Under-slab drains installation

A new home foundation is only as reliable as the drainage system beneath it. GTAConcreteworks provides residential under-slab drainage installation designed to control groundwater and moisture before it becomes a costly problem. By managing hydrostatic pressure and water movement under and around the slab, an effective under-slab drainage system helps protect your foundation from long-term deterioration, interior dampness, and preventable repairs.

This work is most critical before the concrete is poured - because once the slab is down, fixing drainage issues becomes expensive, disruptive, and often incomplete.

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What Under-Slab Drainage Does (and Why It Matters)

Water naturally seeks the path of least resistance. Without proper drainage, moisture can accumulate under a slab and around foundation walls, increasing pressure on the foundation and driving dampness into the building envelope. A properly designed under-slab drainage system helps:

• Relieve hydrostatic pressure beneath the slab and at the foundation perimeter

• Reduce moisture buildup that can lead to damp odors and indoor humidity issues

• Lower the risk of foundation movement or cracking caused by water pressure and saturated soils

• Prevent mold-friendly conditions by keeping the sub-slab area drier

• Protect finished basements and interior flooring systems from moisture-related damage

 

Our Approach: Designed for Your Site Conditions

There’s no one-size-fits-all drainage layout. Soil type, grading, lot drainage, and foundation design all affect what will work. Our team designs and installs systems that are built for real conditions on site, with an emphasis on:

• proper placement and slope for consistent water movement

• clean, stable installation before backfill and pour

• integration with the overall foundation drainage approach (so the system works as one)

• workmanship that supports long-term reliability—not quick fixes

 

Ideal for New Builds (and Smart for Renovations)

Under-slab drainage is a high-impact investment for:

• new home builds (best time to do it right)

• basement underpinning or major foundation work

• homes in areas with higher water tables or moisture-prone soils

• homeowners planning a finished basement who want fewer moisture surprises later

 

Peace of Mind and Long-Term Protection

Foundation moisture issues can lead to structural concerns, indoor air quality problems, and repeated repair costs. Our goal is simple: build the drainage right the first time so your home stays protected for the long haul.

If you’re planning a new residential foundation or slab, contact GTAConcreteworks for professional under-slab drainage installation in Toronto and the GTA - for lasting protection, healthier interiors, and confidence in your build.