How To Insulate Outside Foundation Walls

Insulating your outside foundation walls can help you manage the temperature inside the house and keep you from insect infestation. Like other types of insulation, doing it right can help you save on costs as it can control the moisture and condensation problems that you’ll otherwise experience.

If you plan to insulate your outside foundation walls, here are the steps you need to do.

Measure the required insulation. Measure how many square feet of insulation are needed for your walls. Get the width of the wall in foot, as well as its height. Afterward, multiply the values.

Buy insulation material. There are various types of insulation materials available. You can choose between foam, strips, and fiberglass, among others. Ask your neighbors about the material they used for insulating their outside foundation walls. Likewise, you can get information online, or by asking your local hardware.

Choose the benefits of each type before buying. For instance, some can repel vapor, while others will need a separate barrier.

Get the required materials.
Insulation materials can cause itching when it touches the skin, so make sure that you have the proper gears like gloves, mask, tape or utility knife. If you plan to use nails or glue for securing the insulation, make sure they are enough to pierce through the insulation material’s thickness.
There are some products online that you can buy as a complete set, or those that are safe enough to use without gloves. Likewise, you can opt to choose one that is easy to tear so it can accommodate outlets and electric wires.

Install insulation. Insulation normally comes compressed in a bag. Make sure that you have enough space for it when the material expands after opening. Cover the whole wall with the insulation. If using foam sheets and there are existing wall studs, cut the material into the same width as the width of the studs. Apply glue or adhesives as necessary. You can also use specialized nails that have plastic washers, protecting the foam material from incurring huge holes.
If you plan to install blanket insulation, purchase enough pieces that you can line on the wall from top to bottom horizontally. Secure the first strip across the wall length, beginning from the top. Install and secure the second one, and make sure that the furring strip where they meet is the same. Complete the insulation by taping the seams where the insulation strips meet.

Make other adjustments. If you opted to use foam as insulation material, use boric acid to prevent future infestation of termites. Likewise, there are other things you can do to increase the benefits and product life of your insulation material. Make a perimeter drainage that contains washed gravel, filter fabric, and plastic pipe. It will help drain the soil and prevent borate chemical in foam insulation from leaching out as what normally happens when there is ground water. You can also use waterproof paint on the interior foundation wall.

Installing insulation for outside foundation walls may be hard at first. But, if you plan to save on electricity costs and protect your wall, it is something that you need to do. If you think that you can’t do it by yourself, employ the help of family and neighbors, or hire a professional to do the work for you.


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