Instead of boiling the hardwood logs, in this process they are kept at a low humidity level and dried slowly to draw moisture from the inside of the wood cells. The logs are then sawn in the same manner as for solid hardwood planks. This style of engineered hardwood has the same look as solid hardwood, and does not have any of the potential problems of "face checking" that rotary-peel and slice-peel products have, because the product is not exposed to added moisture. Denver Hardwood Floor Install
For example, moisture can be a factor, as variations in moisture can lead to gapping and warping. For this reason, installing hardwood flooring in full bathrooms is not recommended because of the fluctuating moisture levels. Follow manufacturer recommendations relating to moisture before selecting and installing hardwood. For more protection against moisture, use a moisture barrier.

Eliminate any problem spots to make the subfloor level. Sand minor humps down with a hand-held or orbital sander to make the subfloor level. To fill any dips or low spots, use a leveling compound (also known as floor patch). Mix up the compound according to package directions, fill in the dips, then pull your straight piece of lumber back and forth over the spot to flatten and level it with the rest of the subfloor.[7] Hardwood Floor
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