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Concrete Countertops on 3/4" plywood boxes?
Post by romanekr on Nov 1st, 2009, 11:36am
We are considering installing concrete countertops and were wondering if 3/4" plywood boxes (solid tops) are strong enough or if additional bracing is necessary. If so, how do you reinforce it? Anyone have an opinion or experience with this?
Rox 
Re: Concrete Countertops on 3/4" plywood boxe
Post by Rob on Nov 1st, 2009, 1:42pm
I've never worked with concrete countertops but I would think they are about the same weightwise as granite. And I’ve never done anything special for granite other than adding extra supports under longer cabinets wherever there is a partition.
Rob
Re: Concrete Countertops on 3/4" plywood boxe
Post by Jeff on Nov 1st, 2009, 2:28pm
You shouldnt need to beef up anything. They get installed on standard cabinets all the time.
They do weigh considerably more than granite. Granite is usually 3/4" thick with a built up edge. Concrete is usually 1.5 to 2" thick.
Re: Concrete Countertops on 3/4" plywood boxe
Post by bowdoctor on Nov 1st, 2009, 3:24pm
we built some for them and the contractor asked for 3/4" nothing extra
Re: Concrete Countertops on 3/4" plywood boxe
Post by tament on Nov 1st, 2009, 4:26pm
A typical concrete countertop weighs about 140 lbs. per cubic foot. Most base cabinets aren't backed and may need some additional support. Better safe then sorry! Fu-Tung Cheng has a step by step book out called "Concrete Countertops" that's pretty informative, lots of great photos as well.