Repair and Prepare Stair Structure

What happens in this clip

After removing the old railing, inspect the underlying stair structure for any damage, especially around the areas where the newel posts were previously anchored. The video indicates the stairs were in much worse condition than expected. Use wood filler or construction adhesive to repair any rotten, broken, or unstable wooden sections of the stringers, treads, or risers. A saw may be needed to cut away severely damaged wood before filling or patching. Ensure all repairs are solid and flush with the existing structure to provide a stable foundation for the new components.

Goal: Ensure the underlying stair structure is sound and ready for new components.

What's used

Tools

• Hammer
• Saw
• Utility knife
• Spreader/Applicator
• Scraper

Materials

• Construction Adhesive
• Expanding foam adhesive
• Wood Filler
• Epoxy wood repair compound
• holes
• and repairing damaged wood.

About the full video

This DIY project details a complete staircase renovation, transforming an old, worn-out staircase into a modern and elegant feature. The process involves the demolition of existing railings, structural repairs to the stairs, removal of old carpet and installation of new, and finally, the precise installation of new newel posts, oak handrails, and metal balusters. The project concludes with the addition of decorative caps, showcasing a significant aesthetic and structural upgrade in a relatively short timeframe.

Step 2 of 6: Inspect and Repair Staircase Structure

Examine all wooden components for signs of decay, insect damage, or structural compromise. Pay close attention to the areas where treads meet stringers and risers. Any loose connections should be re-secured with screws or construction adhesive. Damaged sections may require patching or replacement with new wood. Ensure the sub-treads are level and sound. If the sub-treads are in poor condition, they may need to be replaced or covered with a plywood layer.

Open this step in the guide

Every video in How to Modernize a Dated Staircase with Rails, Lights and Treads

1. Step 1: Remove Old Treads and Risers

   • 1:39–2:35 Cut Tread Fasteners & Remove Old Treads
   • 0:01–0:09 Remove Old Carpet and Treads
   • 0:05–0:08 Remove Old Stair Components

2. Step 2: Inspect and Repair Staircase Structure

   • 0:00–0:13 Assess Existing Stairs and Planning
   • 0:09–0:14 Repair and Prepare Stair Structure (this video)
   • 3:59–6:57 Replace Damaged Stair Treads or Risers

3. Step 3: Install New Treads and Risers

   • 6:45–8:03 Install New Treads and Secure with Shims/Glue/Nails
   • 9:53 Install New Treads
   • 0:06–0:09 Install Treads and Risers

4. Step 4: Install New Balusters and Handrails

   • 5:36–6:05 Install Balusters and Handrail
   • 0:23–0:31 Install Oak Handrails and Metal Balusters
   • 3:35–4:17 Install Balusters and Fillets

5. Step 5: Sand and Finish Treads and Handrails

   • 0:20–0:25 Sand and Finish Treads
   • 0:37–0:45 Sanding the Stairs for Smoothness
   • 0:15–0:17 Sand the Stairs

6. Step 6: Install Stair Lighting (Optional)

   • 0:01–0:04 Apply LED Strip Lights to Treads
   • 7:31–9:55 Install LED Lighting and Treads
   • 0:00–0:19 Install Flexible LED Strip Lighting