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Guides
Each guide answers one question and then shows where it matters most, using the same county data as the rest of the site.
| Crawl space encapsulation | What sealing a crawl space does, what building codes allow, published cost ranges, and the US counties where a shallow water table sits under the most land. | Updated September 2026 |
| Crawl space encapsulation cost | Crawl space encapsulation costs $5,000 to $15,000 for most jobs ($3 to $7 a sq ft). Prices by size and part, DIY vs pro, with dated sources. | Updated October 2026 |
| Basement flooding | Where water gets into basements, and the counties where FEMA flood records since 2016 fall most often on buildings with basements. | Updated September 2026 |
| Wet basements | Why basements get wet (surface water, groundwater, humidity), the fixes agencies recommend, and the counties where USDA rates a shallow water table a limit for basements on the most land. | Updated September 2026 |
| Crawl space moisture and humidity | Normal crawl space humidity: EPA's 60% target, the 70% level where mold grows, what a sealed crawl space does, and the 275 counties with a shallow water table and 50+ inches of rain. | Updated October 2026 |
| Foundation watering | Why clay soil under a slab needs even moisture, what water utilities and extension services advise, and the clay counties in drought on this week's Drought Monitor map. | Updated September 2026 |
| Signs of foundation problems | The signs engineers and extension services list, which cracks are normal, and the counties where USDA rates shrink-swell clay a limit on the most land. | Updated September 2026 |
| Foundation crack repair | Hairline cracks are mostly cosmetic; horizontal, tapered or offset ones mean movement. 525 Texas cities sit mostly on swelling clay. Repairs, 14 price ranges. | Updated September 2026 |
| Foundation drains | A foundation drain carries groundwater from the footing to daylight or a sump. What the 2024 IRC requires, why drains fail, published prices, and the 1,061 counties with a shallow water table under most land. | Updated October 2026 |
| Foundation inspection cost | What a structural engineer's foundation evaluation covers, how it differs from a home inspection, and published cost ranges with their sources. | Updated September 2026 |
| Pier-and-beam foundation repair cost | Pier-and-beam foundation repair costs $2,000 to $15,000 a job (median of 5 published guides; extremes $700 to $25,000), $1,000 to $3,000 a pier. What the repairs are, Houston, Dallas and Columbus figures, and sources. | Updated October 2026 |
| Foundation repair cost | Foundation repair costs $2,000 to $8,600 a job in 8 published guides, averaging $3,843 to $5,400; $1,000 to $3,200 a pier. Texas and Ohio city prices, and where clay soil is common. | Updated October 2026 |
| Basement waterproofing cost | Published cost ranges for interior and exterior basement waterproofing, sump pumps and French drains, with their sources, and where shallow water tables are most common. | Updated September 2026 |
| Sinking foundation and house settling | When a settling house is normal and when it is not, what settlement cracks look like, repair costs, and the 194 US counties with swelling clay that spent over half the past year in drought. | Updated October 2026 |
| Sump pump cost | Published sump pump installation prices from 8 cost guides, each with its date, what the price buys, and the 106 counties where a shallow water table and basements are most common. | Updated October 2026 |
| What soil is my house built on? | Four ways to look up the soil under a house, from ZIP code to lot, and the 766 US counties where shrink-swell clay covers over a quarter of the land. | Updated October 2026 |
| How to tell if your house is on expansive clay | Four checks for expansive clay under a house: county rating, USDA soil map, signs on the house, lab test. 287 US counties are over half shrink-swell clay. | Updated October 2026 |
| Soil test before building a house | What a soil test before building tells you, what it costs, and how to read the free USDA map first. 766 US counties are flagged for clay. | Updated November 2026 |