Waterproofing
Trusted Building Waterproofing Services in the Greater Toronto Area
Water has a way of finding the smallest cracks and turning them into big problems. At Bold Engineering, we provide expert building waterproofing services across the Greater Toronto Area to keep water out and your structure protected. From leaking walls to damp underground garages, our team identifies the source and provides practical solutions that work above and below ground.
Waterproofing Walls
Water penetration through walls doesn’t just cause cosmetic issues. It leads to mold, cracked finishes, damaged insulation, and, over time, structural deterioration. Our team investigates moisture paths through exterior walls, foundation joints, and mechanical penetrations. We work with all types of wall systems: concrete, masonry, EIFS, and cladding assemblies.
We’ll identify gaps in your air and water barriers, recommend effective sealing materials, and support you through repair or retrofit. For commercial buildings, residential towers, and institutional facilities, we provide clear guidance and complete documentation.
Waterproofing Underground Garages
Underground garages are exposed to hydrostatic pressure, temperature swings, and chloride-rich water from de-icing salts. These forces break down waterproofing membranes and corrode the structural concrete. Our specialists inspect drainage systems, membrane conditions, expansion joints, and surface slopes. We look for cracks, staining, and material delamination.
We’ll recommend detailed solutions that might include membrane replacement, joint detailing, traffic coating, or drainage upgrades. Our work helps extend the life of your garage structure and reduce the risk of unexpected shutdowns or insurance claims.
Balcony and Planter Waterproofing
Balconies and planters can be hidden sources of water ingress that damage both your building’s envelope and interior spaces. Poor drainage, aging membranes, and cracking can let water seep into structural slabs and wall assemblies, leading to mold growth and concrete deterioration. Our team inspects balcony slopes, membrane conditions, railing penetrations, and drainage details to identify current and potential issues.
We’ll provide detailed recommendations, from membrane replacements and edge flashing improvements to drainage redesigns. By addressing balcony and planter waterproofing proactively, you protect your building’s structure and reduce the chance of tenant disruption from leaks or repairs.
Roof Waterproofing and Leak Investigation
A leaking roof can damage finishes, insulation, and even structural elements if left unaddressed. Toronto’s freeze-thaw cycles, heavy rain, and snow loads challenge older roofing systems and expose weaknesses in membranes and drainage. Our engineers assess your roof system using moisture testing, infrared scanning, and detailed inspections to locate and document problem areas.
We will guide you on membrane repairs, flashing improvements, drain upgrades, and roof replacement planning when needed. Our goal is to extend the life of your roof while protecting your investment and maintaining your building’s performance through every season.
Why Work with Bold Engineering?
We’re not just another waterproofing contractor; we’re engineers with building science expertise. Our recommendations are backed by diagnostics, testing, and long-term planning. We bring deep knowledge of GTA building types and moisture performance across seasons:
- Experienced in commercial, residential, and institutional building assessments
- Knowledge of envelope systems, drainage, thermal performance, and material durability
- Diagnostic tools, including moisture meters, infrared scanning, and test openings
- Clear reporting with repair priorities and construction-ready documents
You’ll Know the Problem, and the Fix
When we complete your building waterproofing assessment, you won’t get a vague summary. You’ll see photos, understand causes, and have specific, practical next steps. Our goal is to help you prevent more serious problems before they affect your tenants or your budget:
- Stop leaks before they lead to structural repairs
- Avoid the spread of mold and air quality issues
- Protect concrete from corrosion, spalling, and early failure
- Improve energy performance with a better-sealed envelope
Take the Next Step
If you’re dealing with water ingress or deterioration, reach out to us at Bold Engineering in Toronto. Our experts in building waterproofing services are ready to investigate, assess, and guide you toward a practical, cost-effective solution.
Frequently Asked Questions
Here are answers to common questions about our building waterproofing services. If you don’t see your question, feel free to reach out, and we’ll help.
Building waterproofing refers to the systems and materials used to prevent water from entering walls, roofs, basements, and other structural elements. Effective waterproofing protects structural integrity while reducing the risk of mold and moisture damage. It also helps maintain energy efficiency by preventing damp conditions that can affect insulation performance.
Underground garages are exposed to groundwater and chloride-rich runoff, which can cause corrosion, leaks, and structural damage if not properly sealed. Without proper waterproofing, reinforcing steel in concrete can deteriorate, leading to costly repairs. Addressing waterproofing early extends the lifespan of your garage and protects tenant safety.
Look for mold, efflorescence, water stains, cracked concrete, peeling paint, and musty smells, especially after rain or snowmelt. Damp or humid conditions that persist can also signal hidden moisture ingress. You may also notice increased heating costs if moisture affects your building’s insulation.
Every 3 to 5 years for standard buildings, or more frequently if there’s visible damage or recurring leaks. Regular inspections help detect minor issues before they escalate into larger problems. Buildings in high-rainfall or freeze-thaw areas may benefit from more frequent checks.
Yes, we diagnose the source and recommend the right repair method, whether it’s membrane replacement, sealant work, or drainage redesign. We can also test to confirm the leak source before work begins. Proper repair ensures that moisture issues do not return in the same location.
No, we provide waterproofing solutions for walls, balconies, planters, roofs, and any other part of the building envelope. Balconies and planters often fail without proper waterproofing, leading to hidden leaks. Roofs with complex details also benefit from modern waterproofing methods to avoid long-term issues.
Yes, we use moisture meters, infrared imaging, and sometimes test openings to confirm the source and spread of the problem. Testing helps us target repairs accurately and avoid unnecessary work. It also provides clear documentation for property records and warranty purposes.
It depends on the material, use conditions, and maintenance. Many systems last 10–20 years or more when installed and maintained correctly. Regular inspections and prompt repairs can extend the lifespan of your system and protect your investment.
In most cases, repairs can be phased or planned during low-traffic times to avoid major interruptions. We’ll help coordinate with your team. Many waterproofing repairs can be completed without affecting day-to-day building operations, especially with proper planning.
