In general an attic s r value should be between r 30 and r 49.
Attic insulation material ratings.
Cellulose insulation is calculated based on the depth of the blown in insulation.
The various performance levels r 19 r 30 and r 38 is all made from the same insulation material only the thickness of the insulation differs in order to achieve different r values and performance.
Add insulation to attic.
Square footage of your attic.
Existing 3 4 inches of insulation.
Let s say the insulation you ve selected has an r value of three per inch.
Its expert engineering lets you create the most comfortable environment without compromising your design.
Measure the length and width of the area you need to insulate.
According to home advisor insulating your attic can cost between 1700 to 2100.
Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces.
Inspecting your attic insulation.
Cellulose insulation manufacturers association insulation materials run the gamut from bulky fiber materials such as fiberglass rock and slag wool cellulose and natural fibers to rigid foam boards to sleek foils.
Add insulation to attic.
Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.
Decide on the type of insulation to use.
Recommended insulation levels for retrofitting existing wood framed buildings.
Type and material of your insulation.
Your attic should have a certain amount of insulation in it and the recommended level of insulation for your attic is dependent on where you live.
Most homes have some old or existing attic insulation already in their attic.
From schools to businesses to family homes our insulation works everywhere.
The main factors that impact the cost are.
Insulation our building science makes insulation br smarter.
Multiply the length times the width to determine the square footage of the space.
Cellulose a fiber insulation material with a high recycled content is blown into a home attic.
Contractor or insulation installer s fee.
If your current insulation is only five inches deep you will need to add seven inches of insulation to achieve the 12 inch r 38 rating.
In particularly cold climates you might go up to r 60.
