The precise method for repairing cracked wooden stair treads
In short: When a wooden step cracks, you don't always need to replace the entire unit. General contractor Tom Silva demonstrates a professional-grade repair technique using dowels and specialized adhesives to restore structural integrity.
The repair process focuses on reinforcing the crack from the inside out. By using a tapered drill bit to bore holes into the tread, you can insert tapered wood dowels. These dowels act as internal anchors that bridge the break.
To ensure a permanent bond, carpenter's glue is injected into the crack using a syringe. After the glue sets, any protruding dowels are filed flush with the surface using a flat file, and excess glue is wiped away with white cotton cloth.
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Sources
- Summary by Intellect · source: How to Repair a Broken Stair Tread | This Old House
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