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Forum topic by Clint Searl posted 659 days ago 507 views 0 times favorited 4 replies Add to Favorites Watch
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Clint Searl

1365 posts in 944 days


659 days ago

I’m going to lay a 3/4×5 T&G Heart Pine floor on a radiant slab, and want to glue it directly rather than over an underlayment and/or floating. The slab is dry as a bone and the ambient humidity never exceeds 35% (NM). I would appreciate hearing about any similar experience. TIA

-- Clint Searl.............We deserve what we tolerate


4 replies so far

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IsaacH

128 posts in 680 days


#1 posted 659 days ago

I glued down a bamboo when I moved into my house 2 years ago. I learned alot about slab moisture due to bamboos reaction to any humidity. What I learned is its not the ambient humidity but rather humidity coming from the ground underneathe the slab. Im assuming it dose rain atleast occasionally in NM. Its hard to get a slab perfectly moisture proofed. Water from the ground around the slab can migrate under the slabs edges. I had to use a special urethane based glue that created a waterproofing layer. It was kind of pricey and very stiff to spread. I had a hard time walking the next day after gluing 500 sqft.

-- Isaac- Decatur, GA - "Your woodworking....NOT machining parts for NASA!!!"

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Clint Searl

1365 posts in 944 days


#2 posted 659 days ago

Isaac, thanks for the info. I’m sure the slab won’t be wicking any moisture, and I plan to use a urethane adhesive. My main concern is if there are any issues associated with gluing it to a radiant floor.

-- Clint Searl.............We deserve what we tolerate

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Moron

4666 posts in 2477 days


#3 posted 659 days ago

depends on how the floor is done

if the tubing is buried in a concrete slab then I would not recommend using solid flooring period. Most use an engineered flooring as it wont buckle and warp.

Thats a no no in my books

-- "Good artists borrow, great artists steal”…..Picasso

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Clint Searl

1365 posts in 944 days


#4 posted 658 days ago

Moron, the previous owner installed the same pine flooring in another room at least five years ago, and the radiant heat in the slab has not been an issue. The boards have not buckled, cupped, or warped. I don’t know if it’s glued or floating.

-- Clint Searl.............We deserve what we tolerate

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