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.
Attic insulation material ratings.
Insulation decreases the amount of heat entering from outside when it s hot and traps warmth inside when it s cold.
R value measures how resistant types of insulation are to heat flow.
The table below shows what levels of insulation are cost effective for different climates and locations in the home.
Rigid foam boards trap air or another gas to resist conductive heat flow.
Insulation is rated by its r value.
Insulation r values vary based on the type thickness and density of the insulation material.
A higher insulation r value usually means a higher price point as well.
The higher the r value the better the thermal performance of the 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.
Inspecting your attic insulation.
Its expert engineering lets you create the most comfortable environment without compromising your design.
Type and material of your insulation.
First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation.
R values vary based on the type thickness and density of the insulation material.
R value is a measure of insulation s ability to resist heat traveling through it.
According to home advisor insulating your attic can cost between 1700 to 2100.
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.
Rock wool generally costs more than fiberglass insulation.
The main factors that impact the cost are.
From schools to businesses to family homes our insulation works everywhere.
See the department of energy s doe ranges for recommended levels of insulation below.
You ll need about 12 inches of insulation material.
Bulky materials resist conductive and to a lesser degree convective heat flow in a building cavity.
Gary ombler getty images.
Here are the most popular options for attic insulation along with a ballpark figure on pricing.
For every type and material of insulation check the r value per.
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.
Contractor or insulation installer s fee.
Square footage of your attic.
