Commercial Waterproofing in Toronto & Southern Ontario

Protect Your Commercial Building With Aquamaster

Water has a way of finding the weakest points in your building. Whether it slips through foundation cracks, pools around elevator shafts, or seeps through underground garage walls, the damage adds up fast.

Aquamaster handle commercial waterproofing for everything from mid-rise offices and schools to high-traffic retail plazas and deep foundation parking structures. With 24/7 availability and a 25-year warranty, you can trust that our work lasts and your property stays protected.

Award-Winning Waterproofing Contractor

Commercial Waterproofing and Caulking Services in Toronto

At Aquamaster Plumbing, we provide a full range of commercial waterproofing services designed to meet the needs of buildings both new and existing. Our team has experience with a wide variety of commercial properties, including shopping centers, apartment buildings, warehouses, schools, hospitals, and other institutional spaces.

ICF waterproofing: We often work with partners like custom home builders to waterproof properties that are still under construction with insulated concrete foam (ICF).
Blindside waterproofing: Widely known as pre-applied basement waterproofing, blindside waterproofing is an excellent choice for commercial properties in the initial stages of construction with scenarios like zero-lot-line foundations that complicate their construction.
Crack repair: Our experts can perform foundation crack repairs for damaged sections of walls and floors. We can help evaluate the extent of foundation damage and recommend an appropriate solution – from sealing foundation cracks with epoxy injection to solutions like crack stitching.
Other commercial waterproofing services: From drainage system maintenance and catch basin cleaning to sump pump installation and commercial plumbing, Aquamaster provides our clients with a full suite of services.

You can always expect top-quality service from Aquamaster’s commercial waterproofing contractors. Let’s discuss the next project for your commercial building!

5-Star Reviews from 100+ Happy Customers

Aquamaster has earned over 100 x 5-star customer reviews from happy customers! Take a look at what our past and present clients have to say to learn more about Aquamaster experience.

Aquamaster Basement Waterproofing Toronto

4.9

Based on 274 reviews

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Peter completed the exterior waterproofing about six months ago and we’ve had several heavy rains since then. The basement has stayed 100% dry. His work clearly lasts. Truly impressed.

Valar Gorgis

03:06 24 Dec 25

Amazing work from John and Peter. Had basement waterproofing done and the results were great. The team was professional, explained the process clearly, and finished on time. No more water issues. Highly recommend.

Annan Abu Salha

19:22 22 Dec 25

We chose Mike for exterior basement waterproofing and it was worth every dollar. The crew was on time, respectful, and did a thorough job sealing and protecting the foundation. Amazing value for the quality.

Gabriel Martinelli

16:29 22 Dec 25

I can’t thank Aquamaster enough for their outstanding service. They fixed multiple cracks in my foundation, waterproofed the interior walls, and installed systems to keep groundwater away from the house. The workers were skilled, considerate, and left the entire area neat and tidy. Since the repairs, the basement is dry, safe, and ready to use again — no more worries about mold or structural damage. Superb workmanship and customer care.

zlata

04:31 16 Dec 25

John was honest, reliable, and very skilled. He took care of the interior basement waterproofing and even showed us photos during the process. The results were perfect and the basement smells much fresher now. Fantastic technician!

Alex

00:58 16 Dec 25

Mike handled our interior basement waterproofing and was incredibly detailed. He showed us the problem areas, installed the drainage system perfectly, and made sure everything looked clean and professional. Zero water issues since. Excellent service!

Shafeeq Shafeeq

20:08 15 Dec 25

Mike and Peter did the exterior basement waterproofing on our home. Not only was the workmanship excellent, but the cleanup was spotless. You can tell they really care about their work. Highly recommend this company!

Omar Baqer

19:58 15 Dec 25

John performed our interior basement waterproofing and installed a new sump pump system. He arrived on time, worked quickly, and left everything clean. The difference is amazing—our basement feels dry and safe now. Very impressed with his workmanship.

Mustafa abed-ali

19:49 15 Dec 25

1. Aquamaster did an incredible job waterproofing my basement. The crew arrived exactly when they said they would, took the time to walk me through each step of the process, and worked with impressive focus and efficiency. After the heavy rain last week, water that used to seep in every storm didn’t even make it to the threshold — the basement stayed completely dry for the first time in years. They left the work area spotless and followed up to make sure everything was performing as promised. I’m beyond happy with the results and would recommend Aquamaster to anyone who’s had ongoing moisture issues.

Romina

01:46 26 Nov 25

We had a leak in the corner of the basement after a storm, so we called Aquamaster. Alex and Julia came out the same week. They sealed the crack, dug outside to improve drainage, and checked the grading around the house. They even gave us maintenance tips so we wouldn’t face the same issue again. Amazing service and very polite team.

Галина Пустовіт

02:18 21 Nov 25

We contacted Aquamaster after discovering moisture behind our storage shelves. Daniel and Mark handled the repair. They were extremely professional — walked us through the entire waterproofing process, pointed out issues we never noticed, and explained how the foundation was shifting over time. They fixed the crack, sealed the base of the wall, added waterproof coating, and cleaned everything before leaving. The basement smells fresh now instead of damp.

_ МАКСИМ_

05:01 20 Nov 25

Thomas and Leo were incredibly efficient. They worked nonstop until the job was done and kept us updated the whole time. The basement has stayed completely dry since their visit.

Tokyo Ghost

01:58 19 Nov 25

Maria and Alex made everything so easy. Maria was very responsive and patient with our questions, and Alex’s team handled the work efficiently. They waterproofed the basement and fixed a leaking window well. Everything was done perfectly and on schedule. It’s such a relief knowing our basement is protected.

кіра

05:41 16 Nov 25

We couldn’t be happier with Aquamaster Waterproofing. David and Mike handled the entire project from inspection to final cleanup. They repaired our cracked foundation, sealed the basement walls, and added proper drainage. The work was neat, efficient, and done ahead of schedule. The peace of mind they’ve given us is priceless.

Liza 14

02:45 10 Nov 25

We had a major basement flooding issue, and no one could figure it out—until we called Aquamaster Waterproofing. Sarah and David were thorough during the inspection and found that our sump pump had failed. They replaced it, installed a backup pump, and added better drainage around the foundation. The system works flawlessly now, and our basement has been dry ever since. Five-star service from a truly reliable company.

Mercury

02:16 10 Nov 25

We recently moved into an older home and discovered water coming through the floor in the basement. Aquamaster’s team, led by Alex and David, came right away for an inspection. They installed a sump pump, sealed all visible cracks, and made sure our drainage system was working correctly. The workers were polite, neat, and extremely knowledgeable. It’s rare to find a company that combines great service with such high-quality workmanship. I’m beyond satisfied with the results.

Bogdan Perekatov

04:37 08 Nov 25

David and John from Aquamaster did an excellent job fixing our wet basement. They explained the problem clearly and provided a permanent solution. The quality of their work is unbeatable.

Тарас Назарко

04:50 06 Nov 25

Maria at the front office was so kind and helpful, and Daniel’s crew did flawless work sealing our foundation cracks. We can finally enjoy our basement again. Five-star company through and through.

Usman Mohammad

04:56 04 Nov 25

The crew from Aquamaster did an incredible job. They were very detail-oriented and made sure everything was done properly. I was impressed by their professionalism and care. My basement is completely dry now.

Ильченко Валерия

01:48 29 Sep 25

Aquamaster completely fixed my leaky basement. The crew—Mike and Peter—were fantastic. They worked quickly, cleaned up after themselves, and made sure everything was perfect. I highly recommend this company.

A Zhoravovych

03:54 28 Sep 25

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Types of Commercial Waterproofing Systems We Install in Toronto

We offer a variety of commercial waterproofing systems depending on the application and property type.

These include:

Exterior waterproofing with rubberized membranes
Interior drainage systems with sump pumps
Crack injection with epoxy or polyurethane
Blind-side or ICF waterproofing
Crystalline waterproofing for concrete structures
Liquid-applied membrane systems for interior or vertical walls

Our most trusted materials include Aqua-Bloc 770-06 liquid membrane and 4×100 corrugated drain pipe with filter wrap. We do not use anything on your site that we would not use on our own.

Materials We Use

We use only proven commercial waterproofing products and drainage materials on every job.

Some of our most trusted tools and materials include:

Aqua-Bloc 770-06: a high-performance liquid membrane ideal for foundation walls
4×100 Corrugated Drain Pipe with Filter: for long-lasting underground drainage
Delta MS and DMX Air Gap Membranes
Bakor Yellow Jacket Mesh and hydraulic cement

We always choose the right waterproofing products based on site conditions and client needs.

Waterproofing for New Builds and Blind-Side Jobs

New construction brings its own set of waterproofing demands. For ICF foundations, deep urban excavations, or sites with minimal access, we use blind-side waterproofing systems that get placed before backfill. We coordinate directly with your engineers, architects, and general contractors to make sure everything fits into your build schedule.

Specialty Work and Structural Support

Some of the most flood-prone areas in a building are below grade and out of sight. This includes elevator pits, tunnels, and mechanical rooms. We waterproof these spots and, if needed, we also perform floor lowering and underpinning to increase ceiling height while keeping the foundation strong.

Every job starts with a free site visit. We inspect the property, highlight high-risk zones, and lay out a clear step-by-step plan. Permit applications, safety planning, and municipal code compliance are all handled by us so you can focus on keeping your building running.

How We Handle Commercial Waterproofing Jobs

Waterproofing at scale requires more than sealing a few joints. It is about doing the work without halting your operations or compromising safety.

Minimizing Disruption – We plan our schedules around your hours. We know businesses cannot afford shutdowns, so we build work plans that keep you open while we handle the job.
Permit Handling- From lane closures to curb cut approvals, we sort through city paperwork and get permits processed before crews arrive on-site.
Safety Measures – We put up protective hoarding, mark out work areas clearly, and maintain job sites that stay clean and safe for staff, tenants, and the public.
Vacuum Excavation – Digging around underground utilities requires precision.
We use vacuum – trucks to expose lines safely and move faster without risking costly damage.
Surface Restoration – Once the waterproofing is done, we repair every surface to match its original state. Whether it is interlock pavers or poured concrete, we leave it clean and professional.

Why Choose Aquamaster for Commercial Waterproofing in Toronto?

With over 15+ years of industry experience, Aquamaster has become one of the most trusted commercial waterproofing companies in the Toronto area. Our licensed team of commercial waterproofers delivers reliable, clean, and efficient work on every project.

25-Year Warranty Coverage

We offer a 25-year transferable warranty on labor, materials, and workmanship for all commercial waterproofing projects.

Emergency Services

Our crew is on call 24/7 to respond quickly to emergency waterproofing or drainage issues anywhere in the GTA.

Licensed and Insured

All work is performed by licensed, insured professionals trained in waterproofing, plumbing, underpinning, and structural repairs.

Excellent Price

First-time customers receive 10% off their initial service—quality waterproofing at competitive, transparent pricing.

SIndustry Expertise

In business since 2009, we bring over a decade of hands-on experience to every commercial waterproofing job.

Proudly Serving South Ontario

We know the soil conditions and climate challenges of the GTA and tailor waterproofing solutions to local needs.

Best Materials

We use high-performance membranes, drainage pipe, and waterproofing products built to withstand Ontario’s weather and groundwater conditions.

Peace of Mind

From permit handling to final cleanup, we plan every step carefully so you can focus on your business.

Commercial Waterproofing Process

Site Inspection and Risk Assessment

We walk the property, identify moisture threats, and review your foundation layout to recommend a waterproofing system that actually fits your space.

Quotation and Permit Planning

You get a clear proposal with cost, timing, and product specs. We handle all municipal permits in advance so nothing delays the work.

On-Site Execution and Cleanup

Our team arrives on time, completes the job safely, and does a full cleanup once the system is in place. You also receive your warranty documents and a walk-through of the work done.

Frequently Asked Questions

What is the best waterproofing method for a commercial foundation in Toronto?

It depends on the site. Exterior membrane systems are best for new construction. For existing buildings, interior drainage and sump pumps are effective.

How long does commercial waterproofing last?

When installed properly using high-quality products, commercial waterproofing can last several decades. Aquamaster includes a 25-year transferable warranty on all waterproof services.

Can you waterproof an occupied commercial building?

Yes. We specialize in working around ongoing business operations with minimal disruption. Interior waterproofing is a popular choice for occupied spaces.

What are common signs that a commercial building needs waterproofing?

Signs include basement leaks, water stains, musty odors, mold growth, and foundation cracks.

Do you handle permits and inspections?

Yes. Our commercial waterproofing contractors take care of municipal permits and ensure your project meets all building codes and safety requirements.

What are your Service Areas?

Proudly Serving Toronto and Beyond

Get Started with 10% Off Today!

Trust Aquamaster for expert commercial waterproofing services in Toronto—our 25-year warranty is a testament to the quality and reliability of our work. Contact us today and receive 10% off your service!