Cupping panels

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Forum topic by pyromedic602 posted 11-21-2008 09:51 PM 1235 views 0 times favorited 3 replies Add to Favorites Watch
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164 posts in 3714 days

11-21-2008 09:51 PM

Topic tags/keywords: question

I am sure that you all have answered this question many times but please bear with me. I have glued up several panels for projects and have always had difficulty with the pannels trying to cup. I have tried cutting boards to 3-4 inch withs before gluing and flipping the end grain to try an equalize/relieve the stress but I always get some cupping. I also try to not put to much clamping pressure on boards Just enough to get a smal amount of squeeze out. What am I doing wrong or what do I need to do in addition to ensure that my panels are flat when I take them out of the clamps.

-- Pyromedic602, free wood is always good wood

3 replies so far

View Catspaw's profile


236 posts in 3781 days

#1 posted 11-21-2008 10:43 PM

If I glue up a solid wood panel I always glue up hit and miss planed material. After it has done what it wants to do, I plane it to thickness. If your planer isn’t wide enough, glue up sections, then plane, then glue up final, deal with what’s left. Or find a woodshop with a wide planer.

-- arborial reconfiguration specialist

View Thos. Angle's profile

Thos. Angle

4444 posts in 3928 days

#2 posted 11-22-2008 12:13 AM

Check your saw and jointer for square. I have good luck hand planeing the adjoining edges at the same time. I also always use cauls over the top and bottom of the panel to keep it flat.

-- Thos. Angle, Jordan Valley, Oregon

View rhchampagne's profile


8 posts in 3442 days

#3 posted 11-25-2008 05:22 AM

I agree, after you joint the edge, is it square to the face? Are the faces of the panels flat? Even if you clamp with cauls if your edges or faces are not square you can get cupping.

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