Basement Waterproofing Oshawa

Aquamaster is proud to be a premier Basement Waterproofing Contractor in Oshawa, delivering trusted waterproofing, foundation repair, and drainage services since 2009. We’re locally based and understand Oshawa basement waterproofing — from freeze/thaw cycles to shifting clay soils. Our certified technicians manage every step—from discovery to durable resolution. We strive for clear timelines, transparent pricing, and respectful service, whether it’s a minor leak repair or extensive underpinning.

Award-Winning Waterproofing Contractor in Oshawa

With our 25‑year transferable warranty and strong record throughout Durham Region, we’re committed to keeping your basement dry, reliable, and weather-ready in all seasons.

Trusted Basement Waterproofing in Oshawa

Aquamaster has been protecting Oshawa homes with expert basement waterproofing and plumbing for more than a decade. We use durable materials like Delta MS and Aqua Bloc, and all work is done by our licensed in-house team—no subcontractors. With 24/7 emergency support and a 25-year warranty, we’re built to handle wet basements with long-term solutions.

Licensed & Insured Professionals – Our waterproofing crew in Oshawa is fully licensed and insured. We handle every detail and take full responsibility for the results.

25-Year Warranty – Our 25-year transferable warranty is included with every job. We believe in long-lasting work and stand behind it.

Trusted Oshawa Basement Waterproofing Experts – With many years of experience, we’ve solved every type of basement leak in Oshawa’s varied soil and climate conditions.

Advanced Basement Waterproofing Materials – We rely on strong waterproofing systems like polyurea membranes and premium-grade sealants made for Oshawa’s wet basements and foundation shifts.

Trust Aquamaster for expert basement waterproofing in Oshawa. Built on local experience, solid materials, and 24/7 support.

Best Basement Waterproofing Company in Oshawa!

Includes a 25-year transferable warranty, premium-grade waterproofing, and a FREE drain camera inspection.

Basement Waterproofing Services Available in Oshawa!

Basement waterproofing in Oshawa isn’t just about fixing leaks—it’s about making sure your home is ready for everything from spring rains to deep winter freezes. We offer a full range of waterproofing services designed to protect your foundation, prevent long-term damage, and keep your basement dry year-round.

Exterior Waterproofing Oshawa

Protect your Oshawa home by stopping water outside the foundation. We excavate, repair cracks, apply waterproof coatings, and install full drainage systems with weeping tile and boards. Soil is backfilled to restore surface strength.

Cost of Exterior Waterproofing in Oshawa – starting from $100 per linear ft

Interior Waterproofing Oshawa

Designed to manage interior basement moisture. We seal walls, install interior drainage (weeping tile), and add a sump pump to direct water safely away. Ideal for finished basements or when outside access is limited.

Cost of Interior Waterproofing in Oshawa – starting from $80 per linear ft

Weeping Tile Installation Oshawa

Controls groundwater and reduces pressure on basement walls. We dig along the foundation, install gravel-lined perforated pipes, and redirect water effectively. Keeps basements dry throughout the year.

Cost of Weeping Tile Installation in Oshawa – starting from $30 per linear ft

Sump Pump Installation Oshawa

We supply and service sump pumps to protect Oshawa basements. Units collect and pump water away from the foundation. Options include battery backup systems and upgraded pits.

Cost of Sump Pump Installation in Oshawa – starting from $700

Window Well Installation Oshawa

Prevents water from entering basement windows while boosting light and airflow. We install drainage around wells, add solid barriers, and reduce soil-related moisture intrusion.

Cost of Window Well Installation in Oshawa – starting from $1,800 per window

Backwater Valve Installation Oshawa

Prevents sewage backup during heavy rains. Installed in sewer lines with city-approved valves—and we assist with rebate applications when eligible.

Cost of Backwater Valve Installation in Oshawa – starting from $2,200 per unit

5-Star Reviews from 100+ Happy Oshawa Customers

Aquamaster has earned over 100 x 5-star customer reviews from happy Oshawa
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 269 reviews

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Aquamaster Basement Waterproofing Toronto did an excellent job from start to finish. David was courteous, arrived as scheduled, and took the time to explain the work before beginning. The project was carried out efficiently and with great attention to detail. Once the job was finished, the area was cleaned up and everything was left in great condition. The whole process was straightforward and well managed, and we’re very satisfied with the quality of the finished work.

Roman Nytka

02:56 09 Aug 26

We had a great experience with Aquamaster. They were incredibly easy to deal with from start to finish.After I called, they came out to assess the issue the very next day, and I had a quote within 8 hours. They built a new concrete retaining wall and fixed a leak around our basement window.A special thank you to our project lead, Yurii, who was fantastic throughout the entire project. He was responsive and made sure everything went smoothly from beginning to end.

Maxime Lebeau

12:40 14 Jul 26

Aquamaster Toronto handled a major exterior waterproofing project for us after years of drainage problems around the foundation. After every heavy rain, water would collect near one side of the house and we started noticing moisture slowly building up inside the basement. Roman came for the inspection and explained in detail how the old waterproofing had failed over time and why temporary repairs were not solving the actual problem. Yurii and the crew completed excavation around the foundation, installed a waterproof membrane, upgraded the drainage system, and carefully backfilled everything afterward. The whole process was organized and professional from start to finish. Since the project was completed, water drains away properly and there have been no more moisture issues in the basement.

Настя Крамськая

22:52 20 May 26

I wasn’t even sure if I had a real problem, just noticed the basement always felt a bit damp after rain. Aquamaster Basement Waterproofing came out and actually showed me what was going on behind the wall. The technician Albert explained that moisture was building up slowly and would get worse over time. They installed an interior drainage system with a sump pump and sealed everything properly. The job was clean and quick, and now the basement feels completely dry.

Кристина Олексиєнко

23:03 05 May 26

Didn’t think the issue in our basement was serious at first, just a bit of moisture near the wall. Aquamaster Basement Waterproofing came out and actually showed me that water was slowly getting in behind the surface. The technician (Kevin) explained everything clearly without overcomplicating it. They installed an interior drainage system with a sump pump and sealed the problem areas. After a couple of heavy rains, nothing — completely dry. Feels like it was fixed properly, not just covered up.

Nazar Merchanskyi

21:11 16 Apr 26

I wasn’t planning to do full waterproofing at first, just wanted to fix a small leak, but after talking to Aquamaster Basement Waterproofing it made more sense to do it properly. The guy who came out (I think his name was Alex) actually explained everything in a simple way without pushing anything. They installed an interior drainage system and sump pump, and sealed the problem areas. It’s been a few months now, including some heavy rain, and the basement is completely dry. Glad I didn’t go with another temporary fix.

Pr1 Vet

23:14 10 Apr 26

Aquamaster Basement Waterproofing helped us finally solve a leak that had been bothering us for years. Every time there was heavy rain, water would come in through the same area. Their team didn’t rush into the job — they first inspected everything properly and explained exactly what was causing the issue. They installed an interior drainage system, added a sump pump, and sealed all the cracks. The work was clean and well organized. Since then, the basement has stayed completely dry.

Anastasiia Trygub

04:25 28 Mar 26

Aquamaster Basement Waterproofing helped us finally fix a long-standing issue with moisture coming through the basement walls. Mike and Daniel came out, did a proper inspection, and explained everything in simple terms. They installed an interior drainage system and sealed the problem areas properly instead of just covering it up. What I appreciated most is that they didn’t rush the job — everything was done carefully. Since then, even after heavy rain, the basement stays completely dry.

Sofiya Mkv

21:47 20 Mar 26

Aquamaster Basement Waterproofing handled our exterior basement waterproofing project with impressive professionalism. Andrew supervised the excavation process around the foundation and ensured that the landscaping and surrounding structures remained protected. A heavy-duty waterproof membrane was applied evenly across the entire foundation wall to provide long-term protection. New weeping tiles were installed with proper slope to direct groundwater away from the home. The backfilling and grading were completed carefully to ensure proper drainage.

Kiril Tarasov

02:42 18 Mar 26

Aquamaster Toronto handled our exterior basement waterproofing project with impressive technical expertise. Andrew supervised the excavation process carefully to avoid unnecessary disruption to our landscaping. A commercial-grade waterproof membrane was applied evenly across the entire foundation wall. A new weeping tile system was installed with proper slope to ensure effective groundwater redirection. Backfilling and grading were completed professionally, improving drainage around the home.

Маша Мирошниченко

04:28 27 Feb 26

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

Our window well was flooding constantly. Aquamaster sent out Mark and Anna. They replaced the drain, sealed the concrete, fixed the grading outside, and made sure everything worked before leaving. They even tested it with water to confirm the issue was solved. Super reliable team.

Назар Павлів

04:53 25 Nov 25

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Foundation Repair Services in Oshawa

Our foundation repair services in Oshawa restore structural strength and enhance waterproofing. From underpinning to crack repairs, we stabilize your foundation and prevent future water damage.

Basement Underpinning Oshawa

We enhance basement depth and foundation strength. Ideal for older homes—adds headroom and structural integrity.

Cost of Basement Underpinning in Oshawa – starting from $80 per sq ft

Bench Footing Oshawa

Provides internal foundation support without exterior excavation. We pour concrete ledges to boost wall stability—helpful in Oshawa’s clay-rich soils.

Cost of Bench Footing in Oshawa – starting from $100 per linear ft

Basement Wall Crack Repair Oshawa

We repair cracks using epoxy or polyurethane injection. Carbon fiber reinforcement added for deeper structural needs. Prevents water intrusion and restores wall strength.

Cost of Wall Crack Repair in Oshawa – from $800 interior / from $1,800 exterior

Cost of Waterproofing in Oshawa

Oshawa basement waterproofing projects generally range from $1,000 to $25,000+, depending on layout and required services. Interior waterproofing runs $80–$180 per linear ft; exterior $100–$350. Crack repairs begin at $80; full foundation work varies on scope. Costs consider basement size, damage type, soil conditions, and access. Exterior methods cost more initially but offer lasting protection.

We provide upfront quotes and clear guidance on the best options.

Our Waterproofing Process in Oshawa

Free Inspection & Custom Plan

We begin with on-site inspection—evaluating cracks, leaks, and drainage. Then deliver a detailed plan with scope, timeline, and cost.

Professional Installation

Our licensed crew installs the system—be it interior or exterior waterproofing, foundation repair, sump pumps, or drainage upgrades—using materials suited for Oshawa homes.

Final Walkthrough & Warranty

We tidy the worksite, restore landscaping, and review the job with you. Our 25‑year transferable warranty gives long-term confidence.

Why Oshawa Homeowners Choose Us

25‑Year Transferable Warranty

Covers labour and materials; transfers with the home.

24/7 Emergency Response

Ready to respond to basement water issues anytime.

Certified & Fully Insured

Licensed professionals following safety and building standards.

First-Time Customer Savings

10 % off for new clients in Oshawa, with clear pricing.

Serving Homeowners

Local experience across Durham Region.

Local Team, Local Knowledge

We know Oshawa’s soil and weather conditions well.

Premium Waterproofing Materials

Trusted brands like Delta MS membranes and Aqua Bloc are used.

Complete Project Management

We handle permits, prep, installation, cleanup, and warranty.

Finished Basement Waterproofing Projects in Oshawa

Lifetime Warranty & Rebate

Every basement waterproofing job in Oshawa comes with our lifetime warranty on labour and materials—offering protection from day one. If you sell your home, the warranty is transferable to the new owners. We also help you access municipal or utility rebates for water management and efficiency work. Our team guides you through the submission process to maximize your eligible incentives.

Combining warranty and rebates helps lower the cost of basement waterproofing in Oshawa, ensuring reliable defense for years to come.

Frequently Asked Questions

Can waterproofing improve indoor air quality?

Yes—by eliminating dampness and halting mold, waterproofing Oshawa basements creates a healthier environment with better airflow and fewer allergens.

Will exterior waterproofing disturb my landscaping?

We protect your yard during installation. After membranes and drainage are in place, we restore the soil and sod to preserve your lawn’s appearance.

Are interior waterproofing systems long-lasting?

Absolutely. With a reliable sump pump and regular maintenance, interior systems provide durable protection for decades.

What’s the best waterproofing method in Oshawa?

It depends on your home’s structure and exposure. Exterior waterproofing offers the strongest defense, while weeping tile, sump pumps, and interior drainage offer effective backups.

Do all basements in Oshawa need waterproofing?

Not immediately, but due to local soil and weather, proactive waterproofing is advised to avoid costly future repairs.

What are the downsides of waterproofing in Oshawa?

Initial investment, installation disruption, and upkeep requirements. Proper professional work ensures long-term success.

How do you waterproof a finished basement in Oshawa?

We typically install interior drainage systems, sump pumps, and wall membranes that divert moisture while preserving your finishes.

What Postal Codes We Serve in Oshawa

Our mission is to deliver reliable waterproofing in Oshawa that shields your home from basement leaks, moisture, and foundation issues. We cover all Oshawa neighborhoods with expert systems and local knowledge. Licensed teams and premium materials, expertly applied.

We serve these Oshawa postal codes: L1H, L1G, L1J, L1K