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Question DetailsAsked on 7/21/2017

Is it normal for countertop to have outside rim 1 inch think but the sink edge only 0.5 inch?

The builder used 0.5 inch quartz to build my countertops and island. They built the outside rim with 1 inch length, making it look like a 1-inch slab. They put wood in the hollow space inside and cover the bottom with another thin quartz. Is this how modern quartz countertop built?

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Voted Best Answer

Commonly, yes if you use thin countertop. Personally, I do not like anything less than 3/4" thick countertops for edge strength and for resistance to cracking in case someone climbs up on top to get a top shelf item off a high kitchen cabinet shelf or such. I have seen cases where just setting a heavy chunk of frozen meat or heavy sack of potatoes or flour or such down hard, or setting a child on a thinner countertop, has cracked it. Another reason to use continuous 3/4" underlayment under a countertop too - my preference.

With thin countertop, especially sink rim edges where heavy pots of water or such may be thumped down and there is also a tendency to lean heavily against it, it is very common to epoxy glue on another piece of countertop material either on the front (like with drop-edged or bullnosed front edges) or underneath to reinforce it - which with finish polishing should make for a virtually invisible seam. The thin coverpiece underneath to conceal the wood supports from underneath would be considered a rare higher-quality touch - most countertops are installed with bare wood (or particle board) exposed underneath on the philosophy I guess that out-of-sight is out-of-mind.

But that can cause problems from liquids running down the edge of the countertop and then wicking back underneath to the support wood or the face of the supporting cabinet, wetting it. So from what you describe, assuming the glued-on "backing strip" has a nearly invisible seam, sounds like you got a contractor who takes the care to do the job right. Especially if he used solid wood or at least exterior grade plywood (I prefer marine grade in kitchens/bathrooms) rather than particle board or OSB as the supporting wood under the countertop, because at least 1/2" countertop needs more support than just what it would get sitting on the edges of the cabients.

Answered 3 years ago by LCD

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