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28 votes
Accepted

Will adding another layer of plywood improve shed floor bouncing?

Normal plywood has the wood fibers in its outer plies oriented along the 8 ft length of the plywood. There exists specially marked plywood that defies this convention, but from your photo it's clear ...
popham's user avatar
  • 10.4k
12 votes
Accepted

Is it normal to see light between the plywood on a roof deck?

There is actually a requirement that the plywood sheets are not tight against each other. The normal spacing is about 1/8 inch or the thickness of a nickel. Some installers use Plywood clips to keep ...
RMDman's user avatar
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5 votes

Sanding down uneven ply strips

If it's taking too long with a belt sander, you need a coarser grit. Since you self-identify as a bad DIY-er, beware that you can do a lot of damage in a hurry with coarse grit in a belt sander. Get ...
Ecnerwal's user avatar
  • 220k
5 votes

Adding plywood flooring to attic

It's very, very likely that your garage roof structure is not designed to support any additional loads on the lower members (truss chords or rafter ties. Truss chords in this case, evidently from what ...
Ecnerwal's user avatar
  • 220k
4 votes

Can an MDF platform support washing machine load at corners?

I'd want to look at the details of the tops of the spring posts, how they attach to the shelf, and whether they can be positioned directly under the machine's feet. But MDF really doesn't like getting ...
Chris H's user avatar
  • 6,701
4 votes
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Pocket hole disaster! What am I doing wrong?

I'm not familiar with that jig but did a quick google search to take a look. Is it this one? First, you need to set the depth on the jig to the thickness of the board. Measure the thickness, don't ...
LarryBud's user avatar
  • 789
4 votes

1/4 plywood between existing floorboards and new hardwood?

I specialize in fixing old houses and I'm currently working on one built 1837. Yes, everybody prefers the old boards, but what most people don't understand is that at some point they will reach the ...
Cheery's user avatar
  • 6,899
3 votes

plywood load-bearing capacity: a stack of several thin ones compared to one thick one

21mm (~13/16") plywood will carry a person up to say 200 lbs. reliably in a sheet that size (about 40x60 inches for the Yanks), assuming proper edge support. The question is one of flex. You ...
isherwood's user avatar
  • 141k
3 votes

1/4 plywood between existing floorboards and new hardwood?

I had a wood floor in a house - 90 years old then. Boards worn like you describe, we used an 18" drum sander, first diagonal with coarse paper then other diagonal with smoother paper. After that ...
Solar Mike's user avatar
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2 votes

Gluing laminate to plywood

Addressing the gluing-to-plywood question, once you get the "laminate wood" dried: If I understand correctly, you want to make an interior door with a plywood core and a laminate wood face. ...
Triplefault's user avatar
  • 8,042
2 votes

Can I plane down the underside of 3/4" subfloor to match my existing 5/8"?

What I would do is glue down some 1/8" hardboard over top of the existing subfloor. That would bring the floors flush. $15 per 4'x8' panel at HD, so not too pricey.
Huesmann's user avatar
  • 3,910
2 votes
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Can I plane down the underside of 3/4" subfloor to match my existing 5/8"?

Your new subfloor does not have to be T&G. It may be preferred if it is a large area, but if it is a few pieces, the gaps between the regular plywood can be backed up with scraps of 5"wide ...
Jack's user avatar
  • 35.7k
2 votes

plywood load-bearing capacity: a stack of several thin ones compared to one thick one

Your concerns with the thickness of the plywood are misdirected. A 21mm thick piece of plywood would be able to carry the weight of as many adults that could fit on a 1m x 1.6m slab. Therefore it will ...
RMDman's user avatar
  • 32.3k
2 votes

I want to close my back deck in and make a l laundry room can I lay plywood over the deck wood the wood is still in good shape

Yes, you can lay the plywood over the decking. The decking is a legitimate subfloor, and your plywood can be categorized as underlayment. The deck boards themselves are good for their own self weight ...
popham's user avatar
  • 10.4k
2 votes

Side of Vanity Underneath has separated From the Rear

It's either poor quality, or badly stressed by not sitting on the floor properly to support it, or both. You should look for and address improper floor support to have the repair attempt last. I ...
Ecnerwal's user avatar
  • 220k
2 votes

How to prep small piece of plywood for wall paint

Plywood isn't the best stuff to use to get that "as much like a wall as possible" smooth look. It will be very hard to make the plies disappear behind the paint: the plies will telegraph ...
Triplefault's user avatar
  • 8,042
1 vote

Spacing between shelf brackets for 1/4 inch plywood and light load

Take your longest piece of leftover 1/4", balance it between two chairs, drop your cat in the middle and see what happens. If you don't like the result, move the chairs closer til you do. Tack ...
jay613's user avatar
  • 40.5k
1 vote

Spacing between shelf brackets for 1/4 inch plywood and light load

"Reasonably" and "safely" aren't really at play here. Both are highly subjective. It also depends on the type and quality of the plywood. Rough construction plywood is very ...
isherwood's user avatar
  • 141k
1 vote

Sanding down uneven ply strips

I agree with other answers about coarser grades, but remember that the plywood layers are quite thin, so depending how uneven the new piece is, you may risk going through some. It also sounds like you’...
simon coleman's user avatar
1 vote

Sanding down uneven ply strips

Basic rule Always grind in the direction of wood grain, not across. You might want to try 80 grit, and go up or down in grit depending how much it removes.
Traveler's user avatar
  • 17.9k
1 vote
Accepted

How to prep small piece of plywood for wall paint

Probably doesn't matter too much what the specific primer is. You'll just want something that prevents the wall paint from soaking into the plywood and causing it to warp. I might suggest actually ...
Milwrdfan's user avatar
  • 4,912
1 vote

Loft Beds w/ Desks - Mattress Support?

Plywood: You want plywood that's sheathing. For 3/4" (or 23/32") it needs a span rating of 48/24. Plywood is what's called "anisotropic," where how you orient it determines its ...
popham's user avatar
  • 10.4k
1 vote
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Best ways to prevent the house from termites

So you used the word "Protect". I don't know if you have a current infestation. If you do, you will need to get a treatment, and midigate any severe damage. If you simply want to prevent ...
mreff555's user avatar
  • 1,287
1 vote

Best ways to prevent the house from termites

Professional treatment isn't that expensive, is a lot better controlled than this would be, and avoids having to handle toxic chemicals myself. Points for creativity, though...
keshlam's user avatar
  • 30.3k
1 vote

Best ways to prevent the house from termites

The pros bury bait traps every couple of feet in a ring around the property. They look a lot like pop-up sprinkler heads.
Sort of Damocles's user avatar
1 vote

How to treat beech plywood to be used as a desktop?

If you want heat reisitant clear paint try an auto-parts store or paint specialist. when I need a heat-proof surface for soldering I just use a large ceramic floor tile.
Jasen's user avatar
  • 21.6k
1 vote
Accepted

Extend Ikea wardrobes to ceiling - drywall, plywood, or?

For something very small and non-load bearing like this, a simple frame of 2x2 screwed together with some 3/8" drywall over it should be more than sufficient. The only reason to use 1/2" ...
FreeMan's user avatar
  • 47.4k

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