Spray Foam Attic Ductwork

We mean that literally by the way.

Spray foam attic ductwork.

After you seal the duct work you would have more than enough left over to do the box sills which would add to your efficiency. You have to bring in fresh air in a tight home like this so i hope you are putting the v back in hac. The unconditioned space also houses his hvac system. These cost about 400 for 200 board feet.

These allow the furnace to use air from your home for the combustion process. In a vented attic all of that expensive airflow is lost to the environment. We just finished installing an a c air handler with rigid round metal ducts in our attic. Note that this isn t a good idea if you have a very airtight high performance home or if your home simply isn t large enough to provide the air needed for combustion.

We are located in southern ontario canada. When you insulate the top of your attic with spray foam you re bringing your attic into your home s envelope. Some inspectors may require the use of the dc315 thermal barrier coating. As a result you can reduce the temperature in your attic by a lot anywhere from 120 degrees to around 95 during peak summer.

Earlier this year i got a question about a home that had spray foam insulation in the attic. The question is which type brand to use. One huge benefit of the spray foam insulated attic is that conditioned air leakage from the ac furnace duct system is contained and used to condition the attic. Attics with spray foam insulation are so cool.

The ah furnace cabinet will be inside conditioned space as will the duct work. Case of the missing spray foam ted has more than a few cobwebs in his attic. Where allowed foam it green can be sprayed onto duct work to maintain temperature eliminate condensation and reduce vibration. Spray foaming the roof deck is definitely the way to go over foaming the attic floor.

Our plan is to insulate the ducts with spray foam. In my opinion the presentation at the doe link you posted seems to have lost sight of the rationale for using closed cell foam on attic ducts. When we seal the attic with spray foam it s as tight as a butter tub. A lot of builders and homeowners are going with spray foam insulation because of the airtightness benefits but then the questioner mentioned that the spray foam contractor had intentionally left big holes to the outside by not sealing the gable vents.

Each dealer installer we talked to talked up their product and diss the competitor s. The doe and building america specifically did a lot of research on what s required to bury ducts in ceiling insulation. The 1 800 square foot brick ranch in climate zone 4 dates from the 1960s but the previous owner installed both a furnace and ductwork in the attic just four years ago. The spray foam contractor installs louvered grilles between your attic and your living space.

Closed cell foam is very expensive especially the first lift 1 5 in this case. Nothing unusual about that. The installation was done by a hvac pro.