Insulating Basement Walls with Rigid Foam Boards

The basement walls of your home are probably the last place you think about when it comes to insulation. But, according to a study from Lawrence Berkeley National Laboratory, basement walls account for 25% of heat loss in homes. And unfortunately, fiberglass batts don’t do much to help with that. This article will teach you why basement wall insulation is so important and what materials work best for the job.

What Is Basement Wall Insulation?

Basement wall insulation is the process of installing a rigid foam board or other material between basement walls to reduce heat loss. The basement becomes part of your building envelope, an essential step in improving home heating and cooling efficiency. 

The basement walls can account for 25% of total energy loss throughout the home if not appropriately insulated. This is because basement walls are not part of the exterior wall but instead separate the basement from other living spaces. 

Placing rigid foam boards in basement walls will help to keep your basement warm and dry, as well as improving the efficiency of your heating system! 

Why You Should Insulate Your Basement Walls Instead of the Ceiling

The basement is the bottom part of your house. This means it should be brought into the building envelope as much as possible. The basement is the basement and should not be forgotten.

Some benefits of basement wall insulation include:

– basement and overall home comfort 

– basement and overall home energy efficiency 

– basement noise reduction.

– Savings on energy bills.

Walls must be insulated throughout the entire depth of the walls to make a difference in your home’s overall insulation level. 

Why Fiberglass Batts Are Terrible Choices For Your Basement Walls

Fiberglass batts are a poor basement wall insulation because they lose R-Value over time, absorb moisture and fall out of place, and are also susceptible to moisture absorption. The fiberglass batt will compress under foot traffic too. 

Fibers can also be released from the basement insulation and travel into your air ducts, where they can cause respiratory problems. 

The basement insulation should be installed tightly against the basement wall to avoid air leaks. Fiberglass batts are not an appropriate basement wall insulation because they do not fit in tight spaces and will eventually fall out of place, exposing your basement walls directly to outside temperatures. 

Rigid foam boards offer a better option for basement insulation because they are not as susceptible to fiber release and provide better structural support for basement walls.

Every basement needs a proper insulation system that will keep it at the same temperature as the rest of your house, which is most effective with rigid foam boards. Fiberglass is vital in maintaining comfort levels upstairs but should only be used on interior basement ceilings (if at all) where they can’t be touched.

Fiberglass batts between joists in your basement will cause heat loss and pose risks to home health as fiberglass can absorb water or fall out of place, resulting in a decrease in insulation performance. Rigid foam boards do none of these things.

The basement’s importance when it comes to insulation isn’t just about R-Value either, but also moisture prevention. This means that because fiberglass absorbs water vapor from the air, it can’t do its job of preventing dampness on basement walls where humidity levels are very high in the basement.

Fiberglass batts are not an adequate solution to basement wall insulation and should only be used if you cannot get rigid foam boards.

Best Material For Insulating Your Basement Walls

Use rigid foam boards for basement insulation instead of fiberglass batts. The basement is one area where rigid foam boards should be used instead. They do not lose R-value or compress under foot traffic.

Rigid foam boards are a much better basement wall insulation because they do not lose R-Value over time, absorb moisture or fall out of place like fiberglass batts. Rigid foam board will remain rigid when walked on.

Insulating basement walls with rigid foam board is a great way to increase comfort and energy efficiency while ensuring your home stays healthy all winter long!

Some General Info

  1. Rigid foam boards are an excellent way to insulate basement walls
  2. Foam boards can be installed on the exterior or interior of your home’s foundation
  3. The best time to install rigid foam boards is when you’re also installing a new siding, roofing, or windows
  4. If installing on the interior of your house, make sure there’s plenty of ventilation and airflow so that moisture doesn’t build up in the insulation
  5. It’s important to seal all joints with caulk before installation for maximum effectiveness and energy efficiency 
  6. Rigid foam board insulation helps reduce heating and cooling costs by keeping cold drafts out in winter and hot air from escaping in the summertime; it also reduces noise pollution since sound waves bounce off instead of getting through 

How A1 Home Insulation Can Help 

Insulation is the key to a comfortable basement. As mentioned in this post, fiberglass batts are not recommended for basement insulation due to their lack of effectiveness and durability compared to rigid foam boards. A1 Home Insulation offers several different types of basement insulation services – including installation or retrofitting – that will help keep your basement cool year-round and quiet.

If you’re considering basement insulation, contact A1 Home Insulation to learn more! You can also visit the website for a free estimate. We offer fast service at an affordable price point with materials that will provide you the best basement insulation possible.


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