Describe your job with details to view a tailored list of pros.
Post your job

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

559 Results

Sort by:

  • Basement Waterproofing Specialist in Thornhill, Ontario

    We r concrete cutting ,demolishing and pouring company

    Get in touch
  • Basement Waterproofing Specialist in Thornhill, Ontario

    We specialize in construction, fencing, and concrete services across the GTA. We provide reliable, high-quality workmanship for residential and commercial projects, including fence installation and repair, concrete driveways, walkways, patios, foundations, interlocking, and general renovations. Our goal is to deliver durable results, fair pricing, and excellent customer service.

    Get in touch
  • Basement Waterproofing Specialist in Thornhill, Ontario

    12 years in general construction/ renovations 2 as a handyman.

    Get in touch
  • Basement Waterproofing Specialist in Thornhill, Ontario

    Welcome to Apex roofing and masonry we specialise in roofing ,masonry,and exterior restoration We provide reliable,high quality services for both residential and comercial roof repairs, replacements, chimney work, tuckpointing, concrete and waterproofing With skilled craftsmanship, durable materials and a commitment to customer satisfaction, Apex roofing delivers lasting results you can count on.

    Get in touch
  • Basement Waterproofing Specialist in Thornhill, Ontario

    ⭐ U&M CONSTRUCTION ⭐ Looking for reliable, high-quality work you can trust? Our team delivers fast, clean, and professional results every time. ✅ High-Quality Craftsmanship ✅ Fast & Reliable Service ✅ Affordable Prices ✅ Friendly, Professional Team ✅ Satisfaction Guaranteed Whether it’s repairs, installations, upgrades, painting, flooring, handyman work, or full home improvements—we get it done right the first time. 📍 Serving Pickering, Durham Region & GTA ⭐ Choose a company that takes pride in every job — big or small. Book your appointment today! ⭐

    Get in touch
  • Basement Waterproofing Specialist in Thornhill, Ontario

    Clean. Strong. Trustworthy. 2nd year apprentice

    Get in touch
  • Basement Waterproofing Specialist in Thornhill, Ontario

    Our Services: ✅ Concrete Work – Durable and high-strength concrete solutions, including foundations, driveways, sidewalks, and structural elements. ✅ Bathroom Construction & Renovation – Complete remodeling, including tiling, plumbing, waterproofing, and modern designs. ✅ Tile & Flooring Installation – Expert installation of ceramic, porcelain, hardwood, laminate, and vinyl flooring for a seamless finish. ✅ Drywall & Finishing – Professional drywall installation, repair, taping, mudding, sanding, and painting for smooth and durable walls. ✅ Baseboards & Trim Work – Precise installation of baseboards, crown molding, and trim for a polished interior look. ✅ Framing & Structural Work – High-quality wood and metal framing for new builds, additions, and remodeling projects. ✅ Staircase Construction – Custom-built staircases with superior materials, ensuring safety, durability, and aesthetic appeal. ✅ New Basement Development – Complete basement finishing, including framing, insulation, drywall, flooring, and lighting, to transform your space.

    Get in touch
  • Basement Waterproofing Specialist in Thornhill, Ontario

    I am working in a construction business more than 10 years . I do framing, drywall installation, taping ect. Wall paper installation and removal,painting, spray painting popcorn ceiling repair or removal ect.

    Get in touch
  • Basement Waterproofing Specialist in Thornhill, Ontario

    Insulation and HVAC Contractor running business from 3 years at affordable prices

    Get in touch
  • Basement Waterproofing Specialist in Thornhill, Ontario

    Hi there! My name is Rafael. I specialize in small-scale home repairs, maintenance, and those handy tasks around the house that you might not have the time or tools to finish. No job is too small for me! Whether you need a quick fix, a small repair on your home's exterior, or general upkeep to keep everything running smoothly, I am here to help. I pride myself on being reliable, punctual, and clean. My goal is to deliver high-quality work with honest pricing and excellent communication so you can have peace of mind. Feel free to send me a message with what you need done. Let’s get those small projects fixed!

    Get in touch
  • Basement Waterproofing Specialist in Thornhill, Ontario

    The reason why we’re highly revered is that not only do we offer the highest-quality insulation products and services, but we also take great pride in the quality, efficiency and safety that comes with our work which is later reflected by the smiling faces of our happy customers. And because of that, many of our customers have saved thousands of dollars on heating and energy bills every year. If you’re new to the concept of spray foam insulation or have previously considered it but were put off by its cost and commitment, then this is the perfect time to fill yourself in with as much knowledge as we can provide you with. Compared to other types of insulation services that help you save up about 30% on average, spray foam insulation can save you on energy costs at an average of 50% or even more.

    Get in touch
  • Basement Waterproofing Specialist in Thornhill, Ontario

    Reliable craftsmanship you can trust. We specialize in framing, fences, decks, and renovations, delivering quality work built to last. From start to finish, we focus on detail, durability, and customer satisfaction.

    Get in touch
  • Basement Waterproofing Specialist in Thornhill, Ontario

    We are a full-service construction and renovation company specializing in concrete work, landscaping, and interlocking solutions. Our team delivers high-quality craftsmanship for residential and commercial projects, including driveways, walkways, patios, foundations, and concrete repairs. In addition to concrete services, we also provide expert landscaping and interlock installation to enhance outdoor spaces with durable and visually appealing designs. We further offer skilled interior and exterior renovation services, including drywall installation and electrical work, ensuring complete project solutions from start to finish. Our focus is on quality, reliability, and customer satisfaction—delivering strong, long-lasting results on every project, big or small.

    Get in touch
  • Basement Waterproofing Specialist in Thornhill, Ontario

    Concrete specialist, windows and doors installation

    Get in touch
  • Basement Waterproofing Specialist in Thornhill, Ontario

    Egress windows and side doors in gta and surroundings in reasonable price

    Get in touch
  • Basement Waterproofing Specialist in Thornhill, Ontario

    We do Plumbing and mechanical fibre glass insulation + Dry wall insulation, contact us to get you next job done

    Get in touch

4.7

Top rated Basement Waterproofing Specialists

Our Basement Waterproofing Specialists in Thornhill, Ontario, are rated 4.7 out of 5 based on 45 reviews from homeowners like you.

Quality screening

Easily find verified local pros. Just post your job to get quotes from pros near you across Canada.

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.

Other pros in Thornhill, Ontario

Cities