Repair Trim Rot (Skirt Board and Corner Board)

Introduction

This tutorial will guide you through the process of repairing rot in exterior trim, specifically skirt boards and corner boards. Trim rot is a common issue, often caused by water exposure or inferior materials. By following these steps, you can effectively replace damaged areas of trim and prevent future rot.

Step 1: Identify and Mark the Rotted Areas

• Inspect the trim to locate the rotted sections.
• Use a combination square or speed square to mark new cut lines around the rot.
• Ensure your lines are perpendicular to the trim for a clean cut.

Step 2: Cut Out the Rotted Trim

• Equip your oscillating multi-tool with a wood blade.
• Carefully cut along the marked lines. Start by edging the line, then sweep the blade up and down to clear dust and deepen the cut.
• Check your cuts with the square to ensure they remain perpendicular.

Step 3: Remove the Rotted Pieces

• Use a utility knife to cut any caulk lines that may be adhering the rotted trim.
• Gently pry the rotted pieces away using a five-in-one painter's tool and a claw hammer.
• Be cautious not to damage surrounding materials like siding or gutters.

Step 4: Clean Up

• Remove any remaining nails using a nail puller. This ensures a flush fit for the new trim.
• Bend down any exposed brads to avoid injury.

Step 5: Prepare for Replacement

• Seal the exposed end grain of the cut areas with silicone or acrylic caulk to prevent moisture absorption.
• Measure the replacement trim piece by hooking the tape measure onto the existing trim and noting the length required.

Step 6: Cut the Replacement Trim

• Transfer the measurement to the new pine trim board, marking it with a crows foot for precision.
• Cut the piece to size using a miter saw.

Step 7: Back Prime the Replacement Trim

• Apply a paint plus primer to the back and edges of the replacement board. This helps protect against future moisture issues.

Step 8: Install the Replacement Trim

• Test fit the replacement piece to ensure it sits flush with the surrounding trim.
• Secure it in place using galvanized brads, applying them in a W pattern for even distribution (12 to 15 brads recommended).

Step 9: Repeat for Corner Board

• Measure and cut the corner board using the same process as the skirt board, ensuring to use treated wood for durability.
• Install the corner board in a similar fashion.

Step 10: Finish with Caulking and Painting

• Caulk all seams and fill in nail heads with caulk.
• Once dry, sand the seams lightly with 180-grit sandpaper to prepare for painting.
• Apply two coats of exterior-grade paint, ensuring to overlap the seams between new and old trim for a seamless finish.

Conclusion

By following these steps, you can effectively repair rot in your trim and protect your home from future damage. Regular inspections will help catch rot early, ensuring your repairs remain primarily cosmetic and prevent deeper structural issues. Check out additional resources or related videos for more home repair tips and techniques.