May arrives in St. Louis and something shifts.

The humidity climbs. The storm alerts start appearing on your phone. The air conditioning that hasn’t run since September is suddenly running all day. And somewhere in a gutter or on a roofline, there’s a problem you didn’t know about all winter that a summer thunderstorm is about to make very expensive.

St. Louis summers are not mild. The combination of heat, humidity, and the severe storm activity that comes with our position in the middle of the country puts real stress on homes — particularly older homes in Kirkwood, Chesterfield, Webster Groves, and the historic neighborhoods closer to the city. The May 2025 EF-3 tornado that caused significant damage across multiple St. Louis neighborhoods was a sharp reminder that summer storm preparation isn’t optional.

The Agape Construction team has been working in and on St. Louis homes for 40 years. Here’s the summer maintenance checklist that actually matters — including the things you can handle yourself and the ones worth calling a professional for before the season gets going.

What Should St. Louis Homeowners Check on Their Roof Before Summer Storm Season?

Before summer storm season begins, check your roof for missing or loose shingles, deteriorated flashing around chimneys and vents, and any areas where previous seasons may have created vulnerabilities. A small repair now costs a fraction of what a storm-driven leak through an unaddressed weak point will cost.

The roof is your home’s first line of defense against everything Missouri summer throws at it — heavy rain, hail, and wind that, in our market, can come with very little warning.

What to look for from the ground with binoculars: missing shingles or shingles with lifted corners, rusted or separated flashing at the chimney, skylight, or roof vents, granule loss on asphalt shingles (shows as bare patches or a significant amount of granules in the gutters), and any sagging sections that indicate structural issues underneath.

From the attic with a flashlight on a bright day: any points where daylight is visible through the roof deck, water staining on roof sheathing or rafters from past events, or damp insulation that signals a slow leak that’s been going on through spring.

When to call a professional: If you’re not comfortable on a ladder, if your roof pitch is steep, if you find anything more significant than a single loose shingle, or if your roof is more than 15–20 years old, a professional inspection is the right call before storm season. A roofing inspection is inexpensive insurance against discovering a major problem after the next hailstorm.

For homes where window and roofline conditions suggest it’s time to think about larger scope work, our team at Agape handles both exterior renovation and handyman-level repairs — the right scope depends on what the inspection reveals.

Why Do Gutters Matter More in St. Louis Than in Drier Climates?

Greater St. Louis averages over 40 inches of rain annually — and summer storms deliver significant portions of that total in intense, concentrated events. Gutters that are clogged, sagging, or improperly draining redirect that water against your foundation, fascia, and basement in exactly the scenarios where you least want additional problems.

A clogged gutter during a normal rain is a nuisance. A clogged gutter during a Missouri thunderstorm that drops two inches in an hour is a foundation event.

What to check before summer:

Clear debris from every gutter section — leaves and cottonwood from spring accumulate fast and form a dam that sends overflow against the house.
Flush each section and downspout with a hose and confirm water flows freely through the outlet and away from the foundation.
Check that downspout extensions direct water at least four to six feet away from the house — short downspouts that end at the foundation are one of the most common causes of basement moisture we see in St. Louis homes.
Inspect gutter brackets and hangers — gutters that have sagged away from the fascia create low points where water pools rather than drains. Resecure or replace loose brackets.

When to call a professional: Gutter replacement in sections that have deteriorated, installation of gutter guards if debris accumulation is a recurring annual problem, or any work that requires ladder access on a two-story home. Our handyman services handle gutter cleaning, minor repairs, and downspout extension installation throughout the Greater St. Louis area.

What Windows and Doors Should St. Louis Homeowners Check Before Summer?

Gaps in window and door seals do two things in a St. Louis summer: they let conditioned air out — which drives up your cooling bill — and they create entry points for wind-driven rain during storms. Summer is the right time to address both before they become expensive problems.

Missouri’s summer humidity makes air sealing particularly consequential. A home with poor window and door sealing works its air conditioning system harder because conditioned air is constantly escaping and warm, humid exterior air is replacing it. This is both a comfort and an energy cost issue.

What to check:

Run your hand around every window and door frame on a hot day — you’ll feel the warm air infiltration at any gap.
Look for cracked or missing caulk at the exterior where the window frame meets the siding.
Check weatherstripping on all exterior doors — it compresses and deteriorates over time, and a door that sealed well two years ago may have a gap now.
Look for daylight under exterior doors when they’re closed.

For St. Louis homes with older windows — a significant portion of Kirkwood, Webster Groves, and the inner-ring suburbs have original or early-replacement windows — deteriorated seals are nearly universal at this point. Every window that’s been in place for more than 15–20 years should be evaluated for seal condition before a summer that will test them with heat expansion, humidity, and storm pressure.

When to call a professional: Caulking is a manageable DIY task for most homeowners. Weatherstripping replacement is also achievable with patience. But windows that have fogged insulated glass (visible haziness between the panes) have failed seals that can’t be repaired — they need replacement. And windows where the frame itself has deteriorated, shifted, or no longer closes properly are a project for a contractor.

Agape’s team handles both window replacement through our Pella Windows service and window-adjacent repairs through our handyman services — the right scope depends on the condition of your specific windows.

How Should St. Louis Homeowners Prepare Their Yard for Summer Storms?

The most common cause of storm-related home damage in the Greater St. Louis area is not wind to the structure itself — it’s wind-driven projectiles from an unprepared yard. Tree branches, outdoor furniture, unsecured equipment, and loose fencing become hazards the moment wind speed climbs.

This is the pre-storm task that saves the most money for the least effort. Walking the yard before storm season and addressing what you find takes a few hours. The alternative is a single storm that drives a loose branch through a window or sends a patio chair into the garage door.

What to address:

Have any large trees with significant overhanging branches over the roof, driveway, or power lines professionally evaluated. Dead branches don’t need a storm to fall — they need only a moderate gust. In St. Louis, where storm wind speeds routinely exceed 50 mph during severe weather events, an arborist assessment before summer is sound maintenance, not overcaution.
Anchor or store outdoor furniture, grills, and equipment. Anything that can become airborne in high wind should either be heavy enough that it won’t move (a stone fire pit table) or light enough that you can bring it inside quickly when weather approaches.
Check fence panels for loose boards or posts — a fence that’s structurally sound is wind-resistant; one with loose sections becomes a projectile assembly waiting on the right gust.

When to call a professional: Any tree work involving large branches over structures or near power lines is professional territory. Agape’s handyman services handle fence repairs and minor yard-related structural work. Large tree work should go to a certified arborist.

What HVAC Maintenance Should Happen Before St. Louis Summer Heat?

A St. Louis summer can deliver weeks of temperatures above 90 degrees with high humidity — conditions that push air conditioning systems to their limits. Air conditioning that hasn’t been serviced since last summer is running on filters and coils that will reduce efficiency and increase operating cost from day one of hot weather.

The two things homeowners can do themselves that have the most impact:

Replace or clean the air filter. A clogged filter restricts airflow, which forces the system to work harder to move the same volume of air through the house. A clean filter at the start of summer costs a few dollars and meaningfully improves efficiency throughout the season. Check your system’s filter monthly during peak cooling months — a filter that was clean in June may be significantly restricted by August.

Clear the outdoor condenser unit. The condenser needs clear airflow to reject heat effectively. Remove any vegetation, debris, or objects within two feet of the unit on all sides. Gently rinse the condenser fins with a garden hose (power off first) to remove the cottonwood, pollen, and debris that accumulates through spring.

When to call a professional: Annual AC tune-ups — which include refrigerant level check, electrical component inspection, coil cleaning, and overall system performance assessment — are the professional complement to the owner-level filter and condenser maintenance. A system that hasn’t been professionally serviced in several years, or one that’s showing signs of reduced cooling capacity or longer-than-normal run times, benefits significantly from professional service before the hardest-running months of the year.

For homes where the AC is aging significantly — systems more than 12–15 years old showing performance issues — summer is the right time to have that conversation before the system fails during a heat wave. Our team works with trusted HVAC partners throughout the St. Louis area and can advise on what scope is appropriate for your specific system.

What Should You Check in the Basement Before Summer Rain Season?

Greater St. Louis receives significant summer rainfall, and basement water intrusion is one of the most common and costly home damage issues in the region. Summer is the right time to test your sump pump, inspect foundation walls, and verify that grading and drainage are directing water away from the house — before the next major storm tests them.

Missouri’s clay-heavy soils — particularly in St. Louis County and surrounding areas — have low permeability. Water that can’t absorb into the ground runs toward the lowest point available, which is often your foundation. This is why basement water issues are endemic in St. Louis homes even in years without unusual rainfall.

What to test before storm season:

Test your sump pump by slowly pouring water into the pit. It should activate automatically and pump the water out within a minute. A pump that doesn’t respond, or one that runs continuously without effectively removing water, needs attention before it fails during a significant storm event. If your pump is more than five to seven years old and has never been tested, test it now.
Check that the soil grade around your foundation slopes away from the house. Water that pools against the foundation wall will eventually find a path through it. If the grade has settled toward the house in any area, adding soil to restore proper slope is a straightforward maintenance task.
Look for hairline cracks in basement walls that have developed since your last inspection. Minor cracks can be filled with hydraulic cement. Larger cracks, horizontal cracks, or cracks with stair-step patterns in block foundations indicate structural movement that warrants professional evaluation.

When to call a professional: Any significant crack pattern, water intrusion that’s recurring after addressing surface drainage, or a sump pump system that needs replacement. Our handyman services address minor basement-related repairs. More significant waterproofing or structural concerns are within the scope of our remodeling team.

What Items Should Every St. Louis Homeowner Have Ready Before Storm Season?

Emergency preparedness for St. Louis summer storms means having a kit assembled before you need it — because assembling it during a tornado watch isn’t when you want to be locating flashlight batteries.

The items that matter most for a Greater St. Louis household:

Power and light: Multiple flashlights with fresh batteries, a battery-powered or hand-crank weather radio (cell service is often congested during major weather events), and a power bank for phones charged and ready.
Important documents: Insurance policy numbers and your agent’s contact information, accessible in a waterproof bag or photographed to cloud storage. After the May 2025 tornado, homeowners who had their insurance information immediately accessible began their claims process significantly faster than those who had to search for paperwork amid the disruption.
Basic supplies: Three to seven days of water and non-perishable food for each household member, a first-aid kit, and any prescription medications kept in supply.
Generator: If you have one, test it now — run it for 15 minutes with a load connected, confirm the fuel supply, and verify it starts reliably. Carbon monoxide risk means generators run outdoors only, at a safe distance from windows and doors.
Emergency contacts on paper: Not just in your phone. A handwritten or printed card with your insurance agent, a trusted contractor for storm damage response, and utility company emergency numbers posted somewhere visible. Cell networks overload during major storm events; having physical backup matters.

FAQ: Summer Home Maintenance in Greater St. Louis

How often should I clean gutters in St. Louis?

Twice yearly is the minimum for most St. Louis area homes — once in late fall after leaf drop and once in spring after cottonwood and pollen season. Homes with significant tree coverage may need quarterly cleaning. Before summer storm season specifically, confirming gutters are clear and properly draining is worth the 30–60 minutes it takes.

What does Agape’s handyman service cover for summer maintenance?

Our handyman services cover a wide range of smaller-scale maintenance and repair tasks — gutter cleaning and minor repairs, weatherstripping and caulking, fence repairs, window screen repair, minor carpentry, and similar work. For projects that scope into remodeling or significant structural work, our full design-build team handles those. A consultation establishes which scope is right for your specific needs.

How do I know if my older St. Louis home’s windows need replacement vs. repair?

Windows with failed seals (fogging between glass panes), frames that have deteriorated or no longer close properly, or windows that are consistently the source of cold drafts in winter and hot air infiltration in summer are typically candidates for replacement rather than repair. Our team can assess your specific windows and provide an honest recommendation. As an authorized Pella dealer, Agape handles both supply and professional installation.

What’s the right way to test a sump pump?

Pour a slow, steady stream of water directly into the sump pit — typically a few gallons is enough. The pump should activate automatically once the water level reaches the float trigger, pump the water out, and shut off automatically. If it doesn’t activate, if it runs but doesn’t reduce the water level, or if it makes unusual sounds, it needs service or replacement before the next significant rain.

Are there summer maintenance tasks specific to historic St. Louis homes?

Yes. Older St. Louis homes — particularly those in Kirkwood, Webster Groves, Glendale, Soulard, Lafayette Square, and similar neighborhoods — often have original or early-replacement windows with deteriorated glazing compound, older masonry that needs repointing, and wood trim that needs annual inspection and painting to prevent moisture penetration. These homes reward more frequent inspection and maintenance attention than newer construction. Agape has significant experience in St. Louis’s historic neighborhoods and understands the maintenance requirements specific to older construction.

When is the right time to schedule contractors for summer maintenance work?

Before summer. HVAC companies, roofers, and general contractors in the St. Louis area see scheduling fill up as spring turns to summer and demand for maintenance and repair work peaks. Scheduling inspections and any needed work in April and May gives you better scheduling flexibility than waiting until July when every contractor is booked.

Summer Maintenance Done Right Means Less Summer Drama

The homes that come through St. Louis summers — and St. Louis storm seasons — without expensive surprises are the ones where the maintenance happened before the weather arrived.

Forty years of working on St. Louis homes has given Agape Construction a clear picture of what fails and when. The summer checklist above represents the areas where proactive attention consistently prevents reactive expense.

If your summer checklist reveals things that need a professional — whether that’s a handyman-scale repair or a larger remodel-level project — we’re here to help.