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Waterproofing & Foundation Repair in Toronto & the GTA

Keep your home dry and structurally sound with Valencia LCD’s professional Basement Waterproofing Toronto and Foundation Repair GTA services. Whether you’re combating water seepage, foundation settlement or hydrostatic pressure, our certified experts diagnose the problem and deliver long-term solutions—before mold, rot or structural damage take hold.
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Our Waterproofing & Foundation Services

Basement Waterproofing

  • Interior Waterproofing Toronto: Install interior perimeter drainage channels (French drains), sump pump systems and moisture-loc drainage board to redirect groundwater away from your basement.
  • Exterior Waterproofing GTA: Excavate around the foundation, repair cracks, apply bentonite or rubberized asphalt membranes, and backfill with drainage stone for complete defense against moisture.
  • Crack Injection & Sealing Toronto: Pinpoint cracks and voids in foundation walls—inject high-pressure polyurethane resin or epoxy to seal gaps and restore structural integrity.
  • Crawl Space Encapsulation: Vapor barrier installation with dehumidifiers to eliminate musty odors, mold and insect intrusion.

Foundation Repair

  • Foundation Crack Repair GTA: Identify hairline cracks vs. structural cracks—use epoxy injection for non-structural leaks or carbon fiber/steel reinforcement for structural stabilization.
  • Underpinning & Soil Stabilization Toronto: Install helical piles or concrete underpinning beams to support settling foundations and prevent further subsidence.
  • Wall Plate Installation GTA: Apply steel or carbon fiber plates to bowed or bulging walls, combined with bracing to straighten and stabilize.
  • Concrete Lifting & Mudjacking: Raise sunken concrete porch steps, sidewalks or slab-on-grade foundations back to level using PU foam or cementitious slurry.

Why Choose Valencia LCD

Certified Waterproofing Specialists

Our technicians are trained and certified in basement waterproofing techniques—interior drainage, exterior membranes and sump pump installation—ensuring a dry, healthy basement.

Comprehensive Structural Expertise

From crack injections to wall bracing and underpinning, our team includes structural engineers who design long-term foundation repair solutions for GTA soil conditions.

Transparent, Itemized Quotes

We provide clear estimates for “Basement Waterproofing Toronto,” “Foundation Crack Repair GTA,” “Underpinning Toronto” that cover labor, materials and permit fees.

Lifetime Warranty Options

Depending on the system installed, we offer up to a lifetime warranty on certain waterproofing membranes and 2-year craftsmanship warranties on labor.

Our Process

Our Process 

1. Free Home Inspection & Moisture Testing

• Schedule a no-charge assessment. We use moisture meters and camera scopes to detect leaks behind drywall or under slabs.

• Provide a detailed report, including elevation levels, groundwater flow patterns and structural movement data.

2. Design & Permit Acquisition

•Develop a customized waterproofing/foundation repair plan—interior vs. exterior approach, proper drainage specifications, sump pump sizing.

• Valencia LCD handles all necessary permits: Toronto Building Division, Peel Region permits for Mississauga/Brampton, etc.

3. Site Preparation & Excavation

• For exterior waterproofing: excavate foundation perimeter, install drainage tile and proper subgrade stone.

• For interior waterproofing: remove drywall/flooring along perimeter, cut channels in floor slab, and install drainage pipe.

4. Waterproofing System Installation

• Interior: Cover perimeter trench with gravel, install drain tile and connect to discharge pipe or sump pit.

• Exterior: Repair cracks, apply waterproof membrane (bentonite or rubberized asphalt) to foundation walls, backfill with aggregate and proper grading.

• Install high-efficiency sump pump and battery backup for peace of mind during power outages.

5. Foundation Repair & Reinforcement

• Perform crack injection (polyurethane for leaks, epoxy for structural bonding).

• Apply carbon fiber or steel reinforcement to bowed walls, anchor plates, and cross braces as needed.

• Implement underpinning with helical piles or concrete piers for sunken foundations.

6. Final Inspection & Cleanup

• Confirm waterproofing integrity with flood tests (interior pits) or moisture sensors.

• Backfill excavation area (if exterior) and re-grade soil to direct runoff away from foundation.

• Replace interior finishes: patch drywall, re-lay flooring, install new baseboards as required.

Frequently Asked Questions

How do I know if my basement needs waterproofing?

Signs include cracks in foundation walls, damp spots on walls or floors, musty odors, efflorescence (white salt deposits), or visible water pooling after rain. A free inspection can confirm the best approach.

Which is better: interior or exterior waterproofing?
  • Interior systems (French drain + sump pump) are cost-effective and non- invasive to landscaping but manage only water that enters your basement.
  • Exterior systems (membrane + excavation) stop water before it enters but involve more excavation and higher cost. We assess soil conditions and budget to recommend the right solution.
How long does a foundation crack repair take?

Minor crack injections often take 1–2 days. Structural underpinning or wall bracing can take 3–5 days depending on complexity and site conditions.

Will waterproofing ruin my landscaping?
Exterior waterproofing requires excavation around the foundation, which disturbs existing plants or sod. Valencia LCD will re-grade and re-sod your lawn and restore garden beds as part of final cleanup.

READY TO TRANSFORM YOUR PROPERTY?

Whether you need a new deck, foundation repair, a retaining wall or a full renovation anywhere in Toronto or the GTA, Valencia LCD offers complete solutions at top quality.
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+1 (437) 733-0505