In Collinsville, the 2021 I-Codes are in force and 17% of the 11,644 homes went up before 1940. We replace and repair roofs here and inspect after hail, starting with a free, photographed inspection.
Collinsville runs to about 15.4 square miles and roughly 24,031 people. It sits about 12 miles east of downtown St. Louis. The community dates back to 1850. We cover ZIP code 62234.
No completed roof in Collinsville is logged in our job records yet.
Collinsville's housing is mostly mid-20th-century, and only about 17% of its homes predate 1940.
German-American settlers arrived in Collinsville by Conestoga wagon in 1812. The town adopted a village charter in 1850 and became a city in 1872. The Brooks Catsup Bottle water tower, listed on the National Register of Historic Places, is the city's best-known historic structure.
The postwar housing in Collinsville is mostly simple to roof, which is why it gets done badly so often. Decking is usually 1x6 boards or early plywood, still sound but worth walking rather than assuming. The recurring problems are the low-slope sections — porch roofs, carport tie-ins, the flat bit over an addition — where a shingle was installed below its rated pitch and has been failing quietly ever since. Attic ventilation on houses of this era is also routinely short of what current shingle warranties require, and under-venting cooks a roof from underneath. We measure intake against exhaust before we quote rather than just nailing on a ridge vent and calling it solved.
Collinsville has 11,644 homes in the Census Bureau's count and a median year built of 1971. 1,970 of them (17%) went up before 1940 — 12th of 48 places on this site for pre-1940 share — and 1,670 (14%) in 2000 or later. More of today's homes date from before 1940 than from any decade since. (Madison County as a whole: 15% before 1940.)
About 25 years is the usual working life of a roof, by the figure Missouri's insurance department publishes. That puts 9,974 homes in Collinsville, the 86% built before 2000, past at least one full roof life; 5,709 of them (49%) predate 1970, old enough for two replacements already. First replacements are arriving on the 1,151 homes built in the 2000s, while the 519 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.
By building type: 7,723 detached houses (66%), 655 attached (6%). 1,938 homes (17%) sit in two- to nine-unit buildings and 928 (8%) in buildings of ten units or more, where the roof is usually a landlord's or an association's decision. The count also takes in 400 mobile homes, which are a different kind of roof job. Owners live in 66% of the 11,061 occupied homes. Read together, those figures point toward full tear-offs on houses past two roof lives, deck and flashing checks on pre-war board sheathing and flat and low-slope sections, which turn up more on attached and multi-unit buildings.
| Built | Homes | Share | |
|---|---|---|---|
| Before 1940 | 1,970 | 17% | |
| 1940s | 723 | 6% | |
| 1950s | 1,427 | 12% | |
| 1960s | 1,589 | 14% | |
| 1970s | 1,441 | 12% | |
| 1980s | 1,649 | 14% | |
| 1990s | 1,175 | 10% | |
| 2000s | 1,151 | 10% | |
| 2010s | 490 | 4% | |
| 2020 or later | 29 | 0% |
Census ACS 2020–2024, tables B25034, B25035, B25024 and B25003: 11,644 homes, 11,061 occupied. Survey estimates.
From 2016 through 2025, NOAA’s Storm Prediction Center recorded 15 reports of hail of 1 inch or more within 5 miles of Collinsville’s center, spread over 13 storm days. 5 of them were 1.75 inches or larger. The largest, 2 inches, came on April 30, 2019, about 0.5 miles southeast of the center. The most recent was 1.5 inches on March 14, 2025. These are reports, not a full record: they come from spotters and the public, so busier areas log more.
| Latest reports | Size | From center |
|---|---|---|
| March 14, 2025 | 1.5 inches | 0.4 mi NE |
| March 14, 2025 | 1.75 inches | 4.5 mi NE |
| May 26, 2024 | 1.75 inches | 3.4 mi NW |
| March 14, 2024 | 1 inch | 3 mi SW |
| July 17, 2023 | 1 inch | 2.8 mi SW |
Hail damage rarely shows from the ground; a storm inspection photographs each slope so you know either way.
A re-roof needs a permit here. The city describes its 'Limited' or 'U' Permit as 'used for roofing, siding, windows, above ground pools, fences, sheds, etc.' Roofing is handled under that permit.
Collinsville enforces the 2021 I-Codes. The city states: 'As of January 1, 2025, the City of Collinsville adopted the 2021 ICC Codes.' That is the same date Illinois' statewide baseline building code requirement took effect.
The published number is 618-346-5200. The building official on record is Kendrick Soer, Chief Building Official (618-346-5200 x1123). The department page is here.
Collinsville shares the metro's figures: 115 mph design wind, 20 psf ground snow. The code guide explains both.
Collinsville borders Maryville, Pontoon Beach, Fairmont City and Caseyville.
Also in Madison County:
| City | Re-roof permit | Code | Median built |
|---|---|---|---|
| Collinsville | Yes | 2021 I-Codes | 1971 |
| Alton | Not published | 2021 IRC | 1953 |
| Edwardsville | Not published | 2021 IRC | 1986 |
| Glen Carbon | Not published | Not published | 1990 |
| Granite City | Not published | 2012 IRC | 1957 |
All 5 Madison County cities side by side →
A re-roof needs a permit here. The city describes its 'Limited' or 'U' Permit as 'used for roofing, siding, windows, above ground pools, fences, sheds, etc.' Roofing is handled under that permit.
Collinsville enforces the 2021 I-Codes. The city states: 'As of January 1, 2025, the City of Collinsville adopted the 2021 ICC Codes.' That is the same date Illinois' statewide baseline building code requirement took effect.
Older than most people guess: the Census puts 86% of Collinsville's homes before 2000 and 49% before 1970, with a median year built of 1971 (2020–2024 estimates). A roof usually lasts about 25 years, so the deck and the layers get checked before any quote.
Yes. The most recent report of hail 1 inch or larger within 5 miles of Collinsville's center was 1.5 inches on March 14, 2025, one of 15 such reports from 2016 through 2025.
The building official on record is Kendrick Soer, Chief Building Official. The department's own number is on this page, beside its name.
Not yet: no completed roof in Collinsville 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.collinsvilleil.org · www.collinsvilleil.org · library.municode.com · en.wikipedia.org · www.ci.collinsville.il.us · censusreporter.org · www.point2homes.com · data.census.gov · www.spc.noaa.gov. Rules and staff change; check with the jurisdiction.
