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NTL Contracting is a family-owned waterproofing company that provides professional basement waterproofing services in Toronto. We customize our services to our customers’ varying needs and situations and will help protect you from a wet basement.

Water is your basement’s worst nightmare. A wet basement can cause excess moisture in the air, leading to bad air quality, respiratory and health problems, and even the destruction of your many valuables. Even small amounts of water moisture in the air can cause mould and mildew to grow, putting your family, friends, and living space in jeopardy.

If you are facing a leaky basement, we will rectify your problem before it gets any worse. When you work with us, you can have peace of mind knowing that we will thoroughly inspect your space before and after making sure there are no outstanding water infiltration problems.

If you are looking to protect your property from water or moisture, call NTL Contracting to learn more about our waterproofing services. We offer waterproofing services for residential and commercial properties across Toronto and the GTA.

Toronto Waterproofing Company

NTL Contracting is proud to be one of the most reliable waterproofing companies in Toronto. We are known for delivering our services with a high level of professionalism, efficiency, and attention to detail.

If you are starting any new work in your basement, you can count on us. We will repair any problems with your foundation and make sure your basement is watertight before starting any additional work.

Our contractors are experienced with a variety of waterproofing solutions, including basement foundation repair, and will satisfy any of your basement waterproofing needs. NTL Contracting provides waterproofing solutions for all wet basement problems.

Professional Basement Waterproofing Services in Toronto

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Interior Waterproofing

If you have water damage in your basement, the chances are that you need interior waterproofing to rectify the situation and prevent future problems. Interior waterproofing contractors will remove the water that has seeped into your basements and complete the necessary repairs to avoid repeated damage. NTL Contracting offers professional interior waterproofing ​to help get you out of hot water.

How Interior Waterproofing Works:

There are two interior waterproofing methods that are commonly used to remove water from your basement. One common method is to seal your wall with vapor barriers made of plastic or foil to block out any further moisture.

Another interior waterproofing method is to reroute your water away from the foundation through interior drainage systems. This way, the excess water in your basement is diverted into a sump pit. This is a basin under your foundation that stores your sump pump — a water pump that pumps collected water out and away from your home.

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NTL Contracting provides grading services in Toronto to ensure that water flows away from your property and into proper storm drain systems.

How Grading Works:

The unfortunate reality is that, when your property’s ground slopes towards your home, water from storms and irrigation can run back toward your foundation and seep into your basement, causing moisture problems at its walls.

This can lead to problems like wall cracks, structural damage, and soil erosion. Grading helps prevent this problem altogether as it ensures that the ground’s highest point is at your foundation. With grading, you can rest easy knowing that any groundwater will always flow down this slope and away from your foundation.

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Crack Injection

In addition to waterproofing, NTL Contracting offers crack injection services to fill any cracks in your basement’s wall that may have occurred from water damage.

How Crack Injection Works:

When water seeps into your home’s foundation and, subsequently, your basement, it can cause cracks in your wall. You can fix some basement cracks with a polyurethane foam that expands into foundation cracks and seals the wall from further water penetration.​​

Why Choose NTL Contracting


NTL Contracting is a fully insured Toronto waterproofing company that has been servicing homeowners and business owners in the GTA for 20+ years.


We are a Canadian owned & operated waterproofing company committed to providing reputable services across Toronto and the GTA.


Forget about waterproofing companies in Toronto that are not upfront about their pricing.

NTL Contracting provides easy online quotes at no cost. When you work with us, there are no surprises or hidden fees.


NTL Contracting is committed to delivering a high standard of service. We work to ensure customer satisfaction every time and have glowing reviews to prove it.


Get a guaranteed, transferable 25-year warranty on our waterproofing services. We hold our work to high standards and want you to too.

The Risks of a Wet Basement

Leaks and cracks in your basement walls can allow water to get into your foundation and damage your property. A wet basement, whether caused by flooding or dampness from moisture, can have detrimental effects on your health and your property’s structural integrity.

When you are looking for Toronto waterproofing companies, consider the risks associated with a wet basement. When you are faced with a damp basement or want to take preventative measures to avoid such situations, you will want to work with NTL Contracting. Our Toronto basement waterproofing contractors are experienced with waterproofing and will provide you with the solution you need to ensure your basement is protected.

The risks associated with a wet basement includes:

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Leaks & Cracks: When your basement is wet, your walls and floors are more susceptible to leaks and cracks that can let in water during heavy rain and other weather conditions. This can cause long term and costly water damage and compromise the structural integrity of your home’s foundation.

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Unpleasant Odours: When wet clothes sit, the dampness creates a mildew smell. Similarly, when a basement is moist, the moisture causes a mildew odour that can overpower your basement and, in extreme cases, the rest of your home.

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Bacteria & Health Implications: A wet basement is a breeding ground for bacteria like mold and mildew. This build up of bacteria can have detrimental effects on the health of those living on a property as it can cause respiratory problems, trigger allergies, and more.

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Structural Damage: If your basement is damp, the moisture can cause your home’s foundation to rot and, as a result, compromise its structural integrity.

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Rodents & Insects: Moisture attracts unwanted visitors like various rodents and insects — waterproof your basement to prevent these pests from trying to make your basement their home.

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Allergens: In addition to breeding bacteria, a damp basement can also increase the allergens in your home like dust mites. This can have detrimental health effects on individuals in your household who have asthma and other respiratory conditions.

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Condensation: Moisture in your basement can cause condensation to build on your furniture and any other belongings stored in your basement. Condensation causes water to form that can damage your valuables and result in some long-term costs.

Basement Waterproofing Frequently Asked Questions

If water is seeping into your basement, your best solution is interior waterproofing. We provide interior basement waterproofing services to protect your basement from further water damage and repair any current damage.

Waterproofing is the process of sealing areas of possible water entry and reinforcing drainage to prevent moisture and water from penetrating a structure. There are various waterproofing methods you can use to protect your basement, and our waterproofing contractors have experience with all of these strategies. We will work with you to determine the best waterproofing method for your basement.

When you hire us for basement waterproofing, our concrete experts will put a seal on your basement’s concrete to prevent any water from getting into your home through the floor or walls. Additionally, if your home has a drain, we reinforce the drain to prevent any outdoor water from getting in.

Basement waterproofing will help you repair any current water damage in your basement and prevent water from seeping into your foundation in the future.

There are various ways that water can get into your basement, which is why it’s important for homeowners to waterproof their foundation to prevent a wet basement. Water can get into your basement through leaks and cracks caused by:

  • Flash freezes
  • Heat expansion and contraction
  • Hydrostatic pressure
  • Excess groundwater from heavy rain or other extreme weather conditions flowing into your home’s foundation

Basement waterproofing can benefit your home, health, and your wallet. Common benefits include:

  • Increased home value
  • Protection against water damage & leaks
  • Flood prevention
  • Reduced chances of costly moisture problems
  • Reduced health risks associated with moisture (e.g. poor indoor air quality, mould)

The most common basement waterproofing methods are interior and exterior waterproofing. Another waterproofing method, however, is drainage reinforcement. This is when your underground drains are cleaned out to ensure proper water diversion.

The best waterproofing method for your basement depends on your unique needs and expectations. If you are doing maintenance on your home and looking to protect your foundation from future water damage, exterior waterproofing will be your best solution.

That said, if you are already dealing with water damage and looking to rectify the situation and prevent further problems, interior waterproofing will be a better solution.

Various materials can be used for waterproofing, including:

  • Polyurethane
  • Cementitious Coating
  • EPDM Rubber
  • Rubberized Asphalt
  • Thermoplastic
  • Bituminous Membrane
  • PVC Waterproofing Membrane
  • Silicone Sealant
  • Crystalline Sealants
  • Elastomeric Coating