August Home Maintenance Checklist: Beat the Fall Booking Rush

August's checklist has two jobs: notice what a summer of heat has done to your house, and get on the calendars of the pros everyone else will call in September. Book chimney and heating service now, test the sump pump and its backup battery before storm season peaks, review trees and shrubs, and take one slow lap around the exterior to catch changes before fall weather. The phone calls are easier to make before seasonal service calendars fill.

The summer maintenance guide has the season-long view; below is just August, plus the first pieces of fall prep that reward starting early.

Make the fall service calls now

Every chimney sweep and heating contractor has the same busy season: the six weeks after the first cold night, when everyone remembers their furnace at once. In August, you're calling into an open calendar. In October, you're taking whatever slot is left.

Arrange the annual chimney inspection before regular use. Use a qualified chimney professional. Cleaning or repair depends on the fuel, deposits, use, damage, appliance, and installed system rather than an automatic annual sweep. Ask the inspector to document the recommended scope and provide a local quote.

Schedule gas-fireplace service. CPSC recommends a yearly professional inspection of fuel-burning fireplaces and their venting. Ask the technician to follow the installed model's service instructions, and get a local quote for that scope.

If you have a fuel-burning boiler, schedule its annual service. The CDC recommends annual service by a qualified technician for fuel-burning heating systems. The technician should follow the installed model's combustion, heat-exchanger, venting, control, and cleaning procedures. Book before regular heating use; colder regions usually reach that deadline first.

If you have a radiant system, review its fluid requirements. Fluid type, concentration, pressure, pH, and service interval depend on the boiler, tubing, manifold, and fluid documentation. Ask a qualified heating professional to test the installed system and replace fluid only when those results and instructions call for it.

Furnace and heat pump owners aren't off the hook; the tune-up belongs in early fall, and the smart move is booking now for a September or October date. The full year of timing is in our HVAC maintenance schedule.

Test the sump pump before storm season peaks

Late August through September is when the sump pump earns its keep: hurricane remnants in the East and Southeast, the first serious fall rains elsewhere. Test it now, on a dry day.

Use the installed pump or controller manual's test method. Some systems permit adding enough water to reach the normal activation level; others provide a test control. From a dry position, verify that the pump starts, lowers the water, stops, and discharges normally. Keep hands and tools out of a powered pit. Disconnect every power source before reaching into the basin, and call a plumber or pump technician if the test fails.

Then use the backup controller's labeled self-test and review its battery, charger, pump, float, power, and alarm status. Battery chemistry, ventilation, maintenance, and replacement age vary by system, so follow the exact controller and battery instructions rather than a universal three-year rule. While you're there, our plumbing maintenance checklist covers the rest of the basement.

Walk the house and look for heat damage

By late August, your house has taken two-plus months of UV, thermal expansion, and thunderstorms. One slow lap around the exterior tells you what that cost, and the fixes (caulking, touch-up paint, minor roof work) want the mild, dry weather of early fall, so look now.

• Caulk and sealant. South- and west-facing joints take the most sun. Check window and door perimeters and anywhere siding meets trim: cracked, chalky, or pulling-away caulk goes on the September list, before fall rain finds the gaps.
• The roof, from the ground. Binoculars are enough. Look for cupped, cracked, or missing shingles after summer storms, and check under the gutters for piles of granules. Roofers book up fast once fall rains start, so chase anything suspicious now. Our roof maintenance guide covers what each symptom means.
• Trees and limbs. From the ground, look for dead, broken, hanging, rubbing, or newly overhanging branches near the roof, driveway, access routes, or utilities. Species, condition, purpose, and local disease guidance determine whether and when to prune. Do not climb, use a ladder or chainsaw, cut above shoulder height, or work within 10 feet of an overhead line. Contact the utility for conductor conflicts and use a qualified arborist for large, elevated, damaged, or uncertain work.
• The AC, by ear. It's been running hard since June. Warm air, ice on the refrigerant line, or short cycling means a service call now, not a note for spring.

Review shrubs before fall

Look for dead, broken, diseased, rubbing, or obstructive growth and plants blocking a door, walkway, sight line, utility meter, vent, or outdoor equipment service area. Pruning timing and technique depend on the species, how it flowers, plant condition, and local pest, disease, and freeze guidance. The University of Minnesota Extension pruning guide explains why flowering time and plant type matter. Follow the equipment manual for required plant clearance, and use a qualified arborist or utility when work is large, elevated, or near conductors.

Keep the pest sweeps going

Keep the weekly standing-water check going while mosquitoes are active: empty accessible containers, change water in bird baths and similar features, and recheck after rain. Review the areas people and pets use for tall grass, leaf litter, brushy borders, shade, overwatering, wildlife food, and flea or tick evidence. Coordinate pet flea prevention with a veterinarian, and use a yard pesticide only when the label lists the identified pest, site, timing, and application method.

In fire country, this is the critical month

Late summer is the heart of fire season across the hot-dry West, and two tasks are top priority there:

1. Review and maintain defensible space. Compare the property with current guidance from the local fire authority, community wildfire plan, insurer, and applicable code. From the ground, remove reachable loose leaves, needles, dead vegetation, and other debris from the areas and surfaces those sources identify. Plant spacing, mulch, fences, decks, slopes, utilities, and neighboring fuels need item-specific decisions rather than one national distance rule. The U.S. Fire Administration explains how healthy landscaping, maintenance, and local conditions work together. Use qualified help for ladders, roofs, chainsaws, large trees, utilities, or fuel handling.
2. Arrange roof and gutter debris clearing. Pine needles and leaves in valleys, behind the chimney, and in gutters can provide fuel for embers. Inspect from the ground and use qualified roofing or gutter service for roof-edge access. This is a fire task, separate from ordinary drainage-season service.

Common questions

Is August really the right time to book furnace service?

Booking, yes; the visit itself can land in September or early October. An August call gets a convenient early slot; an October call gets a two-week wait during the first cold snap. In zones 5–7, where heating season arrives early, book at the start of the month.

My gas fireplace gets little use. Does it still need service?

Yes. CPSC recommends yearly professional inspection of fuel-burning fireplaces and their venting. The service scope depends on the installed model, so the technician should use that appliance's manual rather than a generic chimney checklist.

How do I know if my sump pump battery is dead?

Check the controller for a low-battery, charger, pump, float, or power alert and run the labeled self-test. Inspect the battery enclosure and accessible terminals for swelling, leakage, heat, damage, or corrosion without shorting the terminals. Use the installed instructions for the battery type and replacement interval; call for service when the test fails or the wiring and battery condition are uncertain.

Can I prune shrubs in late August in a cold climate?

It depends on the species, plant condition, purpose of the cut, local freeze timing, and local pest or disease guidance. Identify the plant and use current local extension guidance. Dead, damaged, diseased, and shaping cuts may have different timing, so a single national cutoff is not reliable.

Which of these apply depends on the house: no basement means no sump pump, no fireplace means no sweep, and zone 2A has no pruning deadline. SeasonKeep keeps track of which is which for your address and sends reminders at booking time rather than breakdown time; the free plan is enough to try it. When you're ready to look ahead, the September checklist is where fall prep begins in earnest.