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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

    At Canadian Brothers for Construction Inc., we specialize in delivering high-quality interior and exterior renovation services, tailored to meet both residential and commercial needs. Our core services include: • Painting: We offer expert interior and exterior painting solutions using premium materials and techniques to ensure smooth finishes, sharp lines, and long-lasting results. Whether it’s a fresh coat or a full color transformation, we bring your space to life with precision. • Drywall Installation & Repair: From full drywall installation for new builds to patching and repairing damaged walls or ceilings, we provide seamless finishes that are ready for paint and perfectly aligned with your interior design needs. • Mudding & Taping: We professionally apply joint compound and tape to drywall seams, corners, and screw holes to achieve a flawless, smooth surface. Our finishing work is clean and ready for the next stage of decoration or painting. • Framing: Our team builds strong and accurate wall and ceiling frames for both renovations and new construction. We ensure every structure is straight, level, and up to code. • Popcorn Ceiling Removal: We safely and efficiently remove outdated popcorn ceilings, giving your ceilings a clean, modern finish. We also repair any imperfections and apply smooth or textured finishes as desired. With years of experience, a focus on detail, and a commitment to customer satisfaction, we ensure your project is completed on time and with the highest standards.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Concrete Pros Specializes in Concrete Line pump services, Concrete Services , Asphalt, Residential Excavation - Dump Truck services- Junk removal - waste removal.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Ontario Roofing Construction has been proudly serving the community for many years, delivering top-quality roofing and masonry work with unmatched craftsmanship and reliability. Known for our expertise, attention to detail, and commitment to excellence, we’ve built a strong reputation as one of the most trusted names in the industry.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Welcome to House of A’s, your premier destination for exceptional concrete work, stunning paint jobs, and reliable handy services that transform spaces with excellence and artistry. Situated at the intersection of functionality and aesthetics, we are dedicated to enhancing residential and commercial properties through our unparalleled craftsmanship and customer-focused At House of A’s, we believe that every space has a unique story waiting to be told. Our mission is to bring your vision to life, whether it’s through the robust durability of our concrete solutions, the vibrant palette of our painting services, or the meticulous perfection of our handy work. Founded on a commitment to quality and integrity, we strive to exceed expectations in every project, creating environments that inspire and endure.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Alpha Masonry and Roofing is a trusted name in the construction industry, boasting over 45 years of expertise in providing top-quality masonry and roofing solutions. Our services encompass a wide range of needs, including chimney repairs, shingle roofing installation, foundation waterproofing, step construction, and exterior wall enhancements. We take pride in our craftsmanship and commitment to customer satisfaction, offering a robust 20-year warranty on our work to ensure peace of mind for our clients. At Alpha Masonry and Roofing, we combine experience with quality materials and skilled labor to deliver durable, reliable solutions tailored to your property’s needs.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    I have been working with insulation and drywall taper for 5 years. I started very young, at 17 years old, but I have always done excellent, professional and quality work.

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  • Basement Waterproofing Specialist in Thornhill, Ontario

    Dhaliwal Construction specializes in high-quality framing carpentry, drywall installation, insulation, HVAC services, and washroom tile work. With a commitment to excellence and attention to detail, we ensure that every project meets the highest standards of craftsmanship. Our experienced team is dedicated to transforming spaces and delivering results that exceed client expectations. Whether you're renovating or building from the ground up, Dhaliwal Construction is your trusted partner for all your construction needs.

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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

    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

    Concrete Slabs, patios, Steps Waterproofing,

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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

    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

    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

    With over 10 years of hands-on experience, I deliver reliable, high-quality roofing, masonry, and exterior restoration services across the entire Greater Toronto Area (GTA). From pitched shingle and flat roof repairs to brickwork and eavestrough care, every job is handled with precision, durable materials, and direct communication. ​Whether you need an urgent leak stopped, damaged brickwork repaired, or clogged eavestroughs cleared, I provide dependable craftsmanship designed to protect your home against Ontario's harshest weather. ​Services Offered ​Pitched Shingle & Flat Roof Repairs: Fast leak detection, missing shingle replacement, flashing fixes, flat roof patching, and seam sealing. ​Masonry Services: Brick repair, chimney rebuilding, tuckpointing, mortar repair, and parging to preserve structural integrity. ​Eavestrough & Drainage: Cleaning, realignment, leak repair, downspout adjustments, and eavestrough replacement to ensure proper water flow. ​Preventive Inspections: Thorough assessments to identify minor issues before they turn into costly structural repairs. ​Why Choose Leeroy Francis? ​10+ Years of Experience: Deep expertise across complete exterior protection—roofing, brick, and drainage. ​

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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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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.

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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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