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Glued Down Hardwood (Concrete Subfloor)
Fix a hollow or creaky glued-down wood floor on concrete
When the adhesive under a glued-down hardwood or engineered floor lets go, the boards sound hollow and creak as they move. You can re-bond them from above without lifting the floor.
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How to fix it, step by step
- Find the hollow boards. Tap the floor and listen for a dull, hollow sound. Mark the area.
- Inject Injectafix Pro or Injectafix Easy Squeeze. Drill a 2mm hole (Pro) or 3mm hole (Easy Squeeze) and inject the adhesive into the void. Both contain the same flexible adhesive.
- Weight the boards and leave them 24 hours. Then fill the hole with a matching wood filler.
Frequently asked questions
Do I need to lift the boards?
No. The adhesive goes in through a small hole and re-bonds the board in place.
Is it safe with underfloor heating?
Yes. Injectafix is suitable for all types of underfloor heating.