A Right-Sized Foundation Inspection Checklist for Fall

What to check on your foundation before winter

A fall foundation walkaround takes one dry afternoon, and water is what you’re hunting.

The 10 checks at a glance

Walk the outside first, then the inside:

1. Gutters clear and flowing
2. Downspouts discharging 5 feet out
3. Window wells clear
4. Soil sloping away from the wall
5. Soil gaps at the wall
6. Sprinklers and plants at the wall
7. Exterior cracks, measured
8. Interior signs: doors, drywall
9. Basement moisture and humidity
10. Sump pump test

Find your situation

• Found a crack? Skip to the cracks section.
• Damp basement? Go to the moisture section.
• Renting? Report moisture problems to your building owner right away, as the EPA advises.

ℹ️ Safety Note: Judging structural damage, roof-height work, digging near a foundation, and sump pump wiring carry risk of injury or major damage. This is general information, not an engineering evaluation. Hire a licensed structural engineer or contractor, and follow local code and permit rules.

When to inspect, and what changes where you live

Inspect after the leaves drop and before the ground freezes.

Best timing: after leaf drop, before the ground freezes

Clear gutters first, then work the walls.

Cold climates: freeze-thaw and frost heave

NDSU Extension’s explanation of frost heaving says ice layers can form when the frost line sits near the water table, lifting soil. Heaving is likelier with a high water table and clay or silt soil. Warning signs are in frost heave foundation cracks.

🔍 Why It Works: Very wet soil expands as its water freezes, so soggy soil beside the wall pushes harder.

Mild or dry regions: swelling and shrinking soil

Where winters stay mild, watch dry spells. Expansive clay can swell when wet and shrink when dry, leaving gaps at the wall.

Check gutters, downspouts and window wells first

Start with roof water.

Gutters: clear and flowing

Packed gutters overflow at the wall. The Department of Energy’s Building America Solution Center advises keeping cold-climate gutters clear so they don’t hold water that freezes. Clear and hose-test every downspout from the ground.

Downspouts: where does the water land?

Measure from the wall to where each downspout lands. DOE says surface discharge should end at least 5 feet from the foundation, or feed an underground catchment at least 10 feet away.

Window wells: clear and draining

Scoop debris from each window well, then check for standing water after rain.

✅ Do This: Hire a gutter professional for two-story homes, steep roofs, or loose gutters. Ask whether they flush each downspout.

Check the grade, soil and plants at the wall

Soil sloping toward the house sends rain to the foundation.

Does the ground slope away?

DOE’s Standard Work Specifications call for about 6 inches of fall over the first 10 feet. DOE’s building-science grading guidance gives the minimum as ½ inch per foot for new construction, with swales or drains under 10 feet. Check your grade with a string and level.

Soil gaps, settling and hard surfaces

Look for soil that has settled or pulled from the wall, and for patios sloping toward it.

Sprinklers, shrubs and trees at the wall

Point sprinklers away from the wall. Trim plants so they don’t block drainage.

⚠️ Watch Out: Don’t dig along the wall. Call 811 before digging, and hire a licensed contractor for repeated flooding.

Check foundation walls and cracks, inside and out

Direction and change tell you more about a crack than width alone.

Outside: walls, cracks and spalling

Walk each wall for cracks and flaking concrete. Photograph each crack with a ruler in frame; log width and date.

Pass, watch or call: reading a crack

Rules of thumb. HUD’s foundation inspection standard flags cracks ¼ inch or wider and 12 inches or longer.

Inside: doors, windows and basement walls

Note sticking doors, new drywall cracks, and floor gaps. Humidity can also stick doors; see sticking doors and foundation trouble.

✅ Do This: For horizontal, growing, or leaking cracks, book an independent licensed structural engineer before anyone patches them; sealing an active crack can hide movement. Confirm their license.

Check basement moisture, humidity and the sump pump

Catch moisture early.

Basement walls and floor: damp, stains, musty smell

Look for damp patches and musty smells. EPA’s guide to mold and moisture says to dry water-damaged areas within 24–48 hours; mold over about 10 square feet needs professional-level guidance.

Humidity: keep it under control

The EPA advises keeping indoor humidity below 60%, ideally 30–50%; a hygrometer shows it.

Sump pump: a quick test

Following NDSU Extension’s sump pump check:

1. Confirm the outside discharge pipe is clear and points away from the house.
2. Check that it’s plugged in and the sump holds no debris.
3. Lift the float about 10 seconds if the sump is dry, or pour water in slowly.
4. Confirm the pump switches on and off at least twice.

✅ Do This: New to sump pumps? NDSU suggests a licensed plumber. For mold past EPA’s size line, hire a professional.

Found something? Fix, monitor or call a pro

Your log gives each finding one of three outcomes.

Pass: log it and move on

Save the dated photo as your spring baseline.

Watch: re-measure on a schedule

Re-measure on schedule and note changes.

Call: who to phone first

For horizontal, growing, or leaking cracks, call an independent structural engineer first. Choose a foundation company first only for a problem you already know. Read who to call first and what repairs cost before you commit.

✅ Do This: Confirm any contractor’s license with your state or county, and get multiple written estimates before signing.

Fall foundation checklist: quick answers

Your next step before the first freeze

Pick one dry afternoon, walk the ten checks, and record findings with dated photos. Save the log, then repeat the walkaround in spring and compare. Our free Fall Foundation Walkaround Log keeps measurements, photos, and dates in one place.