Drainage and French Drains in Portland, Maine

Precision Earthwork to Move Water Off Your Property

Most basement and yard flooding in Portland comes from one of three failures: original perimeter drains that have collapsed or silted shut after 50 years of service, surface grading that pitches water toward the foundation instead of away from it, or downstream drainage tie-ins that no longer carry the volume they were sized for. Interior sealants and crack injections don't fix any of these. They mask the symptom while the water keeps pressing on the foundation. The fix is exterior: re-grading, perimeter drain, exterior waterproofing membrane, daylight outlet to a proper discharge point.

Why Portland Drainage Problems Need a Different Approach

Portland's housing stock is older than most of Southern Maine's, and that age is at the root of most drainage problems we see. Triple-deckers and 1900-era single-families in Munjoy Hill, the West End, and Deering were often built with rubble foundations and no exterior waterproofing. The original drains, where they exist at all, are clay tile that collapsed decades ago. Density compounds the problem: water runoff from neighboring properties has nowhere to go except through your lot, and the city's storm system has limited capacity in the older neighborhoods. Frost-thaw pressure: Maine's freeze-thaw cycle puts hydrostatic pressure on basement walls every winter, and walls without functional perimeter drains crack and seep over time.

We've worked enough Portland drainage jobs to know which neighborhoods have known stormwater issues, where the city storm tie-ins make sense, and how to stage exterior excavation work on lots where there's no room to stage anything.

Backed by Envy Construction Foundation Experience

Eric Storey, VP of Excavation, has been installing perimeter drains and exterior waterproofing on new Envy Construction foundations for years. The same standard goes onto a 100-year-old Portland house.