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Question DetailsAsked on 12/3/2016

do I need reinforcement mesh for a patio 11 ft by 60 ft. the cement will be 4 inches thick will only be walked on

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2 Answers


Except for mass concrete - bulk concrete put in for weight or as a general fill, any concrete and especially all slabs should be reinforced, otherwise normal shrinkage cracks (hairline to invisible) will eventually open up as open cracks.

Also, with reinforcing, you should not get any differential movement vertically across any cracks - shrinkage, settlement, or expansion joints. Without reinforcing mesh (normally a single layer centered in the thickness of slab, with stone or brick or metal "chairs" to hold it in up place in the center of the slab thickness during placement in your case) any cracks can result in vertical offset across the joint, as well as opening up as sand and dirt or freezing water gets in the crack if there is no steel to hold it into one piece and tie it together. Reinforcing may be swet by code for your area - check with building department, but commonly 6x6x10x10 would be used for walking surface only - 6x6 grid of #10 wire each way, called "welded wire mesh" rather than rebar, available in sheets and rolls commonly. Sheets easier to work with but harder to handle if you don't have a trailer or large truck, rolls you have to reroll the other way to flatten out before use but easier to transport in pickup or SUV. Some building supply stores/yards carry cut sheets for convenience that will fit in a normal SUV, but you need a lot more tie wire and mesh (overlap two full grids) for the same area. 4" is really too thin for rebar, even #3 - will result in surface popouts and cracking as the steel rusts.

Answered 3 years ago by LCD



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Answered 3 years ago by Member Services

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