Memorial Day Weekend: Opening Your Summer Home Without Mold Surprises

Memorial Day weekend marks the unofficial start of summer—and for millions of Americans, it's time to open the lake house, beach cottage, or mountain cabin that's been closed all winter. But before you settle into vacation mode, there's work to do. Homes that sit empty for months are prime candidates for mold growth.

Whether your property has been closed since fall or you're preparing a rental you've just booked, this guide will help you ensure your summer starts fresh—not musty.

Before You Arrive

Contact Local Contacts

• ✓Check with caretaker or neighbor who may have noticed issues
• ✓Verify no utility problems occurred over winter
• ✓Confirm power and water are on (schedule turn-on if needed)

Pack Inspection Supplies

• Flashlight
• Hygrometer
• Phone/camera for documentation
• Cleaning supplies (vinegar, spray bottles, gloves)
• N-95 mask in case you find mold

Arrival Protocol

Exterior Check First

Before entering, walk the perimeter:

• ✓Look for obvious damage—fallen trees, roof damage, broken windows
• ✓Check for signs of water intrusion (staining on siding)
• ✓Note any standing water near foundation
• ✓Inspect roof from ground level

Open Up Safely

When first entering:

• ✓Open all windows and doors immediately—ventilate before doing anything else
• ✓Turn on HVAC to circulate air (if system is on)
• ✓Take a moment to sniff—musty odors are your first warning
• ✓Do NOT run HVAC if you smell mold—it could spread spores

Systematic Inspection

Kitchen

• ✓Check under sink for leaks or moisture
• ✓Open refrigerator—should have been cleaned and propped open
• ✓Run water in all fixtures; check for proper drainage
• ✓Look for pest intrusion (droppings, nests)
• ✓Check dishwasher interior for mold

Bathrooms

• ✓Inspect toilet—flush to ensure function
• ✓Check caulk around tub/shower
• ✓Look for mold in grout and on ceilings
• ✓Run exhaust fans to verify operation
• ✓Check under sinks

Bedrooms

Check each bedroom:

• ✓Open closet doors and check for musty smell or visible mold
• ✓Look behind any furniture left in place
• ✓Check window sills for moisture damage
• ✓Strip beds and inspect mattresses

Living Areas

• ✓Look for water stains on ceilings
• ✓Check behind any stored furniture
• ✓Inspect window sills
• ✓Check fireplaces for water intrusion

Basement/Crawlspace

Basement property has one, these areas are critical:

• ✓Check for standing water
• ✓Look for efflorescence (white mineral deposits)
• ✓Inspect stored items for moisture damage
• ✓Test sump pump operation
• ✓Check humidity level—likely elevated

Attic

If accessible:

• ✓Look for roof leak evidence
• ✓Check for pest intrusion
• ✓Inspect for any moisture or mold on sheathing

Water System Start-Up

If water was turned off:

• ✓Turn on main water slowly
• ✓Check all visible pipes for leaks
• ✓Run each faucet until water runs clear
• ✓Flush toilets
• ✓Check water heater—look for leaks or corrosion
• ✓Run dishwasher and washing machine empty cycles

Humidity Management

After months of closure, humidity is likely elevated:

• ✓Take humidity readings in multiple rooms
• ✓Run AC or dehumidifiers aggressively first 24-48 hours
• ✓Keep windows closed once initial airing is complete
• ✓Monitor until humidity drops below 50%

If You Find Problems

Small Mold Growth

If you find small areas of mold (under 10 sq ft):

• ✓Document with photos
• ✓Clean with white vinegar or appropriate cleaner
• ✓Ensure area is thoroughly dried
• ✓Identify moisture source and address
• ✓Monitor for recurrence

Significant Mold or Water Damage

For larger issues:

• ✓Document thoroughly
• ✓Don't disturb—can spread spores
• ✓Contact property insurance
• ✓Hire professional remediation
• ✓Consider alternative accommodation for the weekend

Setting Up for Summer

Once inspection is complete and any issues addressed:

• Set thermostat to maintain comfortable, dehumidified conditions
• Program dehumidifiers if applicable
• Make list of any needed repairs
• Stock cleaning supplies for the season
• Set up routine maintenance schedule

For Renters

If you're renting a vacation property and find mold:

• ✓Document immediately
• ✓Contact property owner/manager right away
• ✓Request different accommodation if problem is significant
• ✓Know your state's renter rights regarding mold

Enjoy Your Summer

A thorough inspection on opening weekend sets the tone for the entire summer season. Take the time to do it right, address any issues promptly, and you'll enjoy worry-free weekends all summer long.

If problems exceed your DIY capabilities, our Find a Pro directory can connect you with qualified professionals who can help get your summer property back in shape.