Commercial Roofing in London, Ontario

The cost of replacing a commercial roof varies widely, with project size being one of the biggest influences. Here are key factors that affect pricing:

• Building Envelope and Roof Performance: The condition of the existing roof assembly plays a major role. If the previous roof performed well, it may require fewer repairs. However, if the building’s internal use has changed over time, this can affect requirements for insulation, ventilation, and durability.

• Drainage and Structural Needs: Areas with poor drainage or where water has pooled for extended periods may have accelerated membrane wear, requiring more extensive repairs or adjustments. During replacement, we assess if any unused roof equipment or penetrations should be removed and whether any new equipment should be installed to meet the building’s current needs.

• Site Inspection: A thorough inspection identifies potential issues such as drainage design flaws or wear areas. We recommend having a certified professional, such as a RoofCheck-certified commercial roofing inspector, conduct the inspection to ensure accurate findings and guidance.

Once the roof size and inspection are complete, we tailor a roof assembly to the building’s specific needs. The final cost estimate takes into account the type of roofing membrane, the desired R-value for energy efficiency, and compliance with local and national regulations. With these factors defined, we present an accurate estimate to the client, ensuring a solution that fits both budget and performance requirements.

Choosing the best roofing material depends on the specific needs and characteristics of your project. Each commercial roof is unique, so the ideal material varies based on factors like budget, durability, and intended use.

Every type of membrane and assembly has its strengths and limitations. For example:

• EPDM (Ethylene Propylene Diene Monomer): A ballasted EPDM roof assembly can be an economical choice for large, open-concept buildings like warehouses. This material offers durability and environmental protection, often with similar warranty coverage to other options, but comes at a lower upfront cost. However, it may not be ideal for roofs that see high foot traffic or regular equipment maintenance.

• Modified Bitumen: This material is better suited for roofs that require frequent access or have high foot traffic due to its added durability. While it can be more costly initially compared to EPDM, it may be worth the investment for buildings needing consistent maintenance access on the roof.

Ultimately, the best material for your roof depends on balancing these considerations with your specific project’s requirements. A professional roofing assessment

Flat roofs are widely used on commercial buildings for several practical reasons:

• Efficient Use of Space: A flat roof provides ample room for essential systems like HVAC units, ductwork, satellite dishes, and large exhaust fans. Placing these systems on the roof keeps the interior clear for more usable workspace, enhancing productivity and flexibility within the building.

• Cost-Effectiveness: Installing a sloped roof on large, low-rise buildings (such as shopping centers) would be significantly more expensive. A sloped roof would need to be much taller to cover the vast area, increasing material and construction costs. Flat roofs offer a more affordable solution for covering large footprints without adding excessive height or expense.

• Architectural Flexibility: While they appear flat, these roofs usually have a slight slope (around 2% to 4%) to allow water drainage. A well-designed flat roof can effectively manage water, even with multiple penetrations for equipment, by using a seamless, watertight membrane. This makes them particularly suited for buildings in regions with heavy snowfall, as they reduce the risk of leaks by containing water rather than directing it down to the building’s edges.

In summary, flat roofs are cost-efficient, maximize interior space, and offer flexibility for adding essential equipment—all factors that make them a preferred choice for commercial properties.