Roof replacement, leak repair and hail & storm damage for homes in Waterloo. In Waterloo, the 2006 IRC is in force and 11% of the 4,818 homes went up before 1940. It starts with a free inspection that photographs every slope.
Waterloo runs to about 8.18 square miles and roughly 11,013 people. It sits about 24 miles south of downtown St. Louis. The community dates back to 1889. We cover ZIP code 62298.
No completed roof in Waterloo is logged in our job records yet.
Downtown keeps a 19th-century core recognized as the Waterloo Historic District, listed on the National Register on December 1, 1978. That core reflects the town's 1818 founding as a merger of two rival settlements, Bellefontaine and Peterstown.
That includes Bellefontaine and Peterstown. Housing age and construction shift across Waterloo, sometimes by decades within a few streets, which is why we look at the roof before we quote rather than after.
Waterloo formed in 1818 from the unification of two rival communities, Bellefontaine to the south and Peterstown to the north. It is the Monroe County seat.
From this stretch of building, houses in Waterloo sit on plywood or OSB, were first roofed in three-tab shingles, and are mostly on their second roof now. Trouble tends to be at the penetrations rather than across the field: the rubber collar on a pipe boot splits years before the shingles give out, and it is the leak we trace most often. Ridge vents were hit and miss in these decades, and OSB that stays damp for a season softens in a way plywood does not, something you feel underfoot rather than see from the yard.
By the Census Bureau's estimate there are 4,818 homes in Waterloo, with a median year built of 1991. 507 of them (11%) went up before 1940 — 15th of 48 places on this site for pre-1940 share — and 1,656 (34%) in 2000 or later. The 2000s were the busiest decade, adding 908 of today's homes (19%). That is above Monroe County's 10%.
Missouri's Department of Commerce and Insurance puts the useful life of a roof at usually about 25 years. On that yardstick the 3,162 homes in Waterloo built before 2000 (66%) have outlived at least one roof, and 35% (1,664 homes) go back before 1970, two roof lives and more. First replacements are arriving on the 908 homes built in the 2000s, while the 748 built since 2010 are mostly still on the roof they were built with. On houses that old, the question worth asking is how many layers are up there: a roof laid over an old one hides the deck.
Detached single-family houses make up 78% (3,746); attached houses and townhouses 5% (224). 598 homes (12%) sit in two- to nine-unit buildings and 250 (5%) in buildings of ten units or more, whose roofs are normally an owner's or a board's call rather than a resident's. 78% of occupied homes are owner-occupied, 22% rented. On a housing mix like this, the likely work is first replacements on 2000s builder-grade shingles, flat and low-slope sections, which turn up more on attached and multi-unit buildings and hail checks on newer roofs that look fine from the driveway.
| Built | Homes | Share | |
|---|---|---|---|
| Before 1940 | 507 | 11% | |
| 1940s | 187 | 4% | |
| 1950s | 433 | 9% | |
| 1960s | 537 | 11% | |
| 1970s | 439 | 9% | |
| 1980s | 248 | 5% | |
| 1990s | 811 | 17% | |
| 2000s | 908 | 19% | |
| 2010s | 729 | 15% | |
| 2020 or later | 19 | 0% |
Census ACS 2020–2024, tables B25034, B25035, B25024 and B25003: 4,818 homes, 4,491 occupied. Survey estimates.
From 2016 through 2025, NOAA’s Storm Prediction Center recorded 2 reports of hail of 1 inch or more within 5 miles of Waterloo’s center, spread over 2 storm days. None was 1.75 inches or larger. The largest, 1 inch, came on May 27, 2021, about 0.8 miles south of the center. These are reports, not a full record: they come from spotters and the public, so busier areas log more.
A bruised shingle can look fine for a season or two, which is why a storm inspection after a date like these is worth having.
The city's building permits page lists the projects that need permits: principal buildings, accessory buildings 50+ sq ft, pools, decks and retaining walls over 4 ft. Re-roofing is not on that list, which suggests no permit is needed, but the city does not state an exemption. We confirm the re-roof permit requirement with the city before work starts.
Waterloo enforces the 2006 IRC. The city has adopted the 2012 International Building Code with revisions and the 2006 International Residential Code with revisions, plus the 2012 International Mechanical Code, the National Electric Code, the National Fuel Gas Code and the Illinois State Plumbing Code. The 2006 residential code is one of the oldest editions in the St. Louis area.
The published number is 618-939-8600. Nathan Krebel is listed as the city's Zoning Office contact. The department page is here.
Wind 115 mph (ultimate) and ground snow 20 psf, the same across the metro; see the roofing code guide for what they govern.
Also in Monroe County:
| City | Re-roof permit | Code | Median built |
|---|---|---|---|
| Waterloo | Not published | 2006 IRC | 1991 |
| Columbia | No | Not published | 1991 |
All 2 Monroe County cities side by side →
The city's building permits page lists the projects that need permits: principal buildings, accessory buildings 50+ sq ft, pools, decks and retaining walls over 4 ft. Re-roofing is not on that list, which suggests no permit is needed, but the city does not state an exemption. We confirm the re-roof permit requirement with the city before work starts.
Waterloo enforces the 2006 IRC. The city has adopted the 2012 International Building Code with revisions and the 2006 International Residential Code with revisions, plus the 2012 International Mechanical Code, the National Electric Code, the National Fuel Gas Code and the Illinois State Plumbing Code. The 2006 residential code is one of the oldest editions in the St. Louis area.
The Census Bureau's 2020–2024 estimates put the median year built at 1991: 11% of Waterloo's 4,818 homes predate 1940 and 34% were built in 2000 or later. At the usual 25-year roof life, 66% have needed at least one new roof already.
2 reports of 1-inch-plus hail fell within 5 miles of Waterloo between 2016 and 2025, the biggest 1 inch on May 27, 2021 (NOAA Storm Prediction Center).
It can. Waterloo has Waterloo Historic District. Inside a designated district, changing a visible roof material or color can need preservation review before the permit is issued. Like-for-like replacement usually raises fewer questions, but we check before quoting.
Not yet: no completed roof in Waterloo is in our job records, so this page shows no job count.
Researched 2026-09-09; housing, Census ACS 2020–2024; hail, NOAA SPC. Sources: www.waterloo.il.us · www.waterloo.il.us · monroecountyil.gov · en.wikipedia.org · www.city-data.com · data.census.gov · www.spc.noaa.gov. Rules and staff change; check with the jurisdiction.
