Skip to main content
Home » Services » Interior Waterproofing

Interior Waterproofing Services in GTA

Looking for reliable and experienced specialists for the interior waterproofing of your basement in Toronto? Entrust this job to the team of professionals at Quality Age Build!

Our Interior Waterproofing Services

Interior waterproofing Toronto is crucial, especially for basement-level property owners. This is because problems with dampness and flooding of premises often arise during operation. Waterproofing protects the structure from the destructive effects of groundwater, moisture, and unexpected water ingress.

Quality Age Build provides a comprehensive range of interior waterproofing services, ensuring dryness and comfort in your basement. Our company’s specialists have deep knowledge and understanding of the process, so you can be confident in the quality and timely completion of the work.

Interior waterproofing is not just a construction procedure; it’s caring for your comfort. Turn to the professionals at Quality Age Build and ensure the protection of your basement property from the harmful effects of moisture!

Advantages of Choosing Interior Waterproofing Over Exterior Waterproofing

Interior basement waterproofing Toronto is carried out in existing buildings and has its own features that provide several advantages.

Precise Sealant Application

Interior waterproofing aims to eliminate cracks and openings within the structure, effectively preventing water penetration. It provides an additional level of moisture protection, helping to maintain the integrity of the structure and extend its lifespan.

Protection for Concrete Structures

Most types of foundations are made of concrete, a durable and reliable material. Internal penetrating waterproofing is most effective for these structures. It prevents capillary moisture penetration through the concrete structure and waterproofs it.

Prevention of Mold Growth

Due to high air humidity and excessive moisture, mold and mildew develop, which negatively impact human health. Interior waterproofing ensures dryness and prevents their appearance.

Preservation of Property Value

Issues with high humidity and waterproofing can lead to serious damage to the building structure and deterioration of its overall condition. Interior waterproofing works prevent such problems, allowing you to maintain the market value of your property.

Maintenance of Structural Integrity

Interior foundation waterproofing Toronto effectively eliminates any sources of high humidity and water leakage, thus maintaining the structural integrity not only of the foundation but also of the entire house structure, as well as the properties of building materials.

What Are the Costs Associated with Interior Waterproofing in Toronto?

The cost of interior waterproofing in Toronto is by no means a static figure, as prices depend on several factors:

  • Scope of work. Each space has its own area; the larger it is, the more specialists and time are required to complete the waterproofing work. Accordingly, the service price will be higher.
  • Waterproofing method. Each method involves the use of specific materials. These can be plaster and penetrating compounds, injection resins, profiled membranes, etc.
  • Working conditions. To complete the work, it might be necessary to move furniture and demolish and rebuild walls or floors. As a result, prices increase due to additional labor costs.
  • Additional services. Some projects require services such as mold removal, installation of drainage systems, etc., which also affect the overall cost.

To find out the exact cost of waterproofing work, please contact our managers through any convenient means for you!

Indicators That Interior Waterproofing Is Needed

Unpleasant Damp or Moldy Odors

Dampness or mold can be a clear sign of moisture accumulation in the wall. They cause unpleasant odors and pose a health risk, especially for allergy sufferers and people with chronic respiratory diseases. If you smell musty or moldy odors in the basement or other basement areas, it’s a signal that you need to consider interior waterproofing.

Visible Stains Caused by Water

Usually, walls are combined with a strip foundation. Groundwater, coming into contact with the surface of porous structure walls, penetrates inside and becomes a source of wet spots and streaks on walls, floors, or ceilings. Therefore, this is a common problem in basements or basement areas. If you find that you have wet walls, it’s worth considering interior waterproofing.

Wall or Foundation Cracks

Cracks in walls or foundations are one of the reasons for water seepage into the building. This can lead to serious problems: the appearance of mold and mildew, damage to the building structure, corrosion of metal elements, as well as problems with air exchange and air quality. Use interior waterproofing services if you notice cracks and feel dampness in the room.

Accumulated Water or Damp Spots

The accumulation of water inside the basement is a serious issue that requires immediate intervention. Water can accumulate for various reasons: leaks in water or sewer pipes, insufficient drainage, etc. But the most common reason is violations of the technology of external house waterproofing. Do not ignore this issue—order interior waterproofing.

Walls Bowing or Buckling

Bowed basement or basement walls are a bad sign. If not corrected immediately, there is a high probability that the walls will collapse over time. This problem often arises from the hydrostatic pressure of water in the soil surrounding the house foundation. Interior waterproofing can reduce this pressure, so consider performing these works.

Elevated Humidity Levels

The normal humidity level is 40-60%. Elevated humidity can lead to mold, mildew formation, and other problems, such as damage to wooden structures, wall coverings, and ceilings, as well as the appearance of unpleasant odors. If the humidity in your basement or cellar is 70% and above, it indicates the need for interior waterproofing.

Excessive Use of Sump Pump

When the sump pump is working actively, it is a clear sign that water is seeping into the basement. Therefore, if you notice that the device frequently turns on, it may indicate a leak source. In this case, you cannot do without a complex of interior waterproofing services.

Visible Presence of Mold or Mildew

Mold and mildew are not just aesthetic issues but also cause unpleasant odors and surface damage and threaten building integrity. Their presence on walls, ceilings, and other surfaces indicates a problem related to high humidity. It should be addressed immediately to prevent consequences.

Construction site with new cinder block basement walls and waterproofing over an excavated area, signalling an expansion project

Interior Waterproofing Process

Our team guarantees timely completion of work and a high-quality result that meets your expectations.

Prepare the surface

Specialists remove all finishing layers down to the base if they exist. They clean off dirt, grease, dust, rust, and other defects.


If there are cracks or gaps in the walls, ceiling, or floor, they are filled with hydraulic cement.

Installation of waterproofing material

Depending on the waterproofing method, special paints, pastes, films, or delta membranes that can prevent water penetration are used.

Installation of drainage system

Specialists set up a drainage system to improve waterproofing.

Finishing touches

The final stage involves finishing work. Any voids formed on the floor are filled with concrete, while walls and ceilings typically remain uncovered.

Materials Used for Interior Basement Waterproofing in Toronto

We only use high-quality materials from trusted and reliable suppliers for internal waterproofing. Depending on the waterproofing method, these may include:

  • Waterproofing membrane
  • Waterproofing paints and coatings
  • Cementitious waterproofing compounds
  • Sealants, putties, etc.

By using the services of Quality Age Build, you can be assured that your basement will remain dry and safe for many years to come.

Certified Waterproofing Services

We have all the necessary licenses and certificates that give us the legal right to provide interior waterproofing services in Toronto. This is proof that we adhere to quality standards and guarantee the safety of the work performed.

A map highlighting Quality Age Build's service coverage in the GTA, encompassing Toronto, Brampton, Mississauga, Vaughan, and Hamilton.

Why to Work With Us

Quality Age Build is a team of true professionals. We have earned the trust of our clients because of the following advantages:

Rich experience

Our specialists have been performing waterproofing work for many years, enabling them to handle even the most complex tasks at a high level.

Adherence to deadlines and budget

Our company values your time and resources, so we strive to accurately adhere to the deadlines for completing work and the agreed budget.

Personalized approach

We believe that each project is unique, so we pay special attention to understanding the needs and expectations of each client.

Professional service

Our managers are always ready to answer your questions, discuss ideas, and offer the best solutions for your project.

Our Projects

Basement waterproofing is a process that requires specialized knowledge and skills. We use various materials, sealants, and systems to ensure your basement’s dryness and reliable protection.

Here, you can view examples of our work.


What methods of interior waterproofing are employed to prevent leaks and moisture inside buildings?

Methods of interior waterproofing include using waterproofing membranes and sealants, installing internal drainage systems and sump pumps, and sealing cracks and leaks to prevent water infiltration.

Which types of rooms or structures require interior waterproofing, and are there specific requirements for different types of spaces?

Basements, underground garages, and any basement spaces require interior waterproofing. Specific requirements depend on the type of space and its usage, with basements being the main focus due to issues with increased humidity.

What are the typical timelines set for completing interior waterproofing projects?

The timelines for completing interior waterproofing projects depend on the size of the space, the extent of damage, and the selected methods.

Our Happy Clients

Construction workers applying a black waterproofing membrane to the exterior foundation walls of a building, set against a sandy brick wall and clear skies above.