Phone answered 24/7 · Port St. Lucie, FL and nearby communities

Call 24/7: (772) 758-7923
St. Lucie River Dry-Out ProsWater Damage Help · Port St. Lucie, FL

How Do You Reduce Mold Risk When Closing a Vacation Home?

Last updated October 26, 2026

Call Now (772) 758-7923

The short answer

Start with a Thorough Drying

Before you lock the door, give every room a final once-over. Wipe down sinks, tubs, and counters with a dry cloth. Mop hard floors and let them air dry completely. Open closets and cabinet doors so air can move behind them. A damp rag left in a corner can become a mold patch within weeks.

Check the laundry area and any wet towels or rags. Wash and dry them fully before storing. Remove any houseplants that need frequent watering, or move them outdoors if the climate allows. The goal is to leave every surface as dry as possible. In a hot, humid climate, this step matters even more because of the year-round moisture in the air.

Shut off Water and Drain Lines

Turn off the main water valve to your vacation home. This prevents a slow leak from turning into a flood while you are away. Then open every faucet, including showers and outdoor spigots, to drain the remaining water from the pipes. Flush toilets once with the water off to empty the tanks and bowls.

After draining, pour a small amount of antifreeze or plumbing antifreeze into drains and toilet bowls if the home will be unoccupied during freezing temperatures. This stops residual water from freezing and cracking pipes. If you are unsure about antifreeze, check with a plumber for the right product. A dry pipe cannot burst and send water into your walls.

  • Turn off the main water valve.
  • Open all faucets to drain pipes.
  • Flush toilets to empty tanks.
  • Add antifreeze to drains if freezing is possible.
  • Write down the shutoff valve location for your records.

Control Indoor Humidity Levels

Set your thermostat to a temperature that keeps humidity low, usually around 80 degrees Fahrenheit in summer or 55 degrees in winter. Air conditioning removes moisture from the air, so running it on a timer can help. If you have a dehumidifier, place it in the most humid room, like a bathroom or utility area, and set it to drain into a floor drain.

If you cannot run a dehumidifier, consider leaving closet doors open and using moisture absorbers like silica gel or calcium chloride in small spaces. These products pull water from the air and need replacement every few months. Remember that a hot, humid climate with rainy summers means mold can grow fast. Keep humidity below 50 percent if possible.

Remove Fabrics and Food Sources

Fabrics like curtains, upholstery, and bedding trap moisture and provide food for mold. Wash and dry all linens before you leave, or store them in airtight plastic bins. Remove area rugs and roll them up, or vacuum them thoroughly and place them in a dry room. If you leave furniture, lift it off the floor with blocks to allow air circulation.

Clear out the refrigerator and pantry. Throw away perishable food, and leave the fridge door open after cleaning it to prevent mildew. Crumbs and spills attract pests that can chew through pipes and create leaks. A clean, empty home gives mold fewer surfaces to colonize. Store dry goods in sealed containers if you plan to return soon.

Plan for Regular Checks

Even with all precautions, mold can still appear. Arrange for someone you trust, like a neighbor or property manager, to walk through the home every couple of weeks. Ask them to check for musty smells, visible spots, or standing water. They can also look at the thermostat and dehumidifier to ensure they are working.

If you notice mold when you return, do not ignore it. Small patches can be cleaned with soap and water, but larger growth may require professional help. Local water damage pros can assess the situation and suggest the right cleanup steps. Acting quickly prevents mold from spreading deeper into walls and floors.

  • Ask a neighbor to check for musty smells.
  • Look for visible mold spots on walls and ceilings.
  • Verify the thermostat and dehumidifier are running.
  • Check under sinks and near windows for moisture.
  • Report any leaks or standing water right away.

Talk to someone now

Phones are answered 24/7 for Port St. Lucie and nearby communities.

Call Now (772) 758-7923

Frequently asked questions

Should I leave the heat on in my vacation home?

Yes, leaving the heat on at a low setting, around 55 degrees, helps prevent pipes from freezing in winter. In summer, use air conditioning to reduce humidity. Set the thermostat to a consistent temperature to keep moisture levels stable. Turning it off completely can lead to condensation and mold growth.

Can I just air out the house before closing?

Air circulation helps, but it is not enough on its own. You need to dry surfaces, remove moisture sources, and control humidity. Open windows for a few hours before you leave, but then close them and run a dehumidifier. Airflow alone cannot prevent mold if the air is humid.

What should I do if I find mold after being away?

First, protect yourself by wearing gloves and a mask. Small areas under three feet can be cleaned with a mild detergent and water. For larger patches, call a mold professional. They can identify the type and extent of growth and recommend safe removal. Do not paint over mold, as it will continue to spread underneath.

Call Now (772) 758-7923