Plywood endgrain table top bowing

samedi 15 novembre 2014

Hi all,

I'm currently working on a Plywood table top for a coffee table. I had ripped numerous plywood strips about 35mm wide and turned them on their ends, then glued together into 2 halves approx 300mm wide x 1m long and then run through the thicknesser to get even thickness. End result being that the plywood endgrain becomes the surface of the table top.



All went well, and yesterday I laminated the two peices together to make the final width of the coffee table, an sanded it up beautifully! This morning I walk in to keep working, and I notice it has quite a noticeable bow in it along the grain of the plywood it's bending to create a bit of a tunnel when viewed underneath.



I have sprayed the concave side with a bit of water and turned it over with weights etc on it to flatten it and restore moisture a bit to the other side.



My question is - once this has worked (indeed, if it works ), should I be sealing this peice on all sides while this project is a Work in Progress to stop further bowing? i.e. does sealing a peice then stop any further moisture getting in/out so it stays as per the dimensions?



Just keen to know how others work when you are doing a project that goes over multiple days/weeks - are you all sealing stuff before you walk out the door for the day? If so, what to use for these non-final coats to simply keep the moisture in check?



Cheers,

Seb




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