Hi all. I wrote earlier in this week about an uneven brick patio that seemed to have 3/4" gravel under the bricks.
I did some digging and learned that there is a French drain under my patio...hence the gravel. The rest is sand over gravel as it should be.
The brick pavers use a running pattern parallel to the perforated black flex drain pipe.
I presume perforated pipe French drains hate sand (true?) and I know brick patios love sand.
Question 1: Can I get the sand any closer to the drain to make the brick leveling easier? I think the gravel bed is about 16-20" wide.
Question 2: The point of greatest subsidence was over that drain inlet. Is that supposed to be over a very slightly angled bowl in the bricks? Wondering if that makes a difference. It does seem, after 25 years, that there is not much of a bowl leading down toward it.
Thanks! You can see the perforated drain pipe, with a cleanout/drain at the lower center.
Last edited by debeze; 11-05-22 at 09:16 AM.
Reason: edits for clarity
1. I would put down landscape fabric between the compacted gravel and sand layer. It will still allow water to penetrate while holding the sand in place.
2. If there was not an intake grate/drain on the surface I doubt they did it intentionally. The dip you have is more likely a mini sink hole. Sand, dirt may have been washed away over time causing the area to sink. If the drain in your photo is in the area they might have tried sloping toward the drain and didn't do a good job. If you want to do that I'd go out as far as you can/want and set up guides to screed your sand with a slope towards the drain.
I've noticed some small holes in my exterior walls at ground level next to my driveway. The pictures show the one right in the corner which is a small hole about the depth of my pinky finger and the other set of cracks/holes a bit further down the driveway are quite a bit larger, Probing with my hand I can fit half my fist into the largest hole, I'm not sure if they communicate with the interior but there are no obvious signs of damage in my basement.
Do I need to be concerned about my foundation and could I just get some concrete mix and patch it up?
[img]https://cimg7.ibsrv.net/gimg/www.doityourselft.com-vbulletin/2000x913/img_20221026_110716_3f4fe81ca2fcd6573e678184de7a7d4df07ed555.jpg[/img]
[img]https://cimg6.ibsrv.net/gimg/www.doityourselft.com-vbulletin/2000x913/img_20221026_105554_219ce82893ad3b203b75b6c8536053121d295ab0.jpg[/img]
[img]https://cimg2.ibsrv.net/gimg/www.doityourselft.com-vbulletin/2000x913/img_20221026_105532_c6019e05c7c95c09b35060ada371fcde937dfb8a.jpg[/img]
[img]https://cimg4.ibsrv.net/gimg/www.doityourselft.com-vbulletin/2000x913/img_20221026_105546_321aaddfc08018430eddb7f9a6e0186fd01026d3.jpg[/img]
Hi. I have zero experience with this so please pardon some basic questions....
I have a 4" x 8" clay brick patio without mortar that is subsiding in the center. There is virtually no space between bricks. A spirit level indicates that the far end (away from the house) slopes back toward the house, in part. And part of it is level. My goal would be to reset the bricks in the problem area so that it slopes downward away from the house to correct it,
[img]https://cimg1.ibsrv.net/gimg/www.doityourselft.com-vbulletin/1838x1210/screen_shot_2022_10_30_at_5_36_36_pm_28a04cbb7a17c719ef06554f526663dbcda5f2e1.png[/img]
[img]https://cimg2.ibsrv.net/gimg/www.doityourselft.com-vbulletin/1856x1208/screen_shot_2022_10_30_at_5_36_14_pm_0a499106e1ef8f13a1200757b2a47e5c29e41530.png[/img]
and then prevent/delay settling in the future
I assumed that there was sand beneath it so I bought three bags of sand, took out a brick and found 3/4" gravel.
Questions:
1. Can sand and gravel be combined to any positive effect?
2. Is a hand tamper adequate over an area of about 80 square feet?
3. Does it make sense to finish with polymeric sand over part, but not all, of the patio?
4.For an area this size do I need rails and a screed board?
5. If I need a [u]small[/u] amount of additional gravel, is there a way to get it without purchasing a half cubic yard or whatever?
Thank you very much for any help you can provide!!!!
[img]https://cimg3.ibsrv.net/gimg/www.doityourselft.com-vbulletin/1856x1208/screen_shot_2022_10_30_at_5_36_14_pm_bde5ac3f8d7bb4fa3dbbf841c204f9a0ca1a00b5.png[/img]
[img]https://cimg4.ibsrv.net/gimg/www.doityourselft.com-vbulletin/1838x1210/screen_shot_2022_10_30_at_5_36_36_pm_1f068de0c49d3069ac6f081f65d3a51e9f5ef606.png[/img]
11-05-22, 09:14 AM
