Attaching a Granite Top

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Forum topic by Bill Berklich posted 07-15-2018 02:53 AM 782 views 0 times favorited 8 replies Add to Favorites Watch
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Bill Berklich

1003 posts in 998 days

07-15-2018 02:53 AM

Topic tags/keywords: tip trick question granite top slab

Poling the wisdom of Lumber Jocks. I’ve made a base for a hall table and my wife wants a granite top on it. Any suggestion on how to attach a 3/4” granite slab (17”x 46”)?

-- Bill - Rochester MI

8 replies so far

View ShaneA's profile


7084 posts in 3208 days

#1 posted 07-15-2018 02:56 AM

Small dabs of silicone, and gravity.

View BurlyBob's profile (online now)


6920 posts in 2875 days

#2 posted 07-15-2018 02:56 AM

The guys who installed our countertops used silicon caulk. I’ve used it as an adhesive for a couple of projects. Once you put a slab that size and weight down it’s not going anywhere.

View woodbutcherbynight's profile


6054 posts in 3018 days

#3 posted 07-15-2018 03:02 AM

Small dabs of silicone, and gravity.

- ShaneA

+1 it works

-- Live to tell the stories, they sound better that way.

View oldnovice's profile


7517 posts in 3977 days

#4 posted 07-15-2018 05:15 AM

You have reached a quorum as I have used it with great success of PaperStone countertop!

-- "I never met a board I didn't like!"

View CaptainKlutz's profile


2261 posts in 2104 days

#5 posted 07-15-2018 07:33 AM

+1 silicon caulk

Highly, suggest you discuss mounting granite of choice with your granite shop?

Unsupported granite overhang can be broken off with a sharp impact or heavy weight.

I wanted to use granite on some family room tables, and granite shop suggested no more than 2-3 inch over hang for ‘thin’ stone, unless used a wood backing layer underneath. ‘Thin’ 3/4 inch countertop installations of granite are usually made on top of a MDF/OSB wood base layer. Most times the wood backing layer is hidden in kitchen install by a extra 3/4×2 inch strip epoxy bonded to edges for edge profile. The nice part about base layer is you can use screws to attach countertops to cabinets; which makes the top more easily replaced without damaging cabinets. Some types of granite are much more prone to breakage than others due crystal structure. In my case; boss wanted expensive stuff that cracks when you look it wrong, so she ended up choosing wood instead.

Best Luck.

-- I'm an engineer not a woodworker, but I can randomly find useful tools and furniture inside a pile of lumber!

View BurlyBob's profile (online now)


6920 posts in 2875 days

#6 posted 07-15-2018 02:18 PM

Bill I forgot to mention that We went with Quartz counter tops as recommended by the shop owner. He told us it is stronger that Granite and much more durable. That might be an option for you.

View ArtMann's profile


1462 posts in 1425 days

#7 posted 07-15-2018 07:42 PM

There is no such thing as silicon caulk. Silicon is the same thing as sand. What you want is silicone caulk.

View hokieman's profile


196 posts in 4363 days

#8 posted 07-15-2018 08:01 PM

Yep, silicone caulk is all they used on our granite countertops.

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