When were most Sioux City homes built?

Based on U.S. Census Bureau survey data, half of Sioux City homes were built by 1955. Homes from before 1960 are about 57 percent of the total, and homes from 2000 on are about 7 percent.

Which ZIP codes in Sioux City does Epp cover?

Sioux City addresses in ZIP codes 51054, 51101, 51103, 51106 and 51111 are covered by the Norfolk office.

The Epp Foundation Repair crew in front of the company's service trucks

Sioux City, IA · Crawl Space Encapsulation · Since 1994

Crawl Space Encapsulation in Sioux City, IA

A sealed liner, closed vents and a dehumidifier sized to the space, installed as one system for Sioux City crawl spaces and the rest of Woodbury County. Our Norfolk office is 62 miles away, a drive of about 80 minutes.

Let's take the first step toward a healthy home.

A local specialist will inspect your foundation, walk you through the findings, and send a clear estimate, no cost, no pressure.

BBB Accredited

Registered & Insured

"By Your Side" Guarantee

Norfolk office

1105 S 13th St

Ste 205, Norfolk, NE 68701

Phone

(402) 792-4092

Hours

Monday to Friday, 7:30 AM to 5:00 PM

Getting to you

About 80 minutes from the office, 62 miles.

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Crawl Space Encapsulation in Sioux City

Crawl Space Encapsulation near you in Sioux City

Sioux City lies inside Woodbury County in Iowa. Census figures put the town at about 85,469 residents and 32,449 households. 65 percent of occupied homes are owner occupied, and 24,435 of them are detached single family houses.

Work here is served from the Norfolk office, about 80 minutes away at 62 miles. Half the housing predates 1955, and the years before 1940 were the busiest building years at 10,913 homes. A median home value of $149,800 and a median household income of $64,250 is what the American Community Survey records. 21,227 of those homes are lived in by their owners and 11,222 are rented. Roughly 86 percent of the housing here, 27,823 homes, went up before 1980, when footing drains and grade separations were not what they are now.

Population and housing figures: American Community Survey, by way of the Signature Media market data set.

The sealed system

How does crawl space encapsulation work in Sioux City?

The typical Sioux City house was built in 1955. In a crawl space that age, open vents and a bare dirt floor let damp air and ground moisture reach the floor framing. Epp's Norfolk crew seals it as one system: a reinforced crawl space liner over the dirt floor, closed vents, and a dehumidifier sized to the space. The system targets damp air and sweating ducts in the crawl; settled posts or a sagging floor are crawl space repair in Sioux City, and that work is done first.

Problem signs

Crawl space encapsulation problem signs we fix in Sioux City

Sioux City housing

When were Sioux City homes built?

Based on U.S. Census Bureau survey data, about 57 percent of the 34,422 homes in Sioux City were built before 1960, and about 81 percent before 1980. The median home dates to 1955.

In an older crawl space, a thin plastic sheet laid years ago can tear and pull apart at the seams. The inspection checks the cover on the soil, the vents and any water on the floor.

Based on NOAA 1991 to 2020 climate normals for Sioux City Gateway Airport, about 7 miles away, the average July dew point is 65 degrees and precipitation averages 29.3 inches a year. Summer air that comes in through open crawl space vents can leave water on any pipe, duct or joist cooler than 65 degrees.

Sioux City homes by year built
Built	Homes	Share
Before 1940	10,913	32%
1940s	3,420	10%
1950s	5,341	16%
1960s	3,868	11%
1970s	4,281	12%
1980s	1,606	5%
1990s	2,547	7%
2000s	1,329	4%
2010s	998	3%
2020 on	119	0%

Source: U.S. Census Bureau, American Community Survey, year structure built, for the city of Sioux City. Counts are housing units. Climate: NOAA U.S. Climate Normals 1991 to 2020, SIOUX CITY GATEWAY AP (USW00014943); July dew point averaged from the hourly normals at SIOUX CITY GATEWAY AP (USW00014943), retrieved September 30, 2026.

"Homeowners tell me their furnace can't keep up. I climb into the crawl space and find the answer in 10 minutes. There's a 25-degree wind blowing under the house every January. Fix that and the furnace catches up just fine."

Dave Epp

President, Epp Foundation Repair

What we install

Crawl Space Encapsulation solutions for Sioux City homes

Each item below is one part of the same sealed system, and the inspection decides which parts a Sioux City crawl space needs.

Cost and scope

What does crawl space encapsulation cost in Sioux City?

Pricing depends on the size of the crawl, how much water gets in, and whether drainage or a sump goes in first. The free inspection ends with a Customized Repair Estimate that states the scope and the price.