Roofing Contractor St. Louis MO

St. Louis has the oldest housing stock of any major American city, and every roofing rule here has to be read against that fact.

The median year of construction in the City of St. Louis is 1938. Some 100,811 housing units — 57.9 percent of the city — were built before 1940. For comparison, Denver has fewer than 61,000 pre-1940 units, which is 16.9 percent of its stock. St. Louis has fewer than half Denver’s homes in total and nearly twice as many very old ones.

That matters immediately, because of how the permit rule is written. A like-for-like re-roof in the City of St. Louis is exempt from permitting — unless the material changes, or unless more than 25 percent of the sheathing is replaced. On a house built in 1938, crossing that quarter-of-the-deck threshold mid-tear-off is not a remote scenario. It is a live possibility on a good proportion of jobs. So we quote decking as a unit rate up front and tell you where the permit line sits, because discovering both at once with the roof open is nobody’s idea of a good morning.

There is a second, harder trigger. In any of the city’s eighteen local historic districts — Soulard, Lafayette Square, Benton Park, Central West End, Hyde Park, Tower Grove East and the rest — the rule is blunt: you need a permit for all exterior work except painting wood trim. That overrides the re-roof exemption entirely. Visible sloped roofs must be replaced in kind, and parapet work always requires a permit regardless of district. Cultural Resources Office staff approval runs about five working days; anything that goes to the Preservation Board waits for a monthly meeting. Those timelines belong in the schedule from the start.

The city runs the 2018 I-codes, adopted 1 August 2018, with a 20 psf ground snow load, 115 mph design wind and seismic design category C. And here is the counter-intuitive one, which we checked carefully because it matters in a freeze climate: ice barrier is not required. City Ordinance 70795 states it outright — ice shield underlayment, not required. We read the full ordinance to be sure it was not reinstated elsewhere. Our view is that the code floor and good practice part company here, and on a north-facing slope over a century-old attic we will recommend self-adhering membrane at the eaves and explain why.

Missouri has its own version of Colorado’s roofing statute, and the detail differs in a way that catches people out. Under RSMo 407.725 you may cancel a residential roofing contract when your insurer gives notice that the claim is not covered — but the clock runs to midnight on the fifth business day after that notice, where Colorado gives 72 hours. Two states, two contract templates, two deadlines. We use the right one.

A practical note on debris that is unique to this city: St. Louis refuse service is closed to commercial waste and to hauling-for-hire. There is no route by which your tear-off leaves on a city truck. Disposal has to be priced into the job properly rather than bolted on, and any bid that looks light is worth a second read.

On weather, St. Louis peaks in May with an odd secondary spike in March. The event that dominates the recent record is the tornado of 16 May 2025: $1.6 billion in damage in the City, four deaths and thirty-eight injuries. One data caution we will pass on because it trips up claim narratives — NCEI records that tornado’s scale field as EF0 while its own narrative describes EF-3. The narrative is the reliable part. The same applies to wind magnitudes, which the database records in knots, not miles per hour.