How To Insulate Finished Attic So It Stays Cold

There are two basic ways to insulate a finished attic.

How to insulate finished attic so it stays cold.

Generally bat insulation or blown in fiberglass or cellulose are the most common for a cold attic. Attic fans push out the hot air and pull in the cool air from the vents installed on your roof. To ensure that the attic fan is working properly you need to make sure that your attic is sealed up tight where it touches the ceiling of the top floor. Since parts of a finished attic are usually very close to the roof insulation often blocks proper ventilation that is needed under a roof structure.

This keeps it cold thus the name cold space. This will give 10 inches of insulation and break the thermal bridge. Fill the space between the rafters tight to the baffles and then lay another layer of batts across the rafters. Adding an attic fan can improve the airflow in your attic to keep it cool.

Without properly ventilating the roof your finished space can be just as unpleasant as an unfinished attic. Most codes require a specified minimum amount of headroom and it s tough to meet this requirement when insulating a finished attic especially since most codes require insulation equal to r 38 or more. Staple or tack the 6 mil poly vapor barrier to the ceiling side if the rafters. 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.

It also helps keep warm air from rising to the underside of your roof and melting the snow creating those dangerous ice dams as well as frost in your attic. Without properly insulating your finished attic room will also be cold in the winter.