I built a mahogany table with a 60" round top back in the summer for our church. It has recently turned off cold with low humidity and the top is curling down on the sides. It has a piece of round plate glass laying on top of it to protect the surface, and the mahogany top has curled down on either side perpendicular to the direction of the boards as much as an inch on either side. I am planning to take the top off and gradually clamp it down to straighten it, hopefully without breaking it, and then add two additional braces to the bottom to try to hold it flat. I put two braces on the bottom when I built it hoping to prevent warping from occurring. I am also planning to put more coats of finish on the bottom to equalize the amount of moisture the bottom and top absorb. I originally put 3 coats of Barkley's gel varnish on the top and one coat on the bottom. Any thoughts on whether the glass on top, which is held off the actual wood by small round spacers, is causing the problem, or recommendations on how to straighten the top and prevent this from happening again? Any and all help would be greatly appreciated.
- posted
19 years ago