Does anyone make a plywood that is tongue and groove on all sides? Not just make on one long side and female on the the other, but male on one long and one short and female on one long and one short. Loke a hardwood floor t&g

I can't seem to find anything

The Fife said:

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Never seen that before, but with a router you could make some.

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x2

All of the T&G decking I've seen or heard of is long side only. If you add your own, make sure you cut the T&G so it's self gaping or make sure you gap when installing for expansion.

maybe you can ask a carpenter to customize one for you? or some furniture designer

I went with what was available. Was buying 45 pieces and I'm not patient enough to cut it the way I want it myself.

Just curious, but why would it be needed? The sides of the plywood start and end on a joist so there would be no deflection there beyond the joist itself anyway.

Sprung dance floor.

Plywood resting on foam blocks not joists so the floor absorbs the shock or dancing instead of the dancers knees, shins, ankles etc.

I am having to do another layer of plywood running the opposite direction in order to negate the non t&g short sides.

Then on top will go an 80mil thick vinyl dance floor.

1400sf. Been at it for 2 days. I'm sore.

Mucho austin said:

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Sprung dance floor.

Plywood resting on foam blocks not joists so the floor absorbs the shock or dancing instead of the dancers knees, shins, ankles etc.

I am having to do another layer of plywood running the opposite direction in order to negate the non t&g short sides.

Then on top will go an 80mil thick vinyl dance floor.

1400sf. Been at it for 2 days. I'm sore.

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Didn't see that coming! Sounds like a really neat project!

Finished it yesterday. Will post pics here later today

Here's come pics. Had a little help from some of our dancers dads, but it was mostly just me. Took from Tuesday to Sunday with Thursday off.

This shows the separation the foam created between the concrete and first layer of drywall:


Here is what we did to each of those pieces of plywood. Ugh. 1400 sf of that:


Second layer of plywood going on:


It's getting there. Almost done with the plywood:


Whew, finally got the dance floor top layer down:

So it's concrete -> drywall -> chipboard -> foam -> plywood?

The Fife said:

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So it's concrete -> drywall -> chipboard -> foam -> plywood?

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Well, all depends on whether you're looking at it right side up or upside down!

The Fife said:

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So it's concrete -> drywall -> chipboard -> foam -> plywood?

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I think it's just concrete, foam, OSB, plywood, and vinyl.

I don't think that second layer was needed to keep the ends "down." You could have staggered the plywood panels so that an end would have been locked into place by the middle from the boards on either side. That is how you install T&G for flooring. Plus with the vinyl top, it would have added an extra layer to keep stuff from bouncing.