Whether your home is old or new, inland or oceanfront, few properties on Cape Cod or the Islands are immune to the effects of summer humidity. Rust forms on appliances, unprotected wood deteriorates quickly, and mold or mildew can become a problem. For vacation rental homeowners, the fight against moisture is more than just maintenance—it’s about preserving your investment and ensuring your guests are comfortable and healthy.
First Impressions Matter
A musty smell upon arrival can be a major turn-off for guests. Some may even suffer from mold allergies or respiratory sensitivities and be unable to stay in a home with poor air quality. That’s why it’s essential to take proactive steps to control dampness and prevent mold growth—not just for property upkeep, but for guest satisfaction and safety.
Smart Strategies to Minimize Moisture and Mold
❄️ Air Conditioning
While central AC can be costly and prone to overuse by guests, it’s an excellent way to cool and dry your home. Even a few well-placed window units can reduce interior humidity during a hot, sticky week.
💧 Dehumidifiers: A Must-Have for Some Coastal Homes
Dehumidifiers are one of the most effective tools for managing excess moisture, especially in basements and other trouble spots.
Tips for Use:
- Choose a model with automatic drainage to a sink or floor drain—ideal if you don’t want guests emptying reservoirs.
- Use a unit with a humidity setting (aim for 50% relative humidity).
- If guests use it, leave clear instructions in your welcome binder.
- If not, run it yourself during turnovers to keep moisture under control.
- Clean filters regularly and keep the unit dust-free.
🚫 Avoid Wall-to-Wall Carpeting
Especially in kitchens and bathrooms, wall-to-wall carpets trap moisture, stains, odors, and allergens. Stick with bare floors or washable rugs that are easy to clean and dry.
🚫 Say No to Wallpaper
Wallpaper tends to absorb moisture, which leads to mold—even if you can’t see it. Removing it can instantly improve air quality and reduce musty smells.
✂️ Trim Trees and Shrubs Away from the House
Dense vegetation holds moisture and creates shade, which slows the drying process. Keep growth trimmed to allow sunlight and air to circulate around your home.
🧽 Clean Surfaces Regularly
Focus on baseboards, windowsills, bathroom fixtures, and beneath sinks and toilets—any place where condensation can collect. Cold porcelain and pipes often “sweat,” creating the appearance of leaks.
🧴 Ammonia Over Bleach
To combat mold, ammonia is far more effective and safer than bleach. Bleach may lighten the stains but doesn’t kill the spores—and may even promote growth beneath the surface. Ammonia, on the other hand, neutralizes the mycotoxins and is your best bet for lasting results.
Other Common Moisture Challenges
🪵 Rot
Use a high-quality wood sealer (like Thompson’s WaterSeal) on decks, fences, and thresholds. For painted surfaces, keep up with repainting—chipping paint allows moisture to seep in. Frequent touch-ups are worth the effort.
🛠️ Rust
In coastal air, metal rusts quickly. Lightly oil tools, grills, and bikes to protect them. Stainless steel appliances hold up better in kitchens, but if rust forms and stains appear, CLR (Calcium, Lime & Rust remover) works well.
Summary
Proactive moisture control isn’t just good housekeeping—it’s key to protecting your rental income, your property, and your reputation as a responsible host.