French Drain Installation

What This Service Involves

We install perforated-pipe French drain systems in engineered gravel envelopes to capture and route groundwater and seepage away from foundations, athletic fields, roadways, and chronically saturated public grounds. Western Washington's high water table and prolonged wet season make subsurface drainage essential wherever standing water undermines structures or renders facilities unusable. Our crews set proper pipe slope, wrap drains in filter fabric to resist siltation, and daylight or connect outfalls in compliance with stormwater requirements. As-built locations and invert elevations are documented for your utility records.

Benefits

Intercepts groundwater before it damages structures or facilities; relieves chronic saturation on fields, grounds, and roadbeds; uses filter fabric to resist long-term siltation; connects to compliant, documented outfalls; delivers as-built records for the utility inventory

Our Process

1) Investigate the saturation source and design drain alignment and slope; 2) Trench and prepare the bedding to specified grade; 3) Place perforated pipe, gravel envelope, and filter fabric; 4) Establish the outfall, backfill, restore surface, and record as-builts

What Affects the Cost

Trench length, depth, and required pipe slope; soil type and dewatering during excavation; gravel, fabric, and pipe material volumes; outfall connection and permitting needs; surface restoration and traffic control scope

Best Time of Year

French drains are best installed in the drier summer window when the water table drops, easing excavation and allowing stable backfill before winter.