How To Insulate Finished Attic So It Stays Cold

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.

How to insulate finished attic so it stays cold.

This keeps it cold thus the name cold space. Adding an attic fan can improve the airflow in your attic to keep it cool. Staple or tack the 6 mil poly vapor barrier to the ceiling side if the rafters. Without properly ventilating the roof your finished space can be just as unpleasant as an unfinished attic.

Without properly insulating your finished attic room will also be cold in the winter. Generally bat insulation or blown in fiberglass or cellulose are the most common for a cold attic. This will give 10 inches of insulation and break the thermal bridge. 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.

Fill the space between the rafters tight to the baffles and then lay another layer of batts across the rafters. In this case the area behind the knee wall will be uncomfortably hot or cold. 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. 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.

There are two basic ways to insulate a finished attic. 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.