Did you know that a wet or damp basement doesn’t just stay in the basement? Excess moisture rises through your home. Frequently an old leaky home with a wet basement can have moisture condensation that results in that moisture showing up in the attic, with mold on the roof deck due to poor attic air sealing and attic ventilation. If you have signs of attic mold, the moisture very well could have come from a wet basement!
A damp basement also creates the perfect environment for mold and mildew to thrive, and once established, mold releases spores that can infiltrate your entire home, impacting indoor air quality and your family’s health. Additionally, moisture and mold can deteriorate building materials like wood, drywall, and insulation.


Increased humidity levels also creates the perfect environment for dust mites to thrive in your home – in your carpets, bedding, and furniture, where they feed on skin cells.
By controlling moisture at the source with proper basement waterproofing, you’re not just protecting your home from water damage – you’re also creating a healthier living environment upstairs by reducing dust mite populations and improving overall air quality. It’s one of the hidden health benefits of keeping your basement dry and your home breathing easier.
Why Mold Grows – and How to Prevent It
Mold thrives in environments where humidity levels are above 50%. And a moisture-ridden basement or crawlspace is exactly the kind of dark, damp place they need.
What causes excess basement humidity?
- Humid Maine summers
- Ponding water in your basement floor from rain
- Plumbing leaks (common and often unnoticed in old Maine basements)
Left unchecked, this leads to:
- Mold and mildew
- Rot and rust
- Poor indoor air quality
- Damage to storage, furniture, and HVAC systems
Wet Maine basements and crawlspaces can introduce additional respiratory hazards and allergens that can exacerbate allergies and asthma. You don’t want to worry about what’s growing behind your walls or under your feet and whether the air in your home is safe for your family to breathe
That’s why Evergreen starts every basement consult by understanding the full moisture picture, so we can recommend the right steps in the right order.


Evergreen’s Comprehensive Approach to Mold Prevention
Evergreen doesn’t provide mold remediation or cleanup services. If your basement already has significant visible mold, we’ll refer you to a trusted professional for safe removal before we solve the causes of the excess moisture that led to your current issues.
Our team is focused on solving the root causes of home moisture and mold problems. Depending on the specifics of your home, we have integrated basement waterproofing solutions and crawlspace encapsulation services which can include:
- Interior French drain systems that redirect water out of your basement or crawlspace
- Sump pump installation with battery backups that ensure continuous operation during power outages
- Vapor barriers that seal out ground moisture while also controlling soil gases like radon
- Dehumidifiers that help maintain optimal humidity levels (Every Maine basement needs a dehumidifier!)
Together, these upgrades create a basement or crawlspace where mold and mildew can’t take hold.
Protect Your Home – and Everyone Who Lives in It
Mold exposure can lead to respiratory issues, allergies, and other health concerns. But with Evergreen’s help, you can:
- Lower your risk of mold growth
- Improve the quality of the air your family breathes
- Preserve the value of your home for the long haul


Serving Portland, Rockland, and Homes Across Coastal Maine
Evergreen is a member of the Maine Indoor Air Quality Council and we’ve helped thousands of homeowners across Southern and Coastal Maine keep mold at bay with smart basement waterproofing.
“I work in the mold remediation industry and am happy to recommend [Evergreen] for corrective measures to ensure the mold does not return.”
—Matthew Richardson
Whether you’ve already seen signs of moisture or just want peace of mind before finishing your basement, we’re here to help!