National Building Code Standards: Roofing, Insulation, and Building Envelopes

Adhering to National Building Code Standards in London, Ontario

Ensuring your building project meets the latest safety and performance benchmarks is critical for long-term durability. At empcontracting.ca Inc. your construction contractor in London, Ontario, we strictly follow the National Building Code (NBC) of Canada, Division B, to guarantee that every material—from roofing membranes to thermal insulation—meets federal quality standards.

CGSB Standards for Roofing and Waterproofing Membranes

The NBC references several Canadian General Standards Board (CGSB) specifications for roofing systems. These include:

• Polyvinyl Chloride (PVC) Membranes: CAN/CGSB-37.54-95 standards for high-performance roofing and waterproofing.
• Bituminous Membranes: Modified, prefabricated, and reinforced membranes for superior protection (CGSB 37-GP-56M-1985).
• Elastomeric Liquid Membranes: Cold-applied solutions for non-exposed waterproofing applications (CAN/CGSB-37.58-M86).

Optimizing Thermal Performance and Vapor Barriers

To maximize energy efficiency and moisture control, empcontracting.ca Inc. your construction contractor in London, Ontario utilizes materials that comply with Section 9.25 of the NBC. Key standards include:

• Thermal Insulation: Phenolic faced insulation (CAN/CGSB-51.25-M87) and polystyrene loose fill (CGSB 51-GP-27M-1979) for enhanced R-values.
• Vapor Barrier Sheets: Polyethylene sheet specifications (CAN/CGSB-51.34-2022) are essential for maintaining the building envelope's integrity and preventing condensation.
• Breather Type Membranes: Sheathing membranes (CAN/CGSB-51.32-M77) that allow moisture to escape while protecting against air infiltration.

Exterior Finishes and Residential Siding Standards

For residential exteriors, the NBC provides specific guidelines for aluminum alloy sheets and siding. Our team ensures that aluminum siding, soffits, and fascia meet CAN/CGSB-93.2-M91 standards, providing your home in London, Ontario with both aesthetic appeal and long-term weather resistance.

Advanced Building Science: Radon Control and Airtightness

Modern construction demands attention to air quality and gas mitigation. The latest code updates emphasize:

• Radon Control: Implementing CAN/CGSB-149.11-2019 for new low-rise residential buildings.
• Airtightness Testing: Utilizing fan depressurization methods (CAN/CGSB-149.10-2024) to determine building envelope efficiency.

Whether you are renovating a historic place according to CHP 2010 guidelines or building a new structure, trust empcontracting.ca Inc. your construction contractor in London, Ontario to handle the technical complexities of NBC compliance.