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In Lehi, older downtown homes get mold from aging foundations, cellars and plumbing, while newer homes get it from first leaks and storm runoff into finished basements. The approach differs: older homes often need moisture-tolerant repairs, newer homes need fast drying.
About Lehi
Lehi was settled in 1850 and incorporated in 1852, and had 75,907 residents at the 2020 Census. The historic center includes landmarks such as the Lehi Roller Mills, while the Traverse Mountain area and the Silicon Slopes tech corridor have driven rapid newer growth. Lehi borders Eagle Mountain and Saratoga Springs to the west and southwest.
Older Homes vs. Newer Homes
Historic and older homes
Older foundations, cellars and masonry hold moisture; many have been remodeled several times, hiding old water damage behind newer finishes.
Newer homes
Finished basements with drywall and carpet over concrete; problems come from appliance leaks, window wells and storm runoff.
| Home era | Typical sources | Approach |
|---|---|---|
| Older / historic | Damp cellars, old windows, aging pipes, past remodels | Moisture-tolerant materials; ventilation; careful removal |
| 1980s–2000s | Original water heaters and plumbing replaced piecemeal | Find the leak; replace aging fixtures |
| 2010s–today | First leaks, window wells, storm runoff, settling grade | Fast drying; grading and well covers |
Older foundations with hairline cracks often need foundation crack sealing before a basement is refinished.
Storm and Runoff Events
Lehi has had repeated basement flooding from heavy storms that overwhelmed drainage, including events in 2017 and 2019. Like the rest of northern Utah County, its biggest water threats are sudden storms and spring runoff, and the city prepares each year for high spring flows.
If water is already inside, start with basement flood water extraction.
Historic Downtown: Cellars and Old Foundations
Lehi was settled in 1850, and the older blocks downtown still have adobe and brick homes, some with stone or brick foundations and small cellars that were never meant to be living space. Those foundations breathe: moisture moves through mortar joints and masonry, efflorescence builds up on the walls, and a finished room built inside an old cellar often traps that moisture behind drywall.
- Do not seal old masonry walls with plastic or paint on the inside; it traps moisture.
- Keep stored items off cellar floors and away from walls.
- Use a dehumidifier and check humidity in summer.
- Ask before finishing an old cellar; the walls may need drainage first.
Traverse Mountain and Hillside Homes
At the other end of Lehi, newer homes on Traverse Mountain and other hillside neighborhoods often have walkout or daylight basements cut into the slope. The uphill wall is fully below grade and catches runoff; the downhill wall is exposed. Leaks on hillside lots usually show up on the uphill side and around window wells, especially after big snow years.
Older Plumbing in Older Homes
Older Lehi homes may still have galvanized steel supply lines or decades-old fittings. Galvanized pipe corrodes from the inside, and leaks often start as slow drips at joints in basement ceilings or inside walls. Low water pressure, rusty water or green and white crust on fittings are signs the plumbing is near the end of its life, and worth fixing before a basement is finished underneath it.
How We Work in Lehi
- Identify the home typeOlder masonry and newer drywall basements need different repair plans.
- Trace the waterMoisture mapping and history: storm, plumbing or seepage.
- Remove and cleanContainment, removal of moldy materials, HEPA cleaning.
- Repair to suit the houseMoisture-tolerant materials in older homes; standard rebuild in newer ones.
See our basement mold remediation steps, delivered from our Eagle Mountain-based basement mold removal team.
Frequently Asked Questions
Can I finish an old cellar in a historic Lehi home?
Often, but treat it as a moisture project first: let masonry walls breathe, add drainage if water comes in, and use materials that tolerate some dampness.
Do older Lehi homes have more mold problems?
They have more ways for moisture to get in — older foundations, cellars and windows — and more remodels that can hide old damage. Newer homes get mold mainly after leaks.
What does mold remediation cost in Lehi?
Most basement jobs cost $1,500 to $7,000. Older homes with masonry or cellars may need extra moisture work.
What is the difference between mold removal and mold remediation?
Removal often means cleaning visible mold. Remediation covers the full job: containment, removal, cleaning, drying, fixing the moisture source and verification.