How to Insulate Basement Walls

We all love to live in a perfect house having an ideal living room, kitchen, porch, study and “basement” isn’t it? Basement is the place or area of the residence which we can use for different purposes as per our needs. But at the same time, it is the place which generally remains at a colder temperature and therefore possesses the threat of being damaged by it. Thus, on that note, it is necessary for us to take care of it properly so that it can serve us the best.

So, if you are also worried about the same, means protection of your basement then insulation of basement walls is the solution. And in this post, we will discuss the same that how to insulate basement walls.

But before moving ahead in this direction, we need to understand some crucial points with attention to get our job done better.

Why Basement Needs Insulation

The answer to this question is straightforward, as in other parts of the home; basement also requires proper care and attention to avoid unnecessary home problems. The basement of our homes is one of those places which remain coolest then all other rooms or areas in the house and therefore contains a high level of moisture level, which increases unbalancing of temperature in your entire home. Moreover, you can find a number of basement apparel like Basement Digital Ventilation System 101″ H Dehumidifier from

WEN 3410 3-Speed Remote-Controlled Air Filtration System (300/350/400 CFM)


Thus, to avoid this problem and also to cut the cost of the heating bills (to keep your home warmer); the insulation of basement walls is a must. Insulating basement walls not only keeps basement, your home warmer but also makes your house more energy-efficient than ever before.

Thus, on that note, you should insulate your basement walls to get benefited. It will keep your home warmer in winter and colder in summer thereby preventing the cold from piercing your basement walls and by adding up a film amid you and the hot burning air outside.

What are the code requirements for Basement Insulation?

For everypart of your home, there are standard codes or values pre-decided by 2012 International Residential Code, which should be followed to avoid any potential risks and same as it is in the case of basements. In the case of basements, there are R-values which you should follow.

What is R-Value?

R-Value is a measure which tells about the thermal resistance of the insulating material to the conductive flow of heat. It is believed that greater the R-value, higher is the effectiveness of the insulating material.  So following are the R-values for Climate Zones 3 and higher as these areas require basement insulation.

Climate Zone 3: R-5

Climate Zone 4 (except Marine Zone 4): R-10

Marine Zone 4 and Climate Zones 5, 6, 7, and 8: R-15.

Which Material to Use for Insulation

Now we all know that there are various types of insulations are available in the market like spray foam, foam board, hybrid and fiberglass and therefore it becomes quite a tough task to select any one for your basement. Thus, to make your work easy, we are here helping you to do so. Furthermore, do remember to use rugs like the Vintage Style Distressed Heat-set Area Rugs

The most important thing in the basement’s wall insulation is that you should select such an insulation material which prevent movement of moisture and at the same time avoid the growth of mold. And for the same foam board type of insulation works the best. It is because this insulation keeps water vapor or moisture in the gaseous state and hence also reduces condensation on the walls of your basement.

So, now when we are aware of all essential things let us know that:-

How to Insulate a Basement Walls

1. Make Stud Wall

The very first step is the creation of stud walls, and it is must because as per the building codes, insulation must be covered and hence youhave to create these wall frames or stud walls. So start by installing wood boards of 2×2 after every 16″ throughout the basement walls. And, 2×4 pressure-treated boards for the bottom plates on the floor. Generally, the heights of the basements remain 8” but to make them fit on the bottom plate, you have to cut them a few inches from the bottom of the vertical boards. Here the thing which you have to keep in mind is that these boards should be just below the sill plate which is present on the top of the foundation wall. You must also get a rug like the Vintage Style Distressed Heat-set Area Rugs from The Rug Source to provide protection from floor leaks.

Home Dynamix Royalty Vega Area Rug, 9’2″x12’6″, Black/Brown/Red


After that, fasten the bottom plate to the floor by “liquid nails” glue and make holes with a hammer drill or masonry bit after every 16” into the floor. After that take a screwdriver to coerce concrete screws into the holes just created. After that, attach the vertical boards of 2*2 in the same manner, past that begin to fasten the screws every 2”, starting from the top.  Now it’s time to attach stud walls, so before attaching to the walls by the concrete screw that boards are perfectly leveled and are vertical. 

2. Insulate the Basement Walls

After that, the next step includes insulation of basement walls. It is one of the best methods of insulating basement walls. Here we are using foam board so in that you have to use a utility knife to slice the foam board and make them fit into the studs. After that make use of construction adhesive and join the boards to walls of the basement.  Next to this cut insulation and push those amid band joist and joists, in the wall which is at 90 degrees to the floor joist. You can use Utility knife from Stanley for this purpose and foam board insulation from AdirOffice. You can also use Owens Corning R-19 Faced Fiberglass Roll 23″ Wide from Amzon to substancially insulate the walls. 

Reflectix BP24050 24-Inch-by-50-Foot Bubble Pack Insulation


3. Apply Vapor Retarder

After that when you have insulated the wall, use 4-mil polyethylene sheeting and apply it on the full wall as it is must when we have used foam board insulation. After that clip it to the top studs and plate and if there any tears then close them with duct tape. For the same, you can use Duct tape by Duck.

Warp Brothers SP-4CH10-C 4 Mil Carry Home Coverall Clear Plastic Sheeting, 10-Foot by 25-Foot (2)


4. Cover up Your Basement Walls

As soon as your insulation gets completed then hang up the drywall as according to the building codes it is must to cover insulated walls with drywall.

Hope this article on the way to insulate basement walls will help you to insulate your basement walls correctly.

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