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Old 07-25-2017, 01:58 PM   #1
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Need advice on compacting a raised paver patio please!!


We are building a 600 square-foot raised paver patio. It has a base of 6 inches that has been compacted every 2 inches. We have a 1 inch layer of sand. The pavers will extend on top of a 12 inch retaining wall (with concrete adhesive). We are wondering if we need to compact the finished patio and are worried that if we do it will sink lower than the retaining wall. Also, we are worried that the compactor would disturb the adhesive between the pavers and retaining wall. And lastly if we do need to compact should we put sand in the joints before or after compacting?
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Old 07-25-2017, 03:50 PM   #2
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Re: Need advice on compacting a raised paver patio please!!


Difficult choice with the pavers being glued to the top of that wall. IMO they will definitely sink when compacted and yes you would want sand inbetween. If you don't put the sand inbetween it will squeeze up from below, it will anyway but less.

What size pavers are you using and what pattern? Could you top the wall with secured pavers and then set your floating patio to the inside, a bit high to allow for sinking? Then, if it sinks too much, now or over time, you could pull the floating area and add more sand.

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Old 07-25-2017, 04:52 PM   #3
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Re: Need advice on compacting a raised paver patio please!!


I think it's pretty likely that the pavers will move relative to the wall. You want to run a compactor over the pavers when they're all down and that right there will cause them to sink a bit and really lock together.

I probably would have made a decorative retaining wall and paved right up to it about 1/4" to 3/8" higher. Assuming you did a decent job of compacting the gravel the pavers would settle about a 1/4" to 3/8" after compaction.

At least this is how it works in the northeast where I am.
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Old 07-25-2017, 06:09 PM   #4
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Thanks for the reply. So it sounds like you don't think the retaining blocks will sink as much as the pavers?
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Old 07-25-2017, 07:07 PM   #5
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Re: Need advice on compacting a raised paver patio please!!


If the retaining wall blocks are just setting on dirt they may well sink also. Normally a retaining wall would be set on s footing but that might be overkill for a short wall.

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Old 07-25-2017, 07:09 PM   #6
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Re: Need advice on compacting a raised paver patio please!!


Unfortunately, no. The soil under it all will settle gradually. The sand will still settle a bit more even if you do compact it. You didn't mention what footing the wall is on.

Bud9051 gave you one way to address it. My way is similar and I would use a different paver style to make a decorative border.

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Old 07-25-2017, 07:14 PM   #7
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We put 4" of minus that was compacted with a hand tamper under the retaining blocks. So maybe the retaining blocks would still settle a little?? We will remove the pavers and add 1/4 to 3/8 more sand. Thanks for the comments!!
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Old 07-25-2017, 07:26 PM   #8
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Re: Need advice on compacting a raised paver patio please!!


I would use a flat plate compactor and not a hand tamper on top of those pavers. With a good tamper you can usually work them down as much as needed. Can't pull them up but down is related to how long you work them.

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Old 07-26-2017, 02:50 PM   #9
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Re: Need advice on compacting a raised paver patio please!!


And the size compactor you use, get a 3500/4000 lb. compactor or you'll be at it forever.
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Old 11-28-2017, 10:11 AM   #10
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Thanks so much for all the advice - here’s the finished patio.
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Need advice on compacting a raised paver patio please!!-896f8e35-870d-4056-ab03-88d2eb8e63eb_1511885454379.jpg   Need advice on compacting a raised paver patio please!!-52770628-7ac9-44bc-a83f-b9b7e0f57cf0_1511885474936.jpg   Need advice on compacting a raised paver patio please!!-13855699-38eb-4127-ba6d-0cef8eec9c74_1511885498239.jpg  
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