Concrete Patio slab 4" , 5" or 6" thickness ?

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Old 05-01-19, 01:51 PM
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Concrete Patio slab 4" , 5" or 6" thickness ?

Building a concrete patio slab what thickness should I do ?? Also how deep of gravel ??
 
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Old 05-01-19, 02:56 PM
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Depends if you ever plan on driving / parking a car on it.
 
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Old 05-01-19, 02:58 PM
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It's for patio set in the backyard
 
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Old 05-01-19, 02:59 PM
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4" should be fine. You don't need gravel if it's already compacted.
 
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Old 05-01-19, 03:02 PM
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Should be ? Lol
should I just go thicker then

How deep should foundation of gravel be
 
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Old 05-01-19, 03:28 PM
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It really depends on your soil and you have provided no information. Sandy soil requires no gravel. Clay soil might need 4" or more. You also don't generally want to invite water under your slab by digging a lake under your pad. So if you are creating a pad on grade it's often advisable to first create a raised, compacted area of soil that will shed water away from the forms. Use 2x6 forms, fill with maybe 1 1/2" of sand or compactable gravel, pour your 4" pad on that. Then after you remove your forms you will need to add topsoil around it since the top of your pad is now 6" above the rest of the yard.
 
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Old 05-01-19, 04:54 PM
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Just for comparison, my slab for 2500 gal swim spa was 6", my driveway is 5", a patio for people, chairs and stuff only needs to be 4"
 
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Old 05-09-19, 05:10 PM
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Is there rebarb or mesh in there ?
 
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