Many door manufacturers build “engineered” doors which are actually not “solid” hardwood, but rather a ‘Stave Core’ with a thin layer of hardwood glued on the outside.
While this type of door does have some advantages, notably the cost and the fact that some types are insulated, they also have distinct disadvantages — especially that the thin outer ‘skin’ often detaches itself from the interior wood core. It also dents quite easily and cannot be repaired. Plus this type of door can usually only be refinished twice.

These doors are extremely difficult to detect once stained and varnished. Usually the only way to make sure is to remove it and strip/sand either the top or bottom.

Refinishing this type of door is complex and more time consuming because one has to be extremely careful not to sand through the thin outer veneer, and, they often will not “take” the stain or varnish as well as a piece of solid wood.

Consequently they are not nearly as good an investment as a door constructed from solid pieces of thick, properly dried hardwood, which if well maintained should last a lifetime. |

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