Insulating the roof is a priority if the ceilings of your home happen to be part of the roof deck as is the case with cathedral ceilings.
Insulating a attic roof.
Whether or not there is an inner roof lining and the total thickness of the roof structure.
Water is insulation s enemy.
Materials commonly used for the insulation of the roof deck include.
If your attic is often used or perhaps you plan to convert it in the future you will need to insulate the inner surfaces of the roof.
Insulating in and around your roof attic space also prevents long term damage from moisture build up or ice damming which results from the warm air trying to escape through the apex of the roof but instead heating up the snow.
That means insulating the attic floor only not the walls and having vents in the roof.
It can be installed in one of two places.
Attic insulation plays a critical role any home s overall comfort and energy efficiency.
Look for water stains on the roof sheathing or damp or moldy spots on attic joists and existing insulation as a clue to where leaks might be.
If you re finishing your attic insulating it to the proper r value can cause a dramatic loss of headroom if you limit yourself to fiberglass batts.
Then blow another layer on top of the roof rafters.
Box out light fixtures.
Typically you will fill the insulation blower with the insulation and blow it between the attic floor joists.
A finished attic should be insulated much like the rest of the house with insulation in the walls and ceiling.
If you have a solid floor covering the roof rafters use the claw end of a hammer to pull the floor up in several locations and blow the insulation under the boards.
The technically correct approach depends on a number of factors.
On the attic floor or beneath the attic roof.
It creates a breeding ground for mold and mildew and ruins the air trapping pockets that block heat flow.
You may also insulate your roof to help regulate the temperature in an attic that is a part of your living space.
To meet all three goals insulating your finished attic ventilating the roof and maximizing headroom use a combination of dense batt insulation rigid foam sheeting and air chutes.
Additionally insulation serves as a way to enhance sound proofing on the uppermost envelop of your house.
With a finished attic insulation must help keep the attic areas comfortable.
Installing attic roof insulation instead of attic floor insulation has several benefits.
Senior engineer manager at icynene john broniek makes the case for the unvented attic assembly and why insulating the underside of the roof makes sense.