To determine how much insulation you re going to need measure the length times the width of your attic to get the square footage.
Insulation amount for attic shaft.
Such a casual approach to skylight shaft insulation is no longer acceptable.
The average recommended level is 17 inches of r60.
They sport insulation values of approximately r 6 5 and r 3 6 per inch respectively.
Choose from two types.
Add the right kind of insulation.
When installed properly both types of insulation fill all of the nooks and crannies in a space and make for a perfect air barrier.
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.
The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type.
Type and material of your insulation.
As time passed many of these batts flopped over backward onto the attic floor.
Homeowners availing of the attic or rafter insulation grants under the seai better energy homes programme are required to install insulation achieving the minimum required u values of 0 16 w m 2k for ceiling level insulation or 0 20 w mk for rafter insulation.
Click the button to calculate the amount of insulation in square feet and man hours wall and ceiling fiberglass insulation needed for this job.
Square footage of your attic.
Inspecting your attic insulation.
According to home advisor insulating your attic can cost between 1700 to 2100.
The main factors that impact the cost are.
The higher the r value the better the thermal performance of the insulation.
Closed cell and open cell aka 2 pound and pound respectively.
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.
In zone 3 the average minimum requirement for attic insulation is 9 inches of r30 fill.
First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation.
Contractor or insulation installer s fee.
This calculator is to be used as an estimating tool only.
The average recommended level is 17 inches of r60.
When adding additional insulation you do not have to use the same type of insulation that currently exists in your attic.
Input length and width of area to be insulated.
In zone 4 the average minimum requirement for attic insulation is 11 inches of r38 fill.
In the past builders paid little attention to sealing air leaks in skylight shafts and insulation usually consisted of a few fiberglass batts.
A homeowner s guide to attic and rafter insulation.
Then reference the back of the insulation package to determine the proper height to get the right r value for your project.
