If there is no hvac in the attic why not just air seal and insulate at the attic level much easier and less expensive.
Diy conditioned attic 2017.
A conditioned space needs an hvac connection so a vent needs to be run to the space assuming you don t have a boiler.
Creating a conditioned attic without a hvac unit in the attic.
The roof deck in an unvented attic must be exceptionally airtight.
The acceptance of unvented conditioned attics continues to grow among builders and building officials.
In warmer climates unvented attics can prevent the condensation that occurs on ductwork in some vented attic spaces.
The loss of energy efficiency means some designers choose to move the ductwork into the conditioned areas of the home and leave the attics unvented.
One possible solution to the humid attic problem is to install a forced air supply register and perhaps a return air grille in the attic.
A seal the house attic barrier with foam and caulk put in new insulation on the attic floor and replace all the ductwork.
Add weatherstripping around the perimeter and a sweep to the door of a walk up attic.
Or b switch to a conditioned attic by closing the vents insulating and sealing the actual roof.
Where i m from holland vented attics are rare.
Seems to me the only reason to create a conditioned attic is to bring the hvac system and ductwork into the thermal envelope of the home.
Published on feb 21 2017.
Code requirements vary across the country.
Affix rigid foam insulation to the attic side of the hatch or door.
The value of creating a conditioned attic space duration.
Adding conditioned air seems like a good idea though i suspect you could still have stratification depending on how effective mixing is and how frequently the system runs.
And when in the day.
Use a zippered insulated tent to keep the enclosure draft free attic tent at 7 attic cover insulator 120.
Attic hatch or door.
The irc has permitted unvented conditioned attics since 2006 with certain requirements.
We always insulate at the roof not the attic floor.
My initial 200 dollar investment has likely saved me thousands of dollars over the years.
The attic temperature over my garage has dropped by 20 30 degrees.
After completing the solar attic fan install i immediately noticed a considerable drop in my electric bills amounting to 60 70 dollars a month in summer and my ac could now cool my house to a comfortable level without constantly running.