How to Replace Rim Joist

If you have noticed that your rim joist is rotten or damaged, it’s important to replace it as soon as possible. A rim joist is a wooden board that runs along the perimeter of your house on the top of the foundation. It supports the joists and acts as a barrier to prevent pests and moisture from entering your home.

Here’s a step-by-step guide on how to replace a rim joist.

Removing the Old Rim Joist

1. Identify the damaged area of the rim joist by inspecting the floor above it for any signs of sagging or bouncing.
2. Use a reciprocating saw to cut the rim joist in half at the damaged area.
3. Remove the damaged section of the rim joist using a pry bar and hammer.
4. Use a reciprocating saw to cut any nails or screws holding the rim joist to the foundation.
5. Remove any insulation or debris from the area.

Preparing for the New Rim Joist

1. Measure the length and width of the area where the old rim joist was removed.
2. Purchase a new rim joist that is the same size and type of wood as the old one.
3. Use a circular saw to cut the new rim joist to the appropriate length.
4. Sand the edges of the new rim joist to ensure a snug fit.

Installing the New Rim Joist

1. Apply construction adhesive to the bottom of the new rim joist.
2. Insert the new rim joist into the space where the old rim joist was removed.
3. Secure the new rim joist to the foundation with concrete screws or nails.
4. Attach the new rim joist to the existing joists using metal joist hangers.
5. Secure the new rim joist to the adjacent joist with screws or nails.

Key Takeaways

• Regularly inspect your rim joist for any signs of damage and replace it as soon as possible if necessary to prevent further damage to your home.
• Use the proper tools and safety equipment when replacing a rim joist.
• Measure twice and cut once to ensure a snug fit.

Replacing a rim joist may seem daunting, but with the right tools and know-how, it can be a manageable DIY project. By following these steps, you can replace your rim joist and ensure the structural integrity of your home.