Houston Summer Home Maintenance Checklist: 15 Tasks Before the Heat Hits

Have a licensed HVAC tech inspect coils, check refrigerant levels, clean the drain line, test capacitors, and verify airflow. In Houston's humidity, the drain line clogs almost every year — a clogged drain causes water damage inside your walls before you notice it. Schedule this in April or early May before demand spikes and wait times stretch to two weeks. CenterPoint Energy customers: check for rebates on high-efficiency tune-up services.

A clogged filter makes your AC work harder, raises your electricity bill, and can freeze the evaporator coil. In Houston summers, swap filters every 30 days — not every 90. Dust, pollen, and mold spores are relentless from June through September. Use a MERV-8 or higher filter. Stock up in May so you're not hunting for the right size at Home Depot in August.

Turn off the unit at the breaker, then gently rinse the condenser fins with a garden hose from the inside out. Clear any grass clippings, leaves, or debris from within 2 feet of the unit. Overgrown vegetation blocks airflow and makes your system run hot. If fins are bent or heavily fouled, a tech can clean and straighten them during the tune-up. A clean condenser can cut cooling costs 5–10%.

Houston attics hit 140–160°F in July. Without proper ventilation, that heat radiates into your living space and forces your AC to work overtime. Check that ridge vents and soffit vents are clear of insulation and debris. If your attic insulation is below R-30, adding blown-in insulation pays for itself in 3–5 years through lower electric bills. This is one of the highest-ROI summer upgrades in Houston.

During dry spells — which happen even in "rainy" Houston summers between storms — run a soaker hose around your foundation's perimeter 2–3 times per week. Keep the soil consistently moist, not saturated. The goal is to prevent the clay from shrinking and pulling away from your slab. A $30 soaker hose and a $15 timer is the cheapest foundation maintenance you'll ever do. Compare that to a $15,000 pier-and-beam repair.

Houston's summer storms dump 2–6 inches of rain in a few hours. Clogged gutters send that water straight down your foundation walls. Downspouts should extend at least 6 feet from your foundation — 10 feet on flat lots. Clean gutters in May (before storm season) and again in October. Check that extensions haven't been kicked loose over winter. A proper gutter system is the first line of defense against both foundation and basement moisture damage.

Walk your yard after a heavy rain. Water should flow away from your house — not pool within 10 feet of the foundation. If you have low spots collecting water against the slab, fill them with topsoil and re-grade the surface. For chronic pooling, a French drain or dry creek bed handles the overflow. This is a May project: fix it before the summer deluge season, not during it.

A quarterly exterior spray from a licensed pest control company creates a barrier that stops roaches, spiders, and ants before they enter. American cockroaches (Houston's infamous "waterbugs") enter through gaps in weatherstripping, weep holes, and utility penetrations. Seal those gaps first, then treat. Most pest control companies offer quarterly plans that are cheaper per visit than calling them reactively when you have an infestation.

Termite swarm season in Houston peaks March–May, but damage accumulates year-round. If you don't have an active termite bond, schedule an inspection now. Subterranean termites — by far the most common species in Harris County — enter through soil contact with wood and through mud tubes. An inspector checks foundation voids, garage door frames, fence posts, and wood mulch contact. Catching an infestation early means a $500 treatment vs. a $10,000 structural repair.

Eliminate standing water first: empty saucers under pots, bird baths every 2–3 days, clear clogged gutters, check for low spots in the yard. For active control, a monthly misting service treats vegetation where mosquitoes rest during the day. Harris County Mosquito Control (free service) also treats catch basins and reports. West Nile virus cases appear in Houston annually — this isn't just a comfort issue. Remove breeding habitat before Memorial Day weekend.

If you closed or reduced service over winter, a pool opening service tests and balances water chemistry, checks the pump, filter, and heater, inspects for cracks or equipment wear, and gets everything running before temperatures push 90°F. In Houston, this should happen in April — but May is still in time. Don't wait until June when pool companies are slammed and your water has already turned green. Balance pH (7.2–7.6), alkalinity (80–120 ppm), and chlorine (1–3 ppm) before swim season begins.

Houston's clay soil moves under pool decks as it expands and contracts. Cracks form and water gets underneath, accelerating the damage. Check the entire deck surface in May before the first heavy rains. Small cracks (<1/4 inch) can be filled with a concrete caulk or polyurethane sealant. Larger gaps or lifting sections need a professional assessment. Don't ignore cracks at the coping joint (where the deck meets the pool edge) — water infiltration there causes the most expensive damage.

Have a roofer inspect for missing or lifted shingles, worn flashing around chimneys and vents, and any soft spots indicating moisture damage. In Houston, the window between the spring hail season (March–May) and hurricane season (June 1) is exactly the right time to find and fix storm damage before a tropical system makes it catastrophic. Check that gutters are securely attached and that the fascia boards behind them aren't rotting. A $200 repair in May prevents a $15,000 storm claim in August.

Walk the outside of your house and check every place where something penetrates the wall: pipes, electrical conduit, AC lines, faucets, vents, and window/door frames. Re-caulk any gaps with an exterior-grade silicone caulk. This keeps insects, moisture, and conditioned air where they belong. In Houston, gaps in exterior caulk are the most common entry point for American cockroaches. A $10 tube of caulk prevents a $150 pest control call.

Tree branches touching or near your roof create two problems: they give squirrels and pests a highway onto your home, and in a storm they become projectiles or levers that pull off shingles. The rule: keep tree branches at least 6 feet from the roofline. Houston's tropical storms can push winds 40–70 mph even with a storm that doesn't make the news. Trimming also reduces leaf debris in gutters. Schedule before June 1 — after that, the heat makes outdoor work miserable and storm risk is active.

Test your generator, change the oil if it hasn't been run in 6+ months, and run it under load for 30 minutes. Check the transfer switch. Store fresh fuel with a stabilizer. If you don't have a generator and want one, buy and install in May or early June — standby generators sell out and installation wait times go to 6+ weeks when a storm approaches the Gulf. After Hurricane Beryl (2024) left much of Houston without power for over a week in July heat, generator ownership became a priority for most Houston homeowners.

Pull out your homeowners and flood insurance policies and verify coverage limits, your deductible (many Houston policies have a separate wind/hail deductible of 1–2% of home value), and whether you have actual cash value vs. replacement cost coverage. Walk through your home and record a video of every room and its contents — open closets, show electronics, furniture, appliances. Store the video in cloud storage. Claims without documentation pay out slower and for less. Do this now, not during a storm watch.