But if the floor is covered in plywood you can t stuff enough insulation beneath it to do the job sufficiently not even in warm climates.
Insulate attic roof or floor.
Whenever possible do insulate the attic floor underneath the subfloor and final flooring materials.
You may also insulate your roof to help regulate the temperature in an attic that is a part of your living space.
If you do need to install insulation in the roof assembly take into account some rules.
Materials commonly used for the insulation of the roof deck include.
Plan to pull up the flooring and layer new insulation on top of the old.
It s more effective and easier to install insulation on the attic floor than in the roof assembly.
But the best solution is actually to insulate both the attic floor and the underside of the roof.
If only the living space will be insulated wrap the insulation around the room s walls and ceiling and then continue along the floor of the non living space.
Insulating a finished attic there are two basic ways to insulate a finished attic.
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.
At the same time the areas below the roof benefit from increased comfort both during the winter and the summer.
Then you could simply insulate the pitched roof.
In this case the area behind the knee wall will be uncomfortably hot or cold.
In this way you prevent the heat from the rooms below escaping to the attic rooms above.
This is the best way to conserve energy in the main part of the home especially if the attic is on its own zoned heating system or if it s used infrequently and its cooler warmer temperatures negatively impact the rooms below.