If you live in an older house, you're probably accustomed to hearing creaks and strange noises. While the ceilings may droop and floors naturally may sag as homes age, some cases may be more serious than others. If your floors weaken, it is important to reinforce them before purchasing large pieces of furniture, such as a grand piano. One solution is to reinforce the floor.
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Walk on and test the floor to see if you have a hollow or weak spot. Use a chisel and hammer to expose the subfloor if you notice a weak area.
Inspect and assess the floor's condition. You likely need to add existing framing to the room and should call a professional if your home is more than 50 years old. You can likely reinforce the floor by adding an extra layer underneath your flooring if your home is less than 50 years old.
Cut a piece of 1/2-inch thick plywood measured to the dimensions of your floor.
Remove the outer flooring carefully with prybar. Avoid damage the outer floor so that it can be reused to save yourself the hassle and expense of procuring new flooring for the area.
Double the joists, or beams, underneath your outer floor layer, which is a process called sistering, Cut floor joists that are the same length as existing joists. Secure the two layers together with nails or bolts.
Place the pre-cut plywood over the doubled floor joists. Secure the plywood with screws and a screw driver.
Re-lay the outer flooring. Attach the flooring to the subfloor. Use a hammer and nails or a screwdriver and screws to attach the flooring using the existing nail holes.
Walk on and test the flooring before placing a grand piano onto the reinforced floor. The sound of reinforced flooring sounds flat, not hollow, and you won't hear any squeaks when body weight or smaller pieces of furniture are placed on the reinforced area.
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