If you've got installed solid wood flooring and you’re finding that it’s bulging and lifting within the middle of your room, you’re not alone. Solid wood flooring which bulges and lifts within the middle of rooms is, unfortunately, a comparatively common problem. More often than not, the basis of the matter lies with the initial installation of the solid wood flooring. Wood, as you're aware, maybe a completely natural product and intrinsically expands and contracts with changes in atmospheric conditions. It's for this reason that solid wood flooring needs an expansion gap. If solid wood flooring is fitted without an expansion gap, problems, which may sometimes be severe, are likely to arise.
Wrong trowel size
The size of your trowel must match the dimensions of the tile. The larger the tile you're using, the deeper the thin-set must be. To create the deeper thin set you would like a trowel with deep notches. The deeper notches leave adjusting while laying tile. Make sure the thin-set you purchase has phrasing like “large tile” or “large format” thereon. This thin-set is thicker and holds the larger tiles. As a general rule, a half-inch trowel works for tiles up to 16 inches. Tiles bigger than this need a 3/4 inch notch.
Remember that you simply will undergo your thin-set faster because you're using more. A 50-pound bag should cover a 40 to 50-foot square employing a 1/2 inch notch. that very same 50-pound bag should cover a 30 to 40 sq ft employing a 3/4 inch trowel.
A moisture imbalance within the wood causes the boards to curve with the sides being above the middle. This will be caused by ambient moisture or moisture under the flooring which causes the boards to expand. If insufficient room was left between boards for expansion, cupping occurs because the edges of the expanding boards are forced upwards.
Crowning occurs when the middle of the ground is above the sides. This is often caused when flooring absorbs ambient moisture and expands beyond the space provided during installation. With no place to travel, the expanding boards push up within the middle. Crowning is common on cupped flooring which has been sanded before it's properly acclimated to the ambient atmosphere within the home. New boards tend to possess more moisture and this might end in cupping, but when those boards dry, the sanded edges shrink even further, leaving the middle raised.
An extreme sort of cupping, buckling usually only occurs after flooding or when the moisture difference between subfloor and flooring is just too great at the time of installation. The flooring expands to such an extent that the boards shy away from the sub-flooring. This usually requires reinstallation.