First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation.
Attic insulation material ratings.
Achieving greater r values in attics the higher the r value the better the thermal performance of the 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.
Type and material of your insulation.
Insulation with a higher r value will perform better than insulation with a lower rating.
Insulation level are specified by r value.
The table below shows what levels of insulation are cost effective for different climates and locations in the home.
Insulation our building science makes insulation br smarter.
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.
Rigid foam boards trap air or another gas to resist conductive heat flow.
Fiberglass insulation rated at r 15 to fit a standard 4 inch wall costs around 0 50 per square inch as of 2013 according to fine.
R values vary based on the type thickness and density of the material being used.
According to home advisor insulating your attic can cost between 1700 to 2100.
Now that you ve air sealed your attic and basement check your attic insulation levels and add more if necessary.
R value is a measure of insulation s ability to resist heat traveling through it.
Its expert engineering lets you create the most comfortable environment without compromising your design.
The higher the r value the better the thermal performance of the insulation.
You ll need about 12 inches of insulation material.
Contractor or insulation installer s fee.
Rock wool generally costs more than fiberglass insulation.
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.
The main factors that impact the cost are.
Bulky materials resist conductive and to a lesser degree convective heat flow in a building cavity.
Inspecting your attic insulation.
The most effective places to add insulation to older homes are exterior walls attics basements and crawl spaces.
Gary ombler getty images.
The attic is the easiest place to add insulation to improve your comfort and the energy efficiency of your home.
