic side of the hatch or door. Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords. It comes down to three options the first of which is to convert his attic into a conditioned space by installing 4 1 2 inches of polyiso insulation above the roof deck and then adding a new standing seam metal roof.

One of the most effective ways to convert your attic space into a spare bedroom is to remove the insulation from the floor and add insulation to the attic ceiling. If you use fiberglass over loose fill make sure the fiberglass batt has no paper or foil backing.