Rim Joist Insulation: Options For Your Home

Understanding Your Rim Joist

Now that the terribly cold weather has fully set in, a lot of homeowners are struggling to keep the cold air out. The Rim Joist is one of those areas that is a large source of energy loss with an opening for winter air to come in. It is where the basement ceiling framing and home siding meet above the foundation wall. Typically, this is left vacant or stuffed with basic fiberglass batt insulation. The result of this can be felt through cold drafts and floors. Without proper insulation, you can say goodbye to the feeling of a comfortable home this winter.

Rim Joist Cold drafts
Cold air likes to seek through the cracks producing drafty rooms and cold floors.

The Rim Joist Insulation Options You Have

The Rim Joist Space takes a different approach to insulate correctly. While it may seem smart to stuff the area with fiberglass batt insulation, it will still allow air to creep through. Spray Foam Insulation, Foam Board, and Air Sealing are the three insulation services to go within the Rim Joist area. Read more below on how each type of insulation fully solves the cold room issue.

Insulation Options

  • Air Sealing: Because insulation does not stop air leaks, Air Sealing is very important. Air Sealing helps eliminate leaks and makes the home more comfortable and efficient.

  • Spray Foam Insulation: Spray Foam Insulation is one of the best options. Spray Foam is resistant to water, offers superior R-Value, and seals the air leaks all in one application. This insulation type expands to fill the holes and gaps, stopping air leakages in one simple step.

  • Rigid Foam Board Insulation: This type of insulation comes in form of a board and features a wide variety of thickness differences. Rigid Foam Insulation is perfect for achieving a higher R-Value, increasing the energy efficiency of the home, and pairs well with other insulation types.

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