How St. Louis weather wears out a roof
St. Louis sits where hot, humid Gulf air meets cold air from the Plains, and the result is a climate that is hard on roofs. Spring and early summer bring severe thunderstorms with hail and damaging straight-line winds across St. Louis County, St. Charles County and the Metro East. Summers push attic temperatures well above the outdoor air, slowly drying out asphalt. Winters rarely stay frozen; they cycle above and below freezing again and again, which drives water into small gaps and widens them.
Each of those forces attacks the roof differently. Hail bruises the shingle mat and knocks off the granules that protect the asphalt from UV light. Wind breaks the adhesive seal and lifts shingles. Heat ages the shingle from the underside. Freeze-thaw cycles work on flashing and create ice dams at the eaves. Our article on ice dams and freeze-thaw damage goes deeper on the winter side.
Permits and rules across the St. Louis metro
Missouri has no statewide roofing license; permits and contractor registration are handled locally. St. Louis City, unincorporated St. Louis County and the dozens of municipalities in the county — plus St. Charles County cities such as O’Fallon and St. Peters — each set their own requirements, and historic districts may review visible materials and colors. A professional roofer knows which permit your address needs and pulls it in the company’s name. If a contractor asks you to pull the permit yourself, ask why.
Roofing materials that hold up in St. Louis
- Architectural asphalt shingles — the most common choice for St. Louis homes, with good wind ratings and a wide color range.
- Impact-resistant shingles — worth considering in hail-prone areas; some insurers may offer premium credits, so ask your agent.
- Designer shingles — slate- or shake-style asphalt for older or high-end homes.
- Metal roofing — long-lived and strong in wind, used on some homes and many outbuildings.
- Low-slope systems (TPO, EPDM, modified bitumen) — for flat roofs on porches, additions, city row homes and commercial buildings.
Whatever the material, the details under it — underlayment, ice and water shield, flashing and ventilation — decide how long it lasts here.
When is the best time to replace a roof in St. Louis?
Spring through fall is the busiest season, but St. Louis roofing is not limited to summer. Shingles seal best in warm weather, and on cold days crews can hand-seal shingles to make sure they bond. The bigger timing issue is demand: after a major hail event, schedules fill quickly. If your roof is aging but not leaking, booking an inspection in late summer or fall often gets you a faster start date before winter. Our winter preparation checklist covers what to check before the cold arrives.
What affects the cost of a roof in St. Louis
- Size of the roof, measured in squares (100 square feet each).
- Pitch and complexity — steep slopes, valleys, dormers and multiple stories take more labor.
- Number of existing layers to tear off.
- Decking condition — rotted or soft sheets must be replaced.
- Shingle line — standard architectural, impact-resistant or designer.
- Flashing and ventilation upgrades, skylights and chimneys.
- Permits and disposal.
The only accurate number comes from measuring your roof. We provide free, written, itemized estimates and back them with our Best Value Guarantee.
Signs your St. Louis roof needs attention
- Curling, cracking or missing shingles.
- Granules collecting in gutters or at downspouts.
- Stains on ceilings or in the attic.
- Daylight visible through attic boards.
- A roof that is near the end of its expected life or was hit by hail.
You can check all of these from the ground or the attic. Leave the roof itself to a professional.
A St. Louis roofing company since 1947
John Beal Roofing is a family-run St. Louis roofing company headquartered at 12181 Prichard Farm Road in Maryland Heights. We have been roofing homes and businesses here since 1947, have served more than 50,000 customers, and handle residential and commercial roofing, roof repair, storm damage, insurance claims and gutters. Call 1-800-564-6232 any hour, or see the areas we cover on our service area page.
Roofs across St. Louis neighborhoods
Roofing in St. Louis looks different depending on where you live. In the city — Soulard, Lafayette Square, Tower Grove and the Central West End — many homes are brick with steep main roofs, original chimneys and flat or low-slope rear additions, so a single job may need both shingles and a membrane system plus careful chimney flashing. In North County communities such as Florissant and Hazelwood, mid-century ranches with simple gable roofs are common and often on their second or third roof. In west and south county, larger two-story homes have multiple valleys, dormers and skylights, which means more flashing detail. In St. Charles County, newer subdivisions often have builder-grade roofs reaching the age where replacement is due. A St. Louis roofer who works across all of these knows what to look for on each one.
Hail season in St. Louis: what to do after a storm
When hail hits part of the metro, the first few days bring a wave of door-knockers. Take a breath. Photograph any damage you can see from the ground, check gutters and downspouts for dents and granules, and look at soft metals such as vents and window wraps for fresh dings. Then schedule a free inspection with a local roofer and decide on an insurance claim with real information in hand. Our guide to spotting and documenting hail and wind damage walks through the steps, and our storm damage page explains how we document a roof for your insurer.
Commercial and flat roofs in St. Louis
Roofing in St. Louis is not only shingles. Warehouses, churches, retail centers, apartment buildings and city row homes often have low-slope roofs covered with TPO, EPDM or modified bitumen. These systems handle the same hail, heat and freeze-thaw cycles in different ways, and drainage is the main concern — standing water shortens their life. Regular spring and fall inspections, clear drains and quick repairs to seams and flashing keep a flat roof going. Our commercial roofing page covers the options in more detail.
Frequently asked questions
What is the biggest threat to roofs in St. Louis?
Hail and severe thunderstorm wind cause the most sudden damage, while summer heat and repeated freeze-thaw cycles age roofs over time. A well-installed system with good flashing and ventilation handles all of them best.
Do I need a permit to replace my roof in St. Louis?
Many St. Louis-area cities and St. Louis County require a permit for a re-roof. Requirements vary by municipality, so your contractor should confirm and pull the permit for your address.
Can you replace a roof in St. Louis in the winter?
Yes, on suitable days. Crews can hand-seal shingles in cold weather. Snow, ice and very low temperatures may pause work, but much of the winter is workable.
Are impact-resistant shingles worth it in St. Louis?
In hail-prone parts of the metro they can be worth considering. Ask your insurance agent whether your policy offers a premium credit for impact-rated shingles.
How much does a new roof cost in St. Louis?
Cost depends on roof size, pitch, layers, decking condition, the shingle line and flashing or ventilation work. A free, measured, written estimate is the only accurate number.