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How thick of a concrete pad???
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Topic: How thick of a concrete pad??? (Read 45312 times)
sledjunkie
Full Member
Posts: 348
I love YaBB 1G - SP1!
How thick of a concrete pad???
«
on:
July 06, 2006, 12:18:09 pm »
I did some math and for a 7.5' x 7.5', 4" thick pad it's going to take about 32 80lb bags of quikrete.
Is this overkill?
Could I get away with say a 2" thick pad?
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How thick of a concrete pad???
«
on:
July 06, 2006, 12:18:09 pm »
salesdvl
Senior Member
Posts: 1154
Re: How thick of a concrete pad???
«
Reply #1 on:
July 06, 2006, 12:28:43 pm »
4" reinforced pad is what I've always said.
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Measure once, cut twice.
wmccall
Global Moderator
Mentor Level Member
Posts: 7431
Re: How thick of a concrete pad???
«
Reply #2 on:
July 06, 2006, 12:37:35 pm »
Quote
4" reinforced pad is what I've always said.
And what my dealer and several others have said. Many cement people who pour pads use that as a default.
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Member since 2003. Owner Dynasty Excalibur 2003-2012. Sundance Majesta from 2012-current
96SC
Full Member
Posts: 611
Re: How thick of a concrete pad???
«
Reply #3 on:
July 06, 2006, 01:45:11 pm »
If a sidewalk that only supports foot traffic are layed 4" thick, you'd better go with 4" for a possibly multi-ton hot tub.
IMHO
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Before I speak, I have something important to say--Groucho Marx
bulmer4nc
Full Member
Posts: 478
Now a Canes Fan.
Re: How thick of a concrete pad???
«
Reply #4 on:
July 06, 2006, 04:06:06 pm »
Quote
4" reinforced pad is what I've always said.
We had a 4" pad that was not reinforced and never had a problem.
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DPS
Full Member
Posts: 174
The light was yellow, sir
Re: How thick of a concrete pad???
«
Reply #5 on:
July 06, 2006, 11:43:40 pm »
4 inch reinforced, thicker if it is not on level ground.
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DPS
Full Member
Posts: 174
The light was yellow, sir
Re: How thick of a concrete pad???
«
Reply #6 on:
July 06, 2006, 11:43:59 pm »
4 inch reinforced, thicker if it is not on level ground.
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Jack_L
Junior Member
Posts: 59
Re: How thick of a concrete pad???
«
Reply #7 on:
July 07, 2006, 02:24:46 am »
My pad is 4"-5" and 18'x25' and so far so good. There were cracks that showed up a few weeks afterwards from settling, but that was never an issue since we had planned to cover the concrete with 1'x1' slate anyway. I have been doing the slate work this week and hope to be finished by sunday.
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hawkman
Junior Member
Posts: 60
Re: How thick of a concrete pad???
«
Reply #8 on:
July 07, 2006, 01:40:28 pm »
4" minimum. Depending on where you live there may be different PSI requirements. Mine was 3500 PSI. I would get a truck to deliver the concrete, not mixed in bags. It will be worth your back and time to get it delivered.
You may even want to prepare the surface with a compacted gravel base. 2 things concrete will do.. cure and crack
Remember your tub with water and people could weigh 6,000 pounds. That is the weight of a Toyota Sequioa.
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Jack_L
Junior Member
Posts: 59
Re: How thick of a concrete pad???
«
Reply #9 on:
July 10, 2006, 06:47:38 pm »
Here is a photo of my slate project so far. I ended up with 320 1-foot square sections of slate installed on the concrete pad, and what a job that was. Now that I'm getting near the finished product it is starting to look ok. The tiles are still a bit dirty from the grout, but its not too bad. Tonight I hope to finish the cleaning and will add the sealer. It does look better then the plain ol' concrete.
«
Last Edit: July 10, 2006, 06:48:17 pm by Jack_L
»
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sledjunkie
Full Member
Posts: 348
I love YaBB 1G - SP1!
Re: How thick of a concrete pad???
«
Reply #10 on:
July 10, 2006, 07:44:21 pm »
thanks for the replies everyone. I will be doing a 5" deep 7.6' x 7.6' pad. I will also be using wire mesh.
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Hoosier
Junior Member
Posts: 7
Go Irish!
Re: How thick of a concrete pad???
«
Reply #11 on:
July 10, 2006, 09:15:49 pm »
How long should you let the concrete cure, before placing the spa? I've heard conflicting opinions from friends, one said 5-7 days depending on the weather. Another said to let it cure a month...?
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Zep
Senior Member
Posts: 1439
Cal Spas SQ92 Dallas-Texas
Re: How thick of a concrete pad???
«
Reply #12 on:
July 11, 2006, 08:29:19 am »
Jack.....the slate looks awesome!
Ten times better than "plain concrete".
Please keep posting pics of your project.
Very nice!
ps: My slab is 4.5 inches thick....
I would think 2 inch could cause
problems down the road. Do it
right the first time!
«
Last Edit: July 11, 2006, 09:07:09 am by Zep
»
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seamoe
Junior Member
Posts: 16
Re: How thick of a concrete pad???
«
Reply #13 on:
July 11, 2006, 05:06:24 pm »
I have a 20x20 slab that's 4.5" thick and its reinforced with rebar and mesh, which if your putting a tub on is a must. Even with that, I still have two cracks that run the length and width of the slab. I would suggest cutting across the middle in both directions when its finished. Another suggestion is to stamp it in a flagstone or other patterns if you want to dress it up, then either stain it or use colored concrete. It might cost a little, but the end result is well worth it.
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Re: How thick of a concrete pad???
«
Reply #13 on:
July 11, 2006, 05:06:24 pm »
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