Can I use old plywood?

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Forum topic by Sandra posted 656 days ago 978 views 0 times favorited 12 replies Add to Favorites Watch
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4284 posts in 709 days

656 days ago

Good evening all,
I’m out of province visiting my mother in law, missing my shop and laptop!
There are several pieces of 3/4 ” plywood in her basement. It’s been stored flat, off the ground in a heated area. I’m guessing it’s 30 yrs old at the very least. Provided its not warped or decayed, is there any reason not to use it?
I’m planning on building a cart for my planer using 3/4 ply.

-- No, I don't want to buy the pink hammer.

12 replies so far

View yrob's profile


340 posts in 2286 days

#1 posted 656 days ago

Why not ? What could possibly go wrong (famous last words..)

-- Yves

View patron's profile


13018 posts in 1974 days

#2 posted 656 days ago

probably better than anything made today sandra

check the edges for de-lamination

sounds like a good score

-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle

View pmayer's profile


566 posts in 1699 days

#3 posted 656 days ago

if it looks ok i’m sure it will be fine.

-- PaulMayer,

View racerglen's profile


2295 posts in 1414 days

#4 posted 656 days ago

Go for it, I have used 40 year old stuff my dad had, marine grade,
made an nice replacement wheel for his bandsaw..kinda says
something about holding the lamination eh ?

-- Glen, Vernon B.C. Canada

View Lifesaver2000's profile


512 posts in 1746 days

#5 posted 656 days ago

I have a few small pieces of A/C grade plywood still left from a project I did about 30 years ago and it is still good when I saw into it. And the stuff is actually 3/4 of an inch, not 23/32 or some other weird size.

View Monte Pittman's profile

Monte Pittman

13826 posts in 971 days

#6 posted 656 days ago

I agree with the better than today’s philosophy

-- Mother Nature created it, I just assemble it. - It's not ability that we often lack, but the patience to use our ability

View gfadvm's profile


10737 posts in 1323 days

#7 posted 656 days ago

I have used lots of old ply. If it has areas of delamination along the edges, just squirt a healthy dose of wood glue in the gap, clamp, and you’ve saved it.

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

View yrob's profile


340 posts in 2286 days

#8 posted 655 days ago

Today I was at the BORG to get some plywood. Found several sheets that already had delaminations in them with significant gaps. You would think that at least when its new it ought to be in good shape but no.

-- Yves

View a1Jim's profile


112016 posts in 2210 days

#9 posted 655 days ago

What can it harm to try and use it ,go for it.

-- Custom furniture

View crank49's profile


3378 posts in 1604 days

#10 posted 655 days ago

I have seen mold cause plywood to delaminate, but otherwise, just the age won’t make it break down in my experience.

-- Michael :-{| “If you tell a big enough lie and tell it frequently enough, it will be believed.” ― A H

View Sandra's profile (online now)


4284 posts in 709 days

#11 posted 654 days ago

Dang. Thought I was going to come home with some good 3/4 plywood, but when it was all said and done, none of the pieces were more than 7” wide at any point. I did come across a nice little combination square though that my mother-in-law didn’t want.

In the past few years, I’ve been helping her clean out parts of her house, and have found some doozies. Last time I cleaned out a basement closet I found a four shot .22 pistol in a bread bag, bullets included. She didn’t even know it was there. I had to have yet another conversation with my kids about safety at Grandma’s house….

Glad to be back home tonight.
Never a dull moment.

-- No, I don't want to buy the pink hammer.

View MonteCristo's profile


2095 posts in 822 days

#12 posted 654 days ago

With plywood, the older the better. With every passing year they are using poorer and poorer logs to make plywood.

-- Dwight - "Free legal advice available - contact Dewey, Cheetam & Howe""

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