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Improve perimeter drainage and monitor settling

$2,000-$5,000 Est. time: 1 - 2days Medium
A
A
B
C
C
D
D

Tasks and Notes

A
Improve downspout-to-leader connections.
B
Trench with standing water along south crawl space wall.
C
Crack above office doorway.
D
Crack above east bedroom door. Door sticky.

Description

The leader system is newer than the downspouts, suggesting it’s a more recent addition. It is unclear where the stormwater goes. It should be draining into a dedicated culvert and not into the septic system as it is not designed to handle that volume of water. Check your records to verify that this is the case.

The downspout-to-leader connections are open and so some amount of stormwater must be overflowing onto the siding and near the foundation. The concern with rainwater gathering around the perimeter of the house is that it will seep into the ground around the foundation, leading to cracks (caused by the pressure from the waterlogged soil) and settlement issues as the soil erodes. Extend the downspouts deeper into the leaders.

Similarly, we recommend redirecting the SE downspout from the rain barrel back to the leader system as there is currently no mechanism for diverting stormwater back to the leader when the barrel is full.

There is evidence that the house is starting to settle on the south side, likely due to inadequate perimeter drainage: standing water along the south side of the crawl space, slightly sloping floors inside the house in this area, settling cracks on some interior walls and trim, and a few misaligned, sticky doors.

Settling is a slow process, but will generally get worse if unaddressed. Monitor the existing interior cracks as well as the south-side floors and foundation for any additional cracking and sloping and consult a drainage specialist to explore a perimeter drainage system installation.

If Not Addressed

Settling damage is the main concern here. Major foundation cracks are difficult to fix after the fact. And all the supports in the world won’t keep the floors level if the soil below them is undermined by excessive water.

Estimated Costs

We estimate this project will cost about $2,000-$5,000. These costs will fluctuate based on the actual conditions the contractor encounters. Request quotes from at least 3 professionals.

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