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Find basement waterproofing pros in Thornhill, Ontario

If you’re looking to protect your basement from leaks, floods, or humidity, HomeStars can help. Our platform allows you to easily connect with professionals who can help with basement waterproofing in Thornhill, Ontario. Compare quotes, read reviews, and make the hire all in one convenient place!

Closeup of a worker’s gloved hands waterproofing the bottom of a concrete wall with blue sealant.

Some of our top rated basement waterproofing specialists in Thornhill, Ontario

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Mianna Management and Contracting specializes in all exterior related work. From fencing, decks, concrete, asphalt, sealing, excavation, waterproofing, bollards, caulking, ect. We pride ourselves on quality of work and getting all jobs done in an efficient, safe, and cost effective manor.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    At Northbuild Inc., we specialize in delivering top-quality fencing, railing, and painting solutions tailored to residential, commercial, and industrial needs. With years of hands-on experience, our team is skilled in installing all types of fences—including wood, vinyl, chain-link, aluminum, composite, and ornamental iron—as well as custom railings that combine safety with aesthetic appeal. Our painting division offers expert interior and exterior painting services, ensuring long-lasting finishes with attention to detail and surface preparation. Whether it's a new project or restoration work, we take pride in enhancing the value and appearance of every property we work on. From durable fencing and elegant railings to precision painting, we bring craftsmanship, reliability, and customer satisfaction to every job.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Concrete Slabs, patios, Steps Waterproofing,

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    We are expert in any kind of house renovation and basement . Want to flip a house over asking price ? We are here to reach you out there. We will provide you all the related infomation regarding your each concern and build whatever you guys dream. More than 6 years experience. WILL BEAT ANY PRICE . Every thing will be under customer Budget and will be hand over within given time You can visit us on TIKTOK at DREAM DECOR RENOVATION

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    OSR GTA General Contractor is a trusted construction and renovation company serving homeowners and businesses throughout the Greater Toronto Area. With a strong commitment to quality craftsmanship, safety, and client satisfaction, OSR GTA specializes in residential and commercial projects ranging from full home renovations to custom builds and interior upgrades. Backed by experienced professionals and a detail-oriented approach, the company delivers reliable project management, transparent communication, and results that meet the highest industry standards.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Hi I’m 37 years old I have been working for many trades since I was 17 years old. I have experience and I specialize in water proofing basement, excavation, asphalt and concrete I’m a Forman for a construction company so know how to set up and organize jobs efficiently and properly to start and finish the job the right way I can do jobs from peel region, York region, simcoe region . King and Toronto and the gta I’m very flexible with my schedule and will always work and communicate with you to do the job the right way and to your schedule

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    At HR Homes, we are dedicated to delivering top-quality construction, renovation, and home improvement solutions. With years of expertise in the industry, we specialize in transforming residential properties into exceptional living spaces tailored to your needs. Whether you're looking to build a custom home, extend your existing space, or renovate your basement into a fully legal and functional unit, our team is committed to providing high-quality craftsmanship and unparalleled customer service. Our mission is to bring your vision to life with precision, reliability, and attention to detail. We take pride in our ability to handle projects of all sizes, ensuring that every aspect of construction and renovation is completed with the highest standards of excellence. At HR Homes, we believe in transparency, efficiency, and a customer-first approach, making your home improvement journey smooth and stress-free. Let us help you create the perfect space that meets your needs and enhances the value of your home. Contact HR Homes today to discuss your project!

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Hello, we work to make your life easier.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Hi, my name is Anton. I’ve been helping homeowners in Ontario with a wide range of home improvement services for several years. My experience includes both outdoor projects like landscaping, lawn care, and irrigation systems, as well as indoor services such as painting, furniture assembly, and small repairs. I’ve worked on everything from full yard makeovers to minor home upgrades, always focusing on quality and detail. Skills & Expertise Landscaping & Outdoor: Lawn care, sod installation, irrigation systems, landscape design, seasonal maintenance Interior Services: Indoor painting, drywall repairs, furniture assembly, minor plumbing & electrical help General Handyman: Mounting, heavy lifting, moving help, pressure washing, junk removal Why Hire Me I believe every home deserves the highest level of care—inside and out. My approach is simple: do it right the first time, provide excellent communication, and ensure every client is happy with the result. I’m reliable, detail-oriented, and treat every project as if it were my own home. If you need someone who can handle both inside and outside work with professionalism and quality, I’d be happy to help!

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Rayan Finish Concrete My name is Akram, and I am 34 years old, originally from Palestine. I am the proud owner of Rayan Finish Concrete, a company built on hard work, quality craftsmanship, and strong teamwork. At Rayan Finish Concrete, we are dedicated to providing our customers with durable, beautiful, and high-quality concrete finishes. We take pride in every project we complete, no matter the size. Our experienced team works together with professionalism, respect, and attention to detail to ensure that every customer is satisfied with the final result. We believe that teamwork is the key to success. Our employees are skilled, reliable, and committed to finishing every job safely, efficiently, and to the highest standards. Our Concrete Services Include: * Broom Finish Concrete * Stamped Concrete * Exposed Aggregate Concrete * Smooth Finish Concrete * Concrete Driveways * Concrete Sidewalks * Concrete Patios * Concrete Steps * Concrete Curbs * Concrete Garage Floors * Concrete Slabs * Concrete Repairs and Resurfacing * Custom Concrete Finishes

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    My company main purpose is exterior stucco , and parging & texture for foundation wall , interior painting , drywall,plaster and flooring

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    As a dedicated, self-employed contractor, I'm a master of all things concrete, drywall installation, paint, and windows. I bring expertise and precision to every project.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Working in these fields from past 3 year...Reason why you should consider me because i will do your job like mine .. ensure the things that wont affect anything while doing your job..treat your house like mine...! Give it a try

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  • Basement Waterproofing Specialist in Thornhill, Ontario
    • Best of Newly Listed 2025

    Concrete Azores specializes in a wide range of concrete services tailored to meet your needs. Our expert team excels in delivering top-notch solutions, including exposed aggregate, stamp concrete, broom finish concrete, and plain concrete finishes. With meticulous attention to detail, we offer parging services to enhance the durability and aesthetics of your property. Our expertise extends to landscaping projects, encompassing driveways, sidewalks, patios, porches, and driveway extensions. As seasoned concrete contractors, we are committed to delivering exceptional results that elevate the curb appeal and functionality of your outdoor spaces. Choose Concrete Azores for reliable and professional concrete solutions that exceed expectations. Exterior concrete - Exposed aggregate , stamp borders, plain / brushed concrete work including driveways, patios , walkways , retainer walls porch , landing and curbs. Check us out here: https://www.facebook.com/ConcreteAzoresLtd/

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    With over 10 years of hands-on experience in the construction and renovation industry, I specialize in insulation, drywall installation, drywall finishing, and painting services. I take pride in delivering high-quality workmanship that meets both residential and commercial standards. From framing and insulation to the final coat of paint, I manage every stage of the process with attention to detail, efficiency, and professionalism. Whether it’s a new build, a remodel, or repairs, I bring reliable expertise, clear communication, and a strong commitment to customer satisfaction. I understand the importance of timelines, budgets, and a clean job site, and I strive to exceed expectations on every project.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Red seal drywaller (interior systems mechanic) Red seal drywall finisher (tapers) Experienced tilers Bathroom renovator. 15 years Kitchen installers Decks and fences 10+ years Flooring installers Blow in insulation Masonry We are a well knit group of guys who love what we do. We work with you to make your visions come to life, within the budget you provide. Look forward to meeting you!

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4.9

Top rated Basement Waterproofing Specialists

Our Basement Waterproofing Specialists in Thornhill, Ontario, are rated 4.9 out of 5 based on 35 reviews from homeowners like you.

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What basement waterproofing services are available in Thornhill, Ontario?

Pros can waterproof basements from the interior, the exterior, or using a combination of techniques. The right service depends on whether you need full waterproofing or just touch-ups.

Here are some common basement waterproofing services in Thornhill, Ontario:

  • Installation of interior drainage systems: a perimeter drain installed along the interior footing collects and redirects water to a sump pit for removal.
  • Sump pump installation and replacement: often handled by a [plumber](https://www.homestars.com/plumbing/plumber-pros/Thornhill, Ontario), a pump installed in the sump pit removes accumulated groundwater and directs it away from the foundation.
  • Exterior waterproofing: excavation around the foundation allows for membrane application and drainage board installation to block water at the source.
  • Crack injection: epoxy or polyurethane foam is injected directly into foundation cracks to seal them against water intrusion.

No matter your needs, it’s easy to find basement waterproofing pros near you who can help. Just post your project on HomeStars now, and available contractors in your area can reach out!

What are the average costs of basement waterproofing pros in Thornhill, Ontario?

Basement waterproofing costs vary widely depending on the method, the size of the foundation, and where repairs are concerned, the extent of the damage. Labour typically runs between $50 and $150 per hour, depending on the service and complexity of the job. Materials and equipment, such as excavation machinery, may add additional costs.

Typical costs for common basement waterproofing services in Thornhill, Ontario:

  • Installation of interior drainage systems: between $3,000 and $10,000 for a full perimeter system in an average-sized basement
  • Sump pump installation and replacement: between $500 and $2,000 depending on pump type and whether a backup system is included
  • Exterior waterproofing: between $10,000 and $30,000 depending on foundation size and depth of excavation required
  • Crack injection: between $300 and $800 per crack depending on length, depth, and material used

HomeStars tip: To ensure you get the most accurate costs for Thornhill, Ontario, make sure to get everything written down in an itemized quote. This avoids misunderstandings and supports transparency and clear communication for both you and the contractor.

How to find basement waterproofing specialists in Thornhill, Ontario with HomeStars

Finding a basement waterproofing pro in Thornhill, Ontario can feel overwhelming, especially when water damage requires prompt attention. HomeStars makes it easy to connect with the right pro for your project. Just follow these simple steps:

  1. Start by posting your project. Provide a clear description of your basement waterproofing needs and, if possible, include photos to get precise quotes.
  2. Receive offers from available pros, review work history, and read customer feedback for basement waterproofing in Thornhill, Ontario.
  3. Connect with basement waterproofing specialists in Thornhill, Ontario to discuss your project, request and compare quotes, and ask any questions.
  4. Hire the right pro to get the job done and leave a review based on your experience.

HomeStars tip: Once your project is done, make sure to leave a review. Our review system ensures that pros are rewarded for good work and held accountable for any problems.

Pros on HomeStars undergo checks at registration – such as ID documents, company details, and certifications for regulated jobs and skill assessments – allowing you to hire with confidence.

Extra peace of mind with the HomeStars Confidence Program

The HomeStars Confidence Program is designed to give you added confidence when hiring through our platform. If your job qualifies under the Program and we determine that a claim meets the Program requirements, HomeStars may cover what you owe the Pro on an eligible job with a quote of up to CAD $10,000, in line with our terms and conditions.

FAQ: Common questions about basement waterproofing in Thornhill, Ontario

How long does basement waterproofing last in Thornhill, Ontario?

Most professional waterproofing solutions in Thornhill, Ontario are designed to last 10 to 25 years depending on the method used and the quality of installation. Sump pumps typically require replacement every 7 to 10 years.

Will waterproofing fix existing mould in my basement?

Waterproofing addresses the source of moisture but will not remove mould that has already formed. A separate mould remediation service is typically required before or after waterproofing work is completed.

What if my basement waterproofing project in Thornhill, Ontario requires excavation?

Exterior waterproofing projects in Thornhill, Ontario often require excavation around the foundation, which adds complexity, time, and cost to the overall job. It is important to work with pros who can coordinate this process effectively. [Local excavation specialists](https://www.homestars.com/gardening-outdoors/excavation-specialist-pros/Thornhill, Ontario) are available on HomeStars to walk you through what to expect and collaborate with your preferred basement waterproofing pro.

Does homeowner insurance cover basement waterproofing in Thornhill, Ontario?

In most cases, standard home insurance policies do not cover waterproofing as it is considered a maintenance issue rather than sudden damage. However, water damage resulting from a specific event such as a burst pipe may be covered. It is worth reviewing your policy or speaking with your insurance provider for clarification.

How do I know if a basement waterproofing pro is right for my project?

Not all waterproofing projects are the same, and finding a pro with the right experience for your specific situation is important. Reading reviews from homeowners who have had similar work done can help you make a more informed decision. Browse basement waterproofing pros on HomeStars to compare ratings and reviews from real homeowners in Thornhill, Ontario.

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