Garage Roof Insulation R Value

Before you get started however you will need to determine whether you have a flat or cathedral style garage roof.

Garage roof insulation r value. Step 1 choose the type of insulation. Anything thicker will impede the performance of the door itself. Most garage door insulation has an r value of between r 8 and r 12 because it is so thin to fit the space. See the department of energy s doe ranges for recommended levels of insulation below.

Recommended insulation levels for retrofitting existing wood framed buildings. R value for downward heat flow is absolutely different than r value for upward heat flow a vapor barrier is recommended with metal siding and roofing in humid environments. R value measures how well certain building insulation materials can resist heat. It gives us a thermal break.

Nonetheless first determine if you can buy a pre composed insulation kit suitable for your garage. 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. Garages typically aren t built to be airtight and have lots of air gaps to the outdoors. The other option is purchasing a pre insulated garage door that may have a higher r value.

The higher the r value the greater the insulation performance. It s also important to realize the value of air sealing in conjunction with insulation. Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces. Typically you re only going to be able to apply insulation with an r value of around r 8 or r 12 to the door.

Add insulation to attic. Depending on where you live and the part of your home you re insulating walls crawlspace attic etc you ll need a different r value. Garage roof insulation guide insulating and air sealing a garage typically costs less than a few hundred dollars and can be easily accomplished as a diy weekend project. This is due to the limited amount of spacing that s available on the back of the garage door.

The first thing you need to do is choose the type of insulation you are going to use. There are two main types of insulation appropriate for use in garage roofs. This adds insulation to the garage door without impeding its functionality. Existing 3 4 inches of insulation.

If there s a room above the garage it s going to be cold because there s a lack of insulation or at least improper insulation. Know exactly how much you need with our project calculators.