Garage Attic Insulation R Value

Check rim joists and unfinished basement walls and compare depth with an r value map and chart for your area.
Garage attic insulation r value. Recommended insulation levels for retrofitting existing wood framed buildings. Add insulation to attic. This adds insulation to the garage door without impeding its functionality. Existing 3 4 inches of insulation.
If your home s hvac system does extend into the garage then the attic above it should be insulated as it would for any other room of the house. You can insulate the walls ceiling and door of the garage to the highest r value possible but if you fail to fill those air gaps you ll still be wasting a lot of heat. A contractor will come and open up a hole in the wall pump in a cellulose insulating material and then patch up the opening. This will serve the same function of keeping hot or cold air inside the garage as it does for the rest of the house.
As you can see there s some variation in r value depending on the particular type and brand of products used. Things to consider when insulating your garage. When you should insulate the garage. Garages typically aren t built to be airtight and have lots of air gaps to the outdoors.
But newer homes in central and southern arizona are insulated to ratings of r 30 to r 38 while newer homes in northern arizona generally have attic insulation at r 60 because of colder winters. Slide a yardstick or tape measure into the existing insulation. The higher the r value the better the thermal performance of the insulation. You can achieve better thermal performance in your attic by adding an additional layer of insulation.
Paint gas oil cleaning products pesticides and other chemicals are stored on garage shelves right next to the living spaces inside of your home. It s also important to realize the value of air sealing in conjunction with insulation. Most garage door insulation has an r value of between r 8 and r 12 because it is so thin to fit the space. Most garages are a refuge for all kinds of flammable and noxious stuff.
Depending on where you live it s recommended that attics have a minimum r value of r 30 in warm climates to r 60 in cold climates. The other option is purchasing a pre insulated garage door that may have a higher r value. Insulating the attic above the garage will help keep temperatures in the garage a bit more stable but it won t have any appreciable effect on energy bills.