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Quartz weigh's 16-20 lbs per sq. ft. depending if it's 3/4" or 1-1/4". You will be fine with attaching a strip of 3/4" x 2" depth plywood or solid wood strips on all three wall sides and then slide the quartz into place for 1-1/4" (3cm) thickness, all four sides need support for 3/4" (2cm) thickness. I am a professional fabricator of 19 years.


The countertop guys will laugh at you if you want to span quartz over a 5' span. Basically quartz and granite can barely span a dishwasher width - meaning we get buy with not having plywood over the counters. And that is given nothing heavy is stored on it on that section. Given you will have a washer and dryer below it, I would protect it. Since if a ...

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