Ontario Building Code and Foundation Drainage
Basement waterproofing in Ontario is primarily governed by Part 9 of the Ontario Building Code (O. Reg. 332/12), which establishes minimum requirements for foundation drainage and dampproofing for housing and small buildings. The regulation can be consulted in full at ontario.ca/laws/regulation/120332.
Part 9 requires that foundation walls be dampproofed or waterproofed depending on the intended use of the basement space and the groundwater conditions at the site. For habitable basement spaces, the Code requires that the foundation system includes perimeter drainage at the footing level to collect and redirect groundwater, and that the drainage system discharges to a sump pit, municipal storm system, or daylight outlet that meets setback requirements.
In Renfrew County, where deep frost penetration and high water tables are common, the application of Part 9 requirements is taken seriously by the local building department. Properties in areas with known groundwater issues may be required to provide additional documentation, including soil reports or groundwater studies, before permits are issued for new construction or major waterproofing work.
The Code also sets requirements for dampproofing materials applied to foundation walls below grade. Any membrane or coating must be installed to manufacturer specifications and must extend from the top of the footing to the finished grade level. In Renfrew County, where clay soils can exert additional moisture pressure, many building officials recommend upgrading from basic dampproofing to full waterproofing with drainage board for comprehensive protection.
Permits Required for Waterproofing in Renfrew County
Determining whether a permit is needed for waterproofing work depends on the scope of the project. The following general guidance applies in Deep River and throughout Renfrew County, but property owners should always verify requirements directly with the Renfrew County Building Department before starting any work.
Exterior Excavation Waterproofing
Exterior excavation around a foundation to apply waterproofing membrane, install weeping tile, or repair foundation walls generally requires a building permit. The permit application process typically involves submitting a site plan showing the excavation area, proposed drainage route, and discharge location. The building department will review the application for compliance with the Ontario Building Code, Property Standards by-laws, and zoning requirements for setbacks and drainage.
Renfrew County may also require a separate excavation permit or road occupancy permit if the work is near the property line, municipal right-of-way, or if construction equipment will be operating near public infrastructure. Permit fees vary based on the valuation of the work but typically range from $150–$500 for residential waterproofing permits.
Interior Drainage System Installation
Interior drainage work that involves cutting the concrete basement slab to install drain tile generally requires a permit because it affects the structural slab and alters the building drainage system. Renfrew County Building Department will want to review the proposed sump pump location, discharge routing, and confirmation that the discharge will not create drainage issues for neighbouring properties.
Some municipalities have specific requirements for sump pump discharge — it must be directed to a location that drains away from the foundation and does not flow onto neighbouring properties or municipal streets. Check with Renfrew County for any local discharge by-laws before finalizing the system design.
Minor Repairs and Surface Work
Minor repairs that do not affect the structure or drainage system — such as sealing a single visible crack from the interior side with a surface patch, applying a concrete coating, or regrading the soil surface around the foundation — typically do not require a permit. However, if the crack repair involves injection into the foundation wall, it is advisable to confirm with Renfrew County Building Department whether a permit is required, as injection involves penetrating the foundation structure.
WSIB and Insurance Requirements for Contractors
Waterproofing contractors in Ontario are not required to hold a specific provincial licence for waterproofing work. However, any contractor performing excavation, foundation repair, or construction work in Renfrew County must carry WSIB (Workplace Safety and Insurance Board) coverage. WSIB provides workplace insurance that protects workers in case of injury on the job — and protects property owners from liability if a worker is injured while working on their property.
Property owners should verify that any contractor they hire has a valid WSIB clearance letter and carries commercial general liability insurance of at least $2 million. Without this coverage, the property owner could be held financially responsible for workplace injuries or property damage that occurs during the project.
To verify WSIB coverage, ask the contractor for their WSIB account number and confirm it through the WSIB Clearance Service. A contractor who cannot provide WSIB proof should not be hired for any work that involves excavation, heavy equipment, or structural foundation work.
Renfrew County Building Department Jurisdiction
The building department for Deep River is the Renfrew County Building Department, which administers the Ontario Building Code for all municipalities within Renfrew County, including Deep River, Laurentian Hills, Petawawa, Pembroke, and the surrounding townships and unincorporated areas. The county building department is responsible for issuing permits, conducting inspections, and enforcing the Code for all building construction, renovation, and repair work that falls under the Ontario Building Code.
Property owners should contact Renfrew County Building Department directly for the most current permit requirements, fee schedules, and inspection processes. The building department can also provide information about any local by-laws that affect waterproofing work, including property standards by-laws, grading and drainage requirements, and any conservation authority requirements for properties near watercourses or in floodplain areas.
For properties within the Town of Deep River specifically, the building department application process may have additional local requirements. Always confirm with both the county and the local municipality before proceeding with construction work.
Key Regulatory Points Summary
- Ontario Building Code Part 9 sets minimum foundation drainage requirements for housing and small buildings.
- Exterior excavation waterproofing typically requires a building permit from Renfrew County Building Department.
- Interior drain tile installation that involves cutting the slab generally requires a permit.
- Contractors must carry WSIB coverage and general liability insurance.
- Property owners should verify insurance and WSIB status before hiring any contractor.
- Sump pump discharge must comply with local by-laws — typically at least 10 feet from the foundation and not directed onto neighbouring property or municipal roads.
- Renfrew County Building Department is the primary regulatory authority for building permits and Code enforcement in Deep River and throughout the county.