How to Fix a Broken Wooden Beam

Fixing a broken wood beam can save you the time and money it often takes to find a replacement, however, you should attempt such a repair only when damages are small. More specifically, according to "Popular Mechanics," you should try to fix the beam if it presents only "cosmetic blemishes." On the other hand, if the wood displays large cracks or significant warping, it is ideal to pitch the beam and replace it.

Work gloves
Dust mask
Safety glasses
600 to 800 grit sandpaper
Cyanoacrylate glue
Saw dust
Wood glue
Paint scraper
Saw horses (2)
Towel
Plastic tarp
Clamps

Instructions

- 1
  Slide on work gloves, a dust mask and safety glasses to protect your skin, lungs and eyes.
- 2
  Fix a hairline fracture in the beam. Sand the area with very fine (600 to 800 grit) sandpaper. Fill the fracture with low viscosity (or thin) cyanoacrylate glue, commonly referred to as super glue. If the beam is cracked on both sides, the thinner consistency will allow the glue to seep through to both sides of the fracture. Allow one hour for the glue to dry and repeat sanding.
- 3
  Fill holes left by old screws. Mix saw dust with wood glue. Pack the mixture into the hole. Smooth the hole with a paint scraper. Allow one hour for the glue to dry, then sand.
- 4
  Flatten wood with minor warps. Place the beam on top of two saw horses. Soak one or more bath towels with very hot water. Wrap the warped area of the beam with the towels. Wrap a plastic tarp around the beam to seal in the heat and moisture, making it pliable. Clamp the ends of the tarp to prevent heat from escaping. Allow the beam to sit for 60 minutes. Remove the tarp and towels from the beam. Place the beam on a hard, flat surface. Place weight plates on top of the beam to restore its flatness. Keep the weights on the beam for at least 48 hours before removing.

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