10-30-2018, 07:23 PM
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#1 (permalink)
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Not Doug
Join Date: Jun 2012
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How do I waterproof plywood?
I know there is Marine - grade plywood, but I would not know where to buy that, and I am trying to take care of this today. As I mentioned elsewhere, I started painting Mother's house in May, but most of the trim had dry rot, so trying to figure out how to replace it. The problem is that it is smaller than all the lumber that I bought, and I am not purchasing a planer to trim down larger pieces, and then never using any of that expensive equipment again.
I bought plywood of the proper thickness, and plan on trim to fit, but is there a proper way of waterproofing it, or will I be doing this again in a year?
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10-30-2018, 08:28 PM
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#2 (permalink)
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Corporate imperialist
Join Date: Jul 2011
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Probably dip it in Thompson water seal.
I trim around windows with poplar and thata how I water sealed it.
__________________
1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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10-30-2018, 10:12 PM
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#3 (permalink)
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Not Doug
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How about oil-based paint? That should not peel off like latex does.
You cannot paint over Thompson's and more of the original trim is still good than needs to be replaced, so I would rather make the new trim match the old.
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10-30-2018, 10:51 PM
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#4 (permalink)
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Human Environmentalist
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Dontcha have the original trim paint? Use that.
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10-30-2018, 10:59 PM
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#5 (permalink)
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Corporate imperialist
Join Date: Jul 2011
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Oil paint could work.
Only so long as the paint surface remains intact.
Once it gets a break or a crack develops, water gets in the plywood and causes it to delaminate.
You may be able to epoxy coat it.
__________________
1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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10-30-2018, 11:29 PM
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#6 (permalink)
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Not Doug
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I last painted the house ten years ago; if we still have that I doubt it is still good.
I did purchase paint back in May and hopefully all of it is still good.
Hopefully!
I read about oil-based paint and the writer seemed convinced that latex is better in every way.
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10-31-2018, 08:53 AM
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#7 (permalink)
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Corporate imperialist
Join Date: Jul 2011
Location: NewMexico (USA)
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Yeah I have used paint that was 6 or 8 years old.
Just take it to a hardware store and get it shaken real good.
__________________
1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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10-31-2018, 11:13 AM
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#8 (permalink)
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Human Environmentalist
Join Date: Aug 2010
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I've used 10 year old paint. Nice the previous owners/painters left the extra under the steps in the garage. I've patched and touched up quite a few things since buying in 2010.
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10-31-2018, 02:36 PM
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#9 (permalink)
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Not Doug
Join Date: Jun 2012
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Moderators, please change the title to "What is the oldest paint that you have used successfully?"
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The Following User Says Thank You to Xist For This Useful Post:
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10-31-2018, 02:47 PM
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#10 (permalink)
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Human Environmentalist
Join Date: Aug 2010
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LOL
I'm always veering off the topic. That's what I do.
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