How To Insulate Finished Attic So It Stays Cold

Staple or tack the 6 mil poly vapor barrier to the ceiling side if the rafters.

How to insulate finished attic so it stays cold. Attach your ceiling material so the insulation won t fall through. 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. Adding an attic fan can improve the airflow in your attic to keep it cool. Attic fans push out the hot air and pull in the cool air from the vents installed on your roof.

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. Without properly insulating your finished attic room will also be cold in the winter. This keeps it cold thus the name cold space. There are two basic ways to insulate a finished attic.

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. Generally bat insulation or blown in fiberglass or cellulose are the most common for a cold attic. Fill the space between the rafters tight to the baffles and then lay another layer of batts across the rafters. This will give 10 inches of insulation and break the thermal bridge.

Without properly ventilating the roof your finished space can be just as unpleasant as an unfinished attic. 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.