How To Conditioned Attic Space
Making the attic a conditioned space taking the building envelope to the roof is a good approach and will save energy another approach is to use radiant coated deck sheathing seal all ceiling attic penetrations and blow in r 60 insulation as it will cost less than spray foam and should give at least the same energy efficiency to the home.
How to conditioned attic space. The loss of conditioned air increases heating and cooling demand. Codes vary from place to place but the rule of 7 for using an attic as an actual room typically applies. An open attic might be used for storage or to take heat load off attic based hvac equipment and duct work. A design decision to have a central ducted heating and cooling system with ducts and air handler located in the attic is another good reason to insulate and air seal at the roof line which will provide a conditioned or semi conditioned space for the hvac equipment.
My guess on what i would need to do. Humid indoor air that escapes into the attic can. This might entail encapsulating the foam with roofing on the top and sheetrock on the underside of the foam. Close the window attic vent somehow since im not sure.
Put hard foam pink stuff in between the beams im just not sure how to keep it on the roof. Close the connection between attics with a door since i may still need access to that new attic. Hire a pro to install spray foam insulation. 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.
If you planned to leave the open cell foam exposed to the attic it would certainly dry to the inside much more easily. Require air sealing and air barriers including attic hatches flues piping lighting wiring chases attic eaves dropped ceilings and knee walls. Pull down stairs won t work for an attic room so you must add a permanent staircase. If you re considering turning your attic into conditioned storage or living space it s worth changing tactics to insulate between the rafters and wall joists instead of the floor.
At least half of your attic space must be 7 feet high by 7 feet wide with a total of 70 square feet. But you may plan to finish the room for living space.