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Mixed-humid Building America region · 1184 counties

August maintenance for a mixed-humid climate

Real winters and humid summers: the house switches between heating and cooling twice a year, and freezes are short but real.

5 tasks this month. The median typical first freeze across the region’s counties is Oct 30 and the last is Apr 6; your county can differ by weeks.

August5 tasks

  1. This month
    Press the test button on every smoke and CO alarm.

    An alarm you have not heard in months may have a dead battery or sensor. NFPA recommends testing smoke alarms at least once a month.

    How

    Hold the test button until it sounds. Anything silent or chirping: replace the battery, or the whole alarm if it is past its date.

    MonthlyEvery homeNFPA: Smoke alarms
  2. This month
    Look under every sink and around toilets and the water heater for drips.

    Slow leaks rot cabinets and subfloors long before they show. Catching one early is a washer, not a floor.

    How

    Use a flashlight: feel supply lines and the shutoff valves, look for stains, warped cabinet floors or a toilet that rocks.

    Every 3 monthsEvery home
  3. This month
    Keep indoor humidity below 60% (a cheap hygrometer tells you).

    EPA advises keeping indoor relative humidity below 60%, ideally 30 to 50%, to limit mold growth.

    How

    Run the AC or a dehumidifier in the basement or crawlspace; empty or drain the dehumidifier and clean its filter.

    SeasonalMixed-humid climate regionEPA: A brief guide to mold, moisture and your home
  4. Watch
    Vacuum the refrigerator condenser coils.

    Dusty coils make the compressor run longer and hotter, especially in summer.

    How

    Unplug the fridge, remove the bottom grille (or pull it out to reach rear coils) and vacuum with a brush attachment.

    YearlyEvery home
  5. Watch
    Seal cracks in the driveway, walkways and steps before the freeze-thaw season.

    Water in a crack freezes and widens it every winter.

    How

    Clean the crack and fill it with a concrete crack sealant on a dry day above 50°F.

    YearlyMixed-humid climate region

August in other regions