polyurethane, countertop (by J [FL]) Oct 23, 2021 8:46 AM
polyurethane, countertop (by Sisco [MO]) Oct 23, 2021 9:53 AM
polyurethane, countertop (by Jason [VA]) Oct 23, 2021 9:56 AM
polyurethane, countertop (by Jason [VA]) Oct 23, 2021 9:58 AM
polyurethane, countertop (by Robert J [CA]) Oct 23, 2021 12:12 PM
polyurethane, countertop (by DJ [VA]) Oct 23, 2021 1:33 PM
polyurethane, countertop (by J [FL]) Oct 23, 2021 2:04 PM
polyurethane, countertop (by Nellie [ME]) Oct 23, 2021 3:24 PM
polyurethane, countertop (by J [FL]) Oct 24, 2021 7:43 AM
polyurethane, countertop (by don [PA]) Oct 24, 2021 1:18 PM
polyurethane, countertop (by J [FL]) Oct 24, 2021 1:40 PM
polyurethane, countertop (by MikeA [TX]) Oct 24, 2021 4:58 PM
polyurethane, countertop (by Nellie [ME]) Oct 24, 2021 9:28 PM
polyurethane, countertop (by J [FL]) Oct 25, 2021 9:55 PM
polyurethane, countertop (by Dodge [PA]) Oct 26, 2021 6:47 PM
polyurethane, countertop (by J [FL]) Oct 27, 2021 8:01 AM
polyurethane, countertop (by J [FL]) Posted on: Oct 23, 2021 8:46 AM Message:
I have the materials and I will be building my plywood countertop soon.
I am planning to put several coats of polyurethane on the underside of the countertop, and on the rear edge where the countertop will meet the back wall. For protection against water.
Is it also necessary to coat the areas that will be covered with laminate sheet? I've watched several DIY videos on this and no one has done that. Is it a possibility for water to get under the laminate sheet once its been set with contact cement?
Thanks.
--72.188.xxx.xxx |
polyurethane, countertop (by Sisco [MO]) Posted on: Oct 23, 2021 9:53 AM Message:
No need for poly under the contact cement. I think that your time will be better spent getting the slope of your top correct than waterproofing it. It shouldn’t ever be wet underneath. --149.76.xxx.xxx |
polyurethane, countertop (by Jason [VA]) Posted on: Oct 23, 2021 9:56 AM Message:
I’d agree with water proofing the underside above the dishwasher area, but the whole thing? Nah. Just make sure to use a quality plywood and not OSB and it will be fine. --172.58.xxx.xxx |
polyurethane, countertop (by Jason [VA]) Posted on: Oct 23, 2021 9:58 AM Message:
Or better yet, use advantech plywood, which is water resistant already. --172.58.xxx.xxx |
polyurethane, countertop (by Robert J [CA]) Posted on: Oct 23, 2021 12:12 PM Message:
I chuckle each time I see someone using OSB board instead of weather rated plywood. --47.155.xx.xxx |
polyurethane, countertop (by DJ [VA]) Posted on: Oct 23, 2021 1:33 PM Message:
I agree to only waterproof the dishwasher area, because it can get damp from steam there.
I've never heard of - and never done it - to seal the plywood before contact cement/laminate. It always works fine. But do sand it nice and smooth. --68.229.xxx.xxx |
polyurethane, countertop (by J [FL]) Posted on: Oct 23, 2021 2:04 PM Message:
Thanks. This is plywood not OSB. --172.58.xxx.xxx |
polyurethane, countertop (by Nellie [ME]) Posted on: Oct 23, 2021 3:24 PM Message:
You do NOT want to seal the laminate side with polyurethane. The bond of the contact cement will not hold as strongly to the finished surface as to the plywood. The plywood will allow some of the glue to be absorbed, creating a stronger bond. --76.179.xxx.xx |
polyurethane, countertop (by J [FL]) Posted on: Oct 24, 2021 7:43 AM Message:
Thanks again. Yeah I was definitely not looking forward to doing the entire underside and now I will only do the area under the dishwasher. Especially since I read you need four full coats for waterproofing, with drying time in between. It would have been a royal pain. --72.188.xxx.xxx |
polyurethane, countertop (by don [PA]) Posted on: Oct 24, 2021 1:18 PM Message:
Seal around the edge of the cuts. That is where any water damage will do the fastest damage. --73.141.xxx.xxx |
polyurethane, countertop (by J [FL]) Posted on: Oct 24, 2021 1:40 PM Message:
Thanks Don. With clear silicone? --172.58.xxx.xxx |
polyurethane, countertop (by MikeA [TX]) Posted on: Oct 24, 2021 4:58 PM Message:
The worst place for water infiltration is the sink cutout and at the corner's where two pieces meet. I always apply a generous coating of silicone on the wood and let it hang down as a sort of drip edge.
You could just use paint instead of polly, the dry time will be much shorter and there shouldn't be any significant difference in wood protection since it isn't exposed to the sun. --209.16.xx.xxx |
polyurethane, countertop (by Nellie [ME]) Posted on: Oct 24, 2021 9:28 PM Message:
I like to use the metal heat tape above a dishwasher for moisture protection. Combined with the polyurethane it would be quite effective, I think. --76.179.xxx.xx |
polyurethane, countertop (by J [FL]) Posted on: Oct 25, 2021 9:55 PM Message:
Thanks again.
The paint option might be better. Then I could return the two cans of polyurethane for a refund. --72.188.xxx.xxx |
polyurethane, countertop (by Dodge [PA]) Posted on: Oct 26, 2021 6:47 PM Message:
Perhaps marine plywood? --174.249.xxx.xx |
polyurethane, countertop (by J [FL]) Posted on: Oct 27, 2021 8:01 AM Message:
On one of the videos I watched, the person said to put two coats of contact cement on the plywood because the plywood will absorb the first coat. Is this true? --72.188.xxx.xxx |
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