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Forum topic by BoomerPapa posted 02-14-2018 03:53 PM 393 views 0 times favorited 6 replies Add to Favorites Watch
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BoomerPapa

2 posts in 274 days


02-14-2018 03:53 PM

Topic tags/keywords: resource

I am pursuing my first foray into making a wood and concrete table. My concern is the propensity of wood to rot when in contact with concrete. I have some ideas of using a decorative strip of acrylic plastic between them, but was wondering if there is a brushable finish that would create a sufficient barrier. Thanks in advance.


6 replies so far

View Lazyman's profile

Lazyman

2559 posts in 1559 days


#1 posted 02-14-2018 04:05 PM

Is it going to be outside? A little more information about the design would be helpful (wood top, concrete legs, or wood legs with concrete top, etc.). If the table won’t be out in the weather, rot should not be a problem. The type of wood makes a difference as well.

-- Nathan, TX -- Hire the lazy man. He may not do as much work but that's because he will find a better way.

View John Smith's profile

John Smith

1431 posts in 335 days


#2 posted 02-14-2018 05:06 PM

like LM said: not nearly enough information for any accurate replies.

freshly poured concrete (less than 45 days) will retain heaps of moisture
that will condensate and cause mold and mildew in just about any wood.
some kind of plastic barrier is STRONGLY recommended between the wood and concrete.
all building codes specify a foam barrier between wood and concrete – even pressure treated wood.
check the DIY concrete videos on YouTube.

lay a piece of plywood on a raw garage floor and see what happens.

-- I started out with nothing in life ~ and still have most of it left.

View Snipes's profile

Snipes

194 posts in 2417 days


#3 posted 02-14-2018 09:28 PM


lay a piece of plywood on a raw garage floor and see what happens.

- John Smith


What???

-- if it is to be it is up to me

View BoomerPapa's profile

BoomerPapa

2 posts in 274 days


#4 posted 02-14-2018 09:49 PM

Thanks to all for the responses so far. 1. The table will not be outdoors. 2. The wood will be walnut. 3. The legs will be wood, but are not intended for contact with a concrete surface. 4. I very much agree there must be a barrier between the wood and concrete. What I am looking for is whether there is a product that can be brushed onto the wood (A friend recommended Geocel 2310 or a good Silicone caulk carefully covering all wood areas where it would be exposed to concrete. 5. The concrete will be no more than 1/3 of the overall table surface. 6. The thickness of the concrete will be 2” and reinforced with glass fiber. 7. The concrete will be in the center of the table with live edge wood slabs facing out on either side. 8. The concrete and walnut will be stabilized using 1/2” threaded rod held in place by epoxy on the wood and with the concrete forming over the threads as it is poured & sets.

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Snipes

194 posts in 2417 days


#5 posted 02-15-2018 12:48 PM

inside table, you will have no issues with wood touching concrete..

-- if it is to be it is up to me

View Tennessee's profile

Tennessee

2887 posts in 2687 days


#6 posted 02-15-2018 01:08 PM

This young woodworker did one. Here is his video – might save you some steps and avoid his mistakes.
https://www.youtube.com/watch?v=dLri5sLLmJ0

-- Tsunami Guitars and Custom Woodworking, Cleveland, TN

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