Basement Waterproofing Toronto
Interior & Exterior Solutions. Licensed Contractors. 10+ Years Experience.
Water in your basement is more than an inconvenience, it is a structural threat to your home and a risk to your health. Last King Construction offers complete basement waterproofing services across Toronto and the Greater Toronto Area. Whether you need interior drainage systems, exterior membrane waterproofing, sump pump installation, or foundation crack repair, our team delivers lasting solutions backed by real guarantees.
Every type of waterproofing, under one roof.
Interior Waterproofing Toronto
Drainage channels, weeping tile, and sump pump systems that redirect water away from your basement.
Get a QuoteExterior Waterproofing Toronto
Full excavation and membrane application to stop water before it enters your foundation.
Get a QuoteFoundation Crack Injection Toronto
Polyurethane and epoxy injection repair for hairline and structural cracks.
Get a QuoteSump Pump Installation Toronto
Submersible and pedestal sump pumps with backup battery systems.
Get a QuoteHow we waterproof your Toronto basement.
Free On-Site Assessment
Customized Waterproofing Plan
Permits Pulled (if required)
Professional Installation
Final Inspection & Cleanup
Warranty Issued
Waterproofing FAQ.
Toronto's freeze-thaw climate puts extreme pressure on foundations. Water expands as it freezes inside foundation cracks, then thaws and seeps in. Combined with our clay-heavy soil and aging housing stock, untreated foundations almost always leak eventually. Proper waterproofing protects structural integrity, prevents mold, and preserves resale value.
Basement waterproofing across the GTA.
Real homeowners. Real basements.
"Exterior waterproofing on a 1950s bungalow. Last King handled the permit, the dig, and the membrane application. Three years and two floods on our street later, our basement is still completely dry."
Daniel R.
East York
"We had recurring leaks at the cold cellar. Their team scoped it, installed an interior system with a battery backup sump, and walked us through the warranty. Total professionals."
Aisha K.
Etobicoke
Waterproofing projects across the GTA.
