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gls2009
soil erosion leading to cracked concrete slab patio & sagging stone patio door ledge

Suspect that the single line crack across the middle of our concrete 8' x 9' patio is due to soil erosion from the gutter drain. We also suspect the soil erosion is causing the 6' long stone ledge at the base of our sliding patio door to sag. This sagging ledge is causing the patio door to pull away from the floor and wall leaving a 1/4" gap at the base. What to repair first? Are we correct in assuming that much of landscaping to correct soil erosion should occur after the concrete patio & the cracked patio door are replaced? Is completely replacing the concrete patio the only option? What can we do and what must we hire a contractor(s) to do? Is it sufficient to patch the cracks and focus on the soil erosion or should we replace the concrete patio? Should we replace the patio door?

calcats
Re: soil erosion leading to cracked concrete slab patio & sagging stone patio door le

You have many variables, you should have a general contractor look at the situation and help you determine if the erosion is causing the door problem and if the crack in the patio warrants replacing or patching the patio. Good Luck, and don't just jump into something, get a couple of viewpoints first.

Calcats ;)

gls2009
Re: soil erosion leading to cracked concrete slab patio & sagging stone patio door le

Thank you. We'll remember to consult with at least a couple of general contractors.

Re: soil erosion leading to cracked concrete slab patio & sagging stone patio door le

And there are some contractors who specialize in concrete work, and can suggest options that may not include replacing the entire concrete slab. Maybe just a portion of it, or can even hydraulically lift the pad and inject new concrete under.

But check with a concrete specialist for a better solution.

NOVAPros

Timothy Miller
Re: soil erosion leading to cracked concrete slab patio & sagging stone patio door le

Howdy,
First get the down spout draining away from the slab and retaining wall at least 6 foot past each. The black plastic pipe that loos like you streched a slinkie and coated it with plastic works great. It can be burried or leave it above ground and it can be slid right up around the end of your down spout. I use the 5" pipe so i do not have to buy the adapter to add it to the down spout and it allows me to flush the pipe with my garden hose if need be without removing anything.

The slab crack is due to no expansion joint. When the pad was made it should of had strier joints made so when the concrete heats and cools it can have cracking controlled by the joints. Ideally joints are installed for every 20 to 30 square foot of slab . One can use a self leveling never hardening concrete (caulk) to keep water and freeze and that from making the crack larger and more soils movement. This is about $5.00 per tube and sold at concrete supply companies and better then what one can get at the box stores...
The setteling by the door is from almost alwasy not having compacted the soils wehn back filling the foundation. Due to no or poor soils compaction the natural setteling process occurs over time made more dramatic if water is intoduced into the area. Consider contacting a mud jacker- pressure grouting - company for a bid to raise and stabilize the setteling area. The injeection of concrete under pressure raises the setteled area and stabolizing the soil and compacitng it all at the same time.

gls2009
Re: soil erosion leading to cracked concrete slab patio & sagging stone patio door le

Thank you, 697295. You've given us an idea to check whether the concrete slab is slanted toward the house. Thank you especially to Timothy for clearly separating the problems. We have a better idea what we should do and who to call to solve these problems.

Timothy Miller
Re: soil erosion leading to cracked concrete slab patio & sagging stone patio door le

Hi you are very welcome. Oh forgot you can likly re align the door once the slab is addressed.

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