How much insulation do I need in my attic?

A basic rule of thumb for determining how much insulation you need in your attic is to add 10% of the total square footage of your home’s roof area. For example, if your attic has 300 square feet of roof area, add 30 square feet of insulation. It’s a good idea to have the insulation bathed in a moisture barrier (see below) to help keep the insulation from drying out.

How much insulation to I need in my attic?

The amount of insulation you need in your attic depends on the area of your home and the R-value of the insulation you have in place now. The National Fenestration Council recommends a goal of at least 14 inches of insulation in unfinished portions of the attic.

How much insulation do I need to add in attic?

In order to make sure you have the right amount of insulation added, we recommend getting an actual professional evaluation. If you have the budget, hire a licensed professional roofer to inspect your attic and determine the amount of insulation you need.

How much insulation do I need in my attic to keep it warm?

If you don’t have enough insulation, you’ll definitely be spending more on heating and cooling each month than necessary. Look at the insulation value on the packaging of the insulation you have in your attic and add that amount to the total square footage of your attic. Then, determine how many inches of insulation you need to reach that total.

What is the best way to install insulation in attic?

If you’ve never installed insulation in your attic before, you can hire an experienced professional roofer to do the job. However, if you’re confident in your DIY skills, you can purchase materials online and follow the instructions. Always follow the manufacturer’s instructions for best results.