glue up question

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Forum topic by BCO posted 07-30-2015 02:53 AM 979 views 0 times favorited 6 replies Add to Favorites Watch
View BCO's profile


7 posts in 903 days

07-30-2015 02:53 AM

Topic tags/keywords: question

Hi, I’m new to this forum and have a question perhaps someone can help with. I am working on a few projects, one is a wood tray I rabbeted the hardwood sides to hold the 1/4” plywood bottom. I made a few and glued the plywood into the rabbet. I like the added rigidity but wonder if this could be a future expansion / contraction issue.
Second project involves gluing oak flooring to a 3/4 birch ply base, cutting into a shape and edge banding it, with the same expansion / contraction concern.
The glue is titebond ultimate, the slower setting one.

6 replies so far

View distrbd's profile


2252 posts in 2317 days

#1 posted 07-30-2015 03:06 AM

Post a couple of pictures so those who want to help , can see what the projects look like.

-- Ken from Ontario, Canada

View DKV's profile


3940 posts in 2375 days

#2 posted 07-30-2015 05:05 AM

I’m with distrbd, let’s see some pix of what you’re doing. If the pieces are not too big you shouldn’t have any problems.

-- This is a Troll Free zone.

View jerryminer's profile


846 posts in 1312 days

#3 posted 07-30-2015 07:18 AM

Pics would help, but as a general rule, gluing plywood into a wood frame is fine. The plywood does not expand/contract like a solid wood panel would, and the frame parts are usually small enough in width (less than 4” or so) that everything is stable enough.

Oak flooring on plywood could be a different issue. It will depend a lot on the dimensions of the piece. If large enough and unsupported (as opposed to actual flooring where the plywood subfloor is fully supported by the framing structure underneath) the piece could warp due to the different expansion rates of the oak vs. plywood.

For a small piece, you could probably get away with it. You might, though, end up with some gaps at the joints between flooring boards.

-- Jerry, making sawdust professionally since 1976

View rwe2156's profile


2749 posts in 1351 days

#4 posted 07-30-2015 09:50 AM

Depends on width of what you’re making.
I usually figure on 1/16” per 12” of width, but it depends on wood, moisture content at time of build, season of year its built, etc.

But yeah, IMO the flooring glued down to plywood can be a problem.

-- Everything is a prototype thats why its one of a kind!!

View BCO's profile


7 posts in 903 days

#5 posted 07-30-2015 12:55 PM

Thank you all for the responses. The oak on plywood is a 24” circle, so rather small.

View a1Jim's profile


116804 posts in 3448 days

#6 posted 07-30-2015 01:40 PM

I agree with Jerry

-- Custom furniture

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