Insulate Attic Bonus Room

Turning an uninsulated space over the garage into a comfortable office.

Insulate attic bonus room.

Spray foam provides an air tight thermal boundary between your bonus room and the unconditioned air space in your attic. 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. In any case be sure to provide adequate ventilation in any enclosed attic spaces. Bonus rooms are often the least comfortable room in a house and the main reason is that they are the most flawed part of the building envelope especially the attic kneewalls.

Yes i know radiant barrier r value is controversial. Spray foam insulation creates an air seal that will keep you from losing treated air through the ceiling. The solar guard goes over the insulation on the attic side. By utilizing spray foam directly to the underside of the floor sheathing cold floors can be minimized.

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. When finishing a room above is garage it s important to get the insulation details right. Inappropriate mixture or application can result in suboptimal insulating results and hazardous fumes. By scott gibson december 2 2013.

Cellulose can be either a loose fill or blown in insulation in this application. You could opt for spray foam fiberglass or cellulose. Often attic bonus rooms such as my own are above unheated garage or storage space. Now if your bonus room has an attic your options are a little different.

This allows at least half of the reflective insulation to do it s job since it requires a 1 or larger air gap on each side to be a radiant barrier and provide some r value. A bonus room isn t such a bonus when it lacks insulation. So after we seal up the insulated air barrier for the bonus room knee wall we install a thick blanket of cellulose insulation around the duct. The problem with many kneewalls is that they have fiberglass batt insulation with nothing covering them on the attic side as shown in the photo below.

This helps keep the supply air coming into the room nice and warm. Insulating the roof of a bonus room a homeowner faces a familiar problem. This insulation should only be installed by trained professionals.