Foundation services
Foundation drainage correction: grade and downspouts
Foundation drainage correction means reshaping the ground and redirecting roof water so rain flows away from the house instead of soaking the soil beside it.
Find a Foundation Professional What it costs
Written by HyreFoundation Research Desk Primary-source research and fact checking
The short answer
Foundation drainage correction means reshaping the ground and redirecting roof water so rain flows away from the house instead of soaking the soil beside it.
The model code calls for at least 6 inches of fall in the first 10 feet and a 2 percent slope on paving.
It is the cheapest foundation work there is, and much of it is homeowner work.
Key takeaways
is the code target for soil next to the house.
of the foundation.
, the code allows swales and drains.
Keep clearance.
What does drainage correction involve?
Extend or bury solid pipe to carry roof water away from the wall.
Add and compact soil to rebuild the slope. Keep clearance between soil and wood siding.
A shallow channel steers water around the house where the lot does not allow a full slope.
Mudjack, lift or replace walks and patios that tip toward the house. See concrete lifting.
What moves the price
Mostly labor and soil. We publish no price figures until we hold enough sourced, dated quotes; see what drives foundation costs.
| Factor | Why it changes the number |
|---|---|
| Soil and footage | How much fill, and around how much of the house. |
| Hardscape | Pitched paving that has to be lifted or replaced. |
| Buried pipe | Solid lines to daylight or a dry well. |
HyreFoundation publishes no national average price for this work. Depth to bearing, soil, access and method vary enough between two houses on the same street that a single figure would mislead.
When is drainage correction enough?
When water shows up only during or right after rain, in one or two places under downspouts or low soil. Try it first. If water keeps coming in dry weather, look at groundwater fixes.
What to ask before you sign
The full checklist is on choosing a foundation contractor.
Where this goes wrong
Mulch holds water and does not build a lasting slope.
Soil against wood siding invites rot and termites.
Redirecting runoff onto a neighbor can create a legal dispute.
Get connected
Tell us about the work
Three short steps: the job, your home, and how to reach you. Nothing goes to a foundation company unless you agree.
A straight answer first. A person reads it and replies by email, free and with no obligation. Matching is not live yet, so this is not a quote. If a wall is moving or a door frame has racked out of square this week, call a structural engineer first.
Find a Foundation Professional
A person at HyreFoundation reads the request and replies. Matching is not live yet, so this is not a quote.
Questions
How much should the ground slope away from a foundation?
How far should downspouts extend?
Can bad drainage cause foundation problems?
Can I regrade around my foundation myself?
Written and audited by
HyreFoundation Research Desk
Primary-source research and fact checking
We read the model building code, the federal soil and moisture guidance and the insurer position ourselves, and we publish each figure with the document it came from and the date we retrieved it.
Where a number cannot be traced to a primary source, we say so instead of printing it. HyreFoundation does not inspect, engineer or repair foundations. Authorship is organizational: this desk, not a named persona.
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How this desk works
- Primary sources only. Code statements come from the International Residential Code, Chapter 4, as the model code. Soil statements come from USDA and USGS. Insurance statements come from the policy language and the Insurance Information Institute. We open the source rather than cite a blog that cites it.
- The code is a model, and adoption is local. Your jurisdiction adopts an edition and amends it, and foundation chapters are amended more than most because frost depth and soil are local facts. Every code figure says so.
- We hold no job data. We have no dataset of bids, pier counts or invoices, so no page claims an average from one. Calculators show the arithmetic and the inputs they assumed, and label the result as an estimate.
- We do not diagnose your house. A crack guide can tell you which pattern to measure and when to call a structural engineer. It cannot tell you whether your foundation is failing. An engineer on site does that work.
- We do not repair foundations, and we take no payment for placement, ranking or a favorable mention. Nobody buys a position on this site.
Authorship on this site is organizational: the analysis belongs to the desk rather than to a named individual, and we do not publish credentials we do not hold. Our editorial policy sets out how we source, date and correct what we publish.
Sources & retrieval dates
Information on this page is general and varies with soil, climate, foundation type, building code, insurance policy and circumstance.
It is not engineering, insurance or legal advice, and no page can tell you whether your house has a structural problem: that needs a licensed professional on site.
HyreFoundation is an independent foundation resource, not a repair contractor or an engineering firm, and does not perform, supervise or warrant foundation work.