City Wide Group:
Frequently Asked Questions

The City Wide Group has created 10 Frequently Asked Questions regarding Waterproofing, Underpinning and Drains.

All of our employees receive extensive initial training, as well as continuous field training throughout the year. Most of our installers have been working in industry for a very long time, and have served our company for several years. Many of our employees have been with the company for 15+ years! We’ve been correcting basement waterproofing problems similar to yours since 1961!

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General Questions

Find answers to common homeowner concerns about foundations, drainage systems, sump pumps, and the basics of waterproofing.

Waterproofing Questions

Learn more about the causes of basement leaks, the benefits of interior vs. exterior waterproofing, and City Wide Group’s proven solutions.

Cost and Process

Understand the factors that affect waterproofing costs and get a clear overview of how our team repairs and protects foundations.

Mold and Indoor Air Quality

Explore what black mold is, how to identify signs of leaks or mold growth, and why early intervention is important for your health.

City Wide Group Warranty

Learn about our industry-leading Lifetime, Fully Transferable Warranty and how it protects your home for the long term.

Technical Terms and Questions

Get straightforward explanations of key industry terms like efflorescence, hydrostatic pressure, radon gas, and mold remediation.

Why would my basement drainage system need a sump pump and battery backup?

If water can’t drain by gravity, a sump pump collects and discharges it away from the foundation. A battery backup ensures protection during power outages, which often happen during heavy storms.

What is the difference between exterior and interior waterproofing?

Exterior waterproofing keeps water from penetrating foundation walls, while interior systems redirect it after it enters. Exterior protects structure long-term, while interior is a less costly short-term option.

What is weeping tile, and what does it do?

Weeping tiles are drainage pipes installed at the footing of your home’s foundation to move groundwater away and prevent leaks. City Wide Group installs 4″ ABS piping with protective sleeves to stop sediment buildup and ensure long-lasting performance.

What can cause a leaking basement?

Water can enter through cracks, mortar joints, tie rods, or window wells. Blocked or missing drainage systems also force water to find its way inside.

Why should I be concerned about basement waterproofing?

Leaks don’t just cause dampness — they can damage your foundation, trigger mold growth, and lead to costly repairs. Waterproofing is essential to protect your investment.

What does City Wide Group’s lifetime transferable warranty mean?

We are the only company in Toronto & GTA offering a true Lifetime Transferable Warranty. Once waterproofed, your foundation stays leak-free for the life of your home — and the warranty automatically transfers to future owners.

General Questions

A sump pump is required when your weeping tile system cannot discharge water naturally by gravity, or where building codes make it mandatory. It collects groundwater in a basin and automatically pumps it away from your foundation, preventing flooding. Because sump pumps run on electricity, they can fail during power outages — which often occur during storms when you need them most. A battery backup ensures continuous operation even if the main pump fails or electricity is cut. This combination of a primary sump pump and backup system gives you layered protection, reducing the risk of expensive flood damage.

Exterior waterproofing is a permanent, preventive solution that keeps water from ever penetrating your foundation walls. It involves excavation, cleaning and sealing the foundation, applying waterproof membranes, and installing new drainage tiles. This approach protects the structure of your home itself. Interior waterproofing, by contrast, is more affordable but reactive. It allows water to enter but diverts it beneath the basement floor into a drainage system that leads to a sump pump. While effective at managing water inside, it doesn’t prevent deterioration of the foundation over time. Homeowners seeking long-term protection and resale value often choose exterior waterproofing.

Basement leaks can start small but escalate quickly if left unchecked. Warning signs include damp walls, peeling paint, efflorescence (white chalky residue), musty odors, or visible mold. More advanced problems include pooling water, buckling flooring, swollen drywall, or damaged furniture. Even minor seepage indicates water pressure is acting on your foundation, and ignoring it can lead to costly structural repairs. If you notice any of these signs, it’s best to schedule a professional inspection right away.

Yes. City Wide Group has decades of experience working on both residential homes and commercial buildings throughout Toronto and the GTA. For homeowners, we provide basement waterproofing, foundation repair, underpinning, and mold prevention. For businesses, we handle waterproofing and drainage for multi-unit properties, retail buildings, and office complexes where water intrusion can damage operations or equipment. Our crews are trained to adapt to different building types and job scales, always delivering the same high-quality results.

City Wide Group has proudly served Toronto and surrounding areas since 1961. With over six decades of experience, we’ve seen every type of basement leak and foundation problem. Our long-standing presence in the industry demonstrates not only our expertise but also the trust thousands of homeowners have placed in us. Many of our employees have been with the company for more than 15 years, bringing deep knowledge to every job and ensuring consistent, high-quality service.

Most standard home insurance policies do not cover water seepage through basement walls or floors because it’s considered a maintenance issue. Policies may cover sudden, accidental water damage, such as a burst pipe or sewer backup, but long-term leaks caused by hydrostatic pressure or poor drainage are the homeowner’s responsibility. This is why proactive waterproofing is essential. Investing in a professional system protects your home from risks that insurance typically won’t pay for and adds long-term peace of mind.

Signs your basement needs waterproofing include cracks in the foundation, white powdery efflorescence, musty odors, peeling paint, damp walls, or visible mold growth. You may also notice condensation on windows, rust on appliances, or uneven flooring. These are early warnings that water is finding its way into your basement, and addressing them quickly prevents bigger issues such as structural damage or widespread mold.

Some homeowners attempt DIY fixes such as regrading soil, extending downspouts, or applying sealants. While these may provide temporary relief, they rarely solve the underlying problem. Professional waterproofing requires excavation, specialized membranes, drainage systems, and technical knowledge to ensure lasting protection. Attempting to waterproof your basement without the right materials or expertise may lead to recurring issues. City Wide Group ensures the work is done properly the first time, backed by our industry-leading warranty.

Weeping tiles are an underground drainage system installed at the footing of your home’s foundation. They collect groundwater that would otherwise press against the foundation and cause leaks, then redirect it safely away to a storm drain, ditch, or sump pump. Without weeping tiles, water pressure builds around the foundation walls and floor, leading to cracks, seepage, and even structural failure over time. City Wide Group installs 4″ ABS flexible piping with protective sleeves that prevent soil and sediment from clogging the system. This ensures smooth water flow and long-lasting drainage performance, protecting your basement for decades.Your Content Goes Here

Waterproofing Questions

Basement leaks can develop from multiple sources. Water often enters through cracks in the foundation walls or floors, mortar joints, tie rod holes, or the wall/floor joint. Window wells and improperly sloped landscaping can also direct water toward the foundation. If your home’s weeping tile system is clogged or missing, water has no escape route and will find its way inside. Left untreated, these leaks not only damage personal belongings but can also compromise the integrity of the foundation.

Waterproofing is not just about preventing dampness — it’s about protecting your home’s structure and your family’s health. Persistent leaks weaken concrete, rust reinforcing steel, and cause costly foundation damage. Damp basements also create the perfect environment for mold growth, which can trigger allergies and respiratory issues. Investing in waterproofing protects your largest investment, ensures a healthier living environment, and can increase your home’s resale value.

Yes. While cold weather may make excavation more difficult, many waterproofing systems can still be installed year-round. Interior systems, in particular, are unaffected by seasonal conditions. Exterior work can also be performed in winter, provided the ground isn’t frozen too deeply. Scheduling waterproofing in colder months can even mean faster service, since spring and summer tend to be peak seasons.

Dampproofing is designed only to slow moisture penetration through foundation walls. It uses materials such as tar or coatings that block some dampness but do not resist water under pressure. Waterproofing, on the other hand, uses durable membranes and drainage systems that fully block water infiltration, even under hydrostatic pressure. For true long-term protection, waterproofing is the superior choice.

Water seeps through the wall/floor joint when groundwater builds up around the home and hydrostatic pressure forces it upward. This joint is a weak spot in many basements because it’s where two structural elements meet. Without a drainage system to relieve pressure, water will exploit this seam, leading to leaks and pooling

We use industry-leading products including Bituthane rubber membranes, Delta MS plastic drainage boards, and ABS weeping tiles with protective sleeves. These materials are specifically engineered to withstand Toronto’s soil conditions and climate. By combining proven waterproofing technology with professional installation, we deliver durable systems that protect foundations for decades.

Underpinning involves excavating below the existing foundation to increase depth and reinforce stability. It is most commonly used in older Toronto homes with shallow basements where homeowners want to increase ceiling height for living space. It can also be necessary if the foundation is unstable or has shifted. Proper underpinning not only creates functional living space but also strengthens the structure for long-term safety.

Drainage tiles, also called weeping tiles, are perforated pipes that collect groundwater around the foundation and direct it away. When properly installed with gravel backfill, they create an effective path for water to drain rather than pooling against the foundation. This system is critical to keeping basements dry.

Window wells provide space around basement windows and prevent soil and water from pressing directly against them. With proper drainage, they stop water from pooling and seeping inside. Without them, windows can become a major weak point for leaks.

A sump pump actively protects your basement by removing excess groundwater collected in a sump basin. It provides peace of mind during heavy rainfall or rapid snowmelt. Without one, basements are far more susceptible to flooding, especially in areas with poor drainage.

Sump pumps can fail if the power goes out, the float switch sticks, or the discharge pipe becomes clogged. Lack of regular maintenance also leads to breakdowns. Having a battery backup and annual servicing greatly reduces the risk of pump failure when you need it most.

The two most common options are battery-powered and water-powered backups. Battery systems provide hours of protection during power outages, while water-powered backups use municipal water pressure to keep the pump running. Both provide crucial peace of mind during storms.

Inspect your foundation regularly for cracks, efflorescence, or dampness. Keep gutters and downspouts clear so water drains away from the house. Ensure soil grading slopes away from the foundation. Preventative care reduces pressure on the walls and lowers the risk of future leaks.

A backwater valve prevents sewage from flowing backward into your home during heavy rain or municipal sewer overloads. In many Toronto neighborhoods, this simple device can protect homeowners from devastating damage and costly cleanup.

Poor grading or heavy clay soil holds water against your foundation. Over time, this increases hydrostatic pressure and the likelihood of seepage. Proper grading and drainage systems ensure water flows away from the home, reducing stress on the foundation.

Cost and Process

Costs depend on excavation depth, soil type, landscaping, access to the foundation, and the severity of the issue. Projects with restricted access or deep foundations may cost more. City Wide Group provides free inspections and written estimates so you understand exactly what’s required before work begins. Waterproofing is an investment that not only stops leaks but also protects your home’s structure and long-term value.

The process begins with notifying utilities and marking the dig site. Our crew excavates down to the footing, cleans the foundation walls, and seals any cracks with hydraulic cement. A protective Bituthane rubber membrane is applied, followed by a Delta MS drainage board. New weeping tiles are installed, surrounded by gravel to improve water flow. Once the system is complete, we backfill, compact the soil, and restore landscaping. This comprehensive method ensures watertight protection.

Yes. Every homeowner receives a free on-site inspection and detailed written estimate. We believe in transparency, so you’ll know exactly what work is recommended and what it will cost before making a decision.

Interior waterproofing is generally less expensive because it doesn’t involve excavation, but it only redirects water after it enters. Exterior waterproofing costs more because of the labor and materials involved, but it provides the most complete and permanent protection for your foundation.

We offer flexible payment plans and financing options designed to make professional waterproofing affordable for every homeowner. These can spread costs over time while still protecting your home right away.

Most projects take between one and five days depending on size, depth, and complexity. Small sections can be completed in a single day, while larger or more complex foundations may require several days of work.

Excavation may temporarily disturb landscaping, driveways, or walkways. However, our crews work carefully to minimize disruption and restore the site when work is finished. We also clean up construction debris thoroughly.

Yes. Crawl space encapsulation seals off the area beneath your home to prevent moisture intrusion, mold growth, and energy loss. It’s an excellent option for protecting air quality and reducing heating and cooling costs.

Technical Terms and Questions

Efflorescence is the white, chalky deposit left when water seeps through concrete or brick and evaporates, leaving behind salts. It’s not harmful on its own but is a visible warning sign that water is moving through your foundation walls.

Hydrostatic pressure is the force exerted by groundwater in the soil pressing against foundation walls and floors. When the pressure builds, it forces water through cracks, joints, or porous concrete. Waterproofing systems are designed to relieve this pressure and prevent leaks.

Radon is a naturally occurring radioactive gas that seeps into homes through cracks or openings in the foundation. It is odorless and colorless, but long-term exposure has been linked to lung cancer. Proper sealing and ventilation reduce radon risk.

Mold remediation is the process of safely removing mold growth and addressing the underlying moisture source. It often includes cleaning contaminated surfaces, improving ventilation, and sealing leaks. Left untreated, mold can spread rapidly and damage property.

Street creep occurs when expanding concrete streets push against driveways and foundations, causing cracks and structural movement. Installing expansion joints helps relieve pressure and protect the foundation.

Expansion joints are intentional gaps filled with flexible material that allow concrete to expand and contract naturally. Without them, concrete can crack and damage foundations or slabs over time.

Mold and Indoor Air Quality

Black mold thrives in damp, poorly ventilated areas such as basements with water leaks. It can cause respiratory problems, trigger allergies, and worsen asthma. Waterproofing eliminates the excess moisture that allows mold to grow. Removing mold and correcting the water problem ensures a healthier living environment.

Musty odors, peeling paint, damp spots, efflorescence, and visible mold growth are common signs. You may also notice increased humidity, condensation on windows, or a general feeling of dampness in the basement.

Leaky foundations, poor ventilation, and high humidity are the leading contributors. In some cases, clogged gutters or improper grading around the house allow water to accumulate, creating a moist environment where mold thrives.

Yes. Professional waterproofing is the first step before finishing a basement. It ensures the space stays dry, protecting your investment in renovations, flooring, furniture, and drywall.

Absolutely. By removing water sources and preventing mold growth, waterproofing improves the air you breathe throughout your home. Reduced humidity also helps HVAC systems run more efficiently.

Lifetime, Fully Transferable Warranty

The City Wide Group prides itself on superior quality, adhering to the philosophy of doing things correctly from the outset and striving for unmatched customer contentment. Our assurance in our craftsmanship and wealth of experience makes us the only company in Toronto & the GTA to offer a real LIFETIME WARRANTY. Opt for The City Wide Group for foundation waterproofing, and we promise your treated area will remain free from water or moisture entry for as long as your house stands. Our services come with a warranty certificate that is transferable to endless future homeowners.

  • Before any digging gets underway, The City Wide Group ensures all utility services are informed and the dig site is clearly marked.

  • We first reveal the foundation’s walls and base, giving them a good clean to guarantee that the new concrete will bond well.

  • To deal with any cracks or openings in the foundation, we fill them with a specific type of cement before applying a fresh concrete layer over the entire area.

  • We then secure the foundation with a RUBBER BITUTHANE MEMBRANE for waterproofing, covering both the wall and its base.

  • Additionally, we attach a DELTA MS plastic mat along the foundation wall down to the base, aiding in water drainage.

  • New weeping tiles are installed to divert water from the foundation, surrounded by clean ¾” gravel to ensure proper drainage.

  • The dug-out soil is then replaced and compacted firmly to avoid any future ground movement.

  • After the work is finished, we thoroughly clean the site of any construction debris.

  • To wrap up, we repair and reinstate any outdoor spaces and landscaping that were affected by our work.*

    *completion status of grounds and landscape may vary dependent on agreement with City Wide Group.

63 Years Experience

TORONTO WATERPROOFING & UNDERPINNING PROFESSIONALS
Family Owned Waterproofing and Underpinning Experts since 1961
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