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How To Join End To Edge Grain Maple Counter Top

 
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Old 04-09-2019, 04:59 PM   #1
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How To Join End To Edge Grain Maple Counter Top


I'm getting ready to install some Maple counter tops and am looking for some opinions on how to join the two pieces of the L counter top.

The joint is going to be within 8" of a drop in sink. I'm going to seal everything under the sink with a penetrating epoxy sealer which comes highly recommended by boat builders, as well as silicone under the rim of the sink. Client is aware they absolutely can't leave standing water on the top but you know how that goes. My main concern is what to use on the end to edge grain joint. Going to do mortise/loose tenon to add as much pull away strength as possible along with counter top connectors to pull them together, what type of glue or epoxy has anyone used with good results? Titebond III good enough with connectors and mortise/tenon? Considered polyurethane based glue (Gorilla or similar) but never used it for this type of thing.

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Old 04-09-2019, 06:44 PM   #2
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Re: How To Join End To Edge Grain Maple Counter Top


Id do an under mount sink. But Id either use epoxy to glue it up or titebond 3. You could use those countertop bolts or pocket screws to assist in the glue up. Maple
Moves a lot. Id put a couple coats of oil base poly and then 3 coats of something like Vermont natural coatings whey based poly.

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Old 04-09-2019, 06:45 PM   #3
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Re: How To Join End To Edge Grain Maple Counter Top


Is it going to be a floating joint similar to a breadboard end, or are you gluing it up solid?

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Old 04-09-2019, 07:02 PM   #4
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Re: How To Join End To Edge Grain Maple Counter Top


Normally that would be mitered so the two side of the joint move together. Butting one is begging for splitting.
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Old 04-09-2019, 10:18 PM   #5
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Re: How To Join End To Edge Grain Maple Counter Top


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Originally Posted by TRThomas View Post
I'm getting ready to install some Maple counter tops and am looking for some opinions on how to join the two pieces of the L counter top.

The joint is going to be within 8" of a drop in sink. I'm going to seal everything under the sink with a penetrating epoxy sealer which comes highly recommended by boat builders, as well as silicone under the rim of the sink. Client is aware they absolutely can't leave standing water on the top but you know how that goes. My main concern is what to use on the end to edge grain joint. Going to do mortise/loose tenon to add as much pull away strength as possible along with counter top connectors to pull them together, what type of glue or epoxy has anyone used with good results? Titebond III good enough with connectors and mortise/tenon? Considered polyurethane based glue (Gorilla or similar) but never used it for this type of thing.

Thanks CT friends.
Opposing grain will give you opposing movement and lead to issues... you're compounding the problem with a sink and edge 8" from the end of the top...

Since they're already cut and you can't miter them, only way I would do that one as is is treating it like a granite top... use levelers edge to edge, and using caulk to join the edges (no fasteners and you don't want any moisture getting between them) and secure the top to the cabinet with caulk as well... might allow for enough movement not to be an issue...

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Old 04-10-2019, 02:52 AM   #6
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Re: How To Join End To Edge Grain Maple Counter Top


I think the best chance of not having it split is to get the 2 pieces acclimated, glue it up, and coat every little bit of the wood with an epoxy finish. The other approach would be totally coat both pieces separately and let cure, then use a food grade caulk when you assemble.
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Old 04-10-2019, 06:57 AM   #7
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Re: How To Join End To Edge Grain Maple Counter Top


All 6 sides of each piece needs finished before joining the 2 pieces together. Then they need to be allowed to expand/contract independently. I don't see why ya couldn't join them with toggle bolts just like you would a laminate countertop. They'll hold the joint tight, but will allow for independent expansion/contraction so long as the slots for the bolts are oversized.
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Old 04-10-2019, 07:23 AM   #8
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Re: How To Join End To Edge Grain Maple Counter Top


Glue two inches of the front corner and toggle bolts or something that allows movement. Best would be a long dovetail joint
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Old 04-10-2019, 08:19 AM   #9
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Re: How To Join End To Edge Grain Maple Counter Top


Agree with sealing all sides with some type of epoxy and it will still move.

Best bet is to use expandable epoxy (something akin to G-flex or another brand I can't think of) and let the entire edge grain side float using something like powertecs or make your own if you want a longer tenon side. Most all your movement is going to come longitudinally. If one side is fixed and one side isn't then you have a chance.

Here's a decent article.

https://www.woodcraft.com/products/t...xoCDfsQAvD_BwE
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Old 04-10-2019, 09:44 AM   #10
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Re: How To Join End To Edge Grain Maple Counter Top


If you have enough budget, I suppose you could treat the whole thing with PEG and go from there. I'm not convinced you could get good enough penetration ...
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Old 04-10-2019, 10:29 AM   #11
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Re: How To Join End To Edge Grain Maple Counter Top


I'd slot cut spline the entire edge for snug spline, just short of visible front. Use dog bone bolts just at front and back. Do about 12" at center glued tight. That way front & back could expand, & only 12" at center would be subject to different rates of expansion due to grain change.

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