Reken Right Solution

How Much Does Flat Roof Replacement Cost in Toronto?

Reken Right Solution

How Much Does Flat Roof Replacement Cost in Toronto?

Flat roof replacement costs are a common concern for our clients across the Greater Toronto Area (GTA). Whether it’s a residential flat roof on your home or commercial and industrial flat roofing assets, understanding the factors influencing costs can help navigate this complex question.

Initial Inquiries: One of the first questions we often receive is, “How much per square foot do you charge?” The honest answer is that roof replacement costs can vary significantly based on various factors and job site conditions.

Key Considerations:

Working Access and Structure Height:

The labor involved in getting materials onto the flat roof, handling debris, and

ensuring safety measures impact costs. Factors like working access, the number of stories, and considerations for pedestrian walkways, entrances, traffic flow, and hydro wires play a crucial role.

Detailed Roof Assessment:

Each flat roof is unique. Accurate measurements and documentation of specific details are essential for pricing. Two flat roofs of similar size may have different price points due to the complexity of details.

Layer Removal and Debris Handling:

The number of layers of flat roofing materials influences labor hours for removal. Consider a downtown residential flat roof with multiple layers, each weighing 750 lbs./per 100 square feet. Handling such debris from higher elevations can significantly impact costs.

Residential Perils:

Residential projects pose additional challenges, such as delicate debris handling, steep slopes leading to the flat roof, and considerations like hydro line coverage. These

factors contribute to variations in flat roof replacement costs.

Replacement Flat Roof Assembly:

The specifications of the replacement flat roof assembly are a key factor in determining costs. For older homes not built to modern code standards, retrofitting may require additional layers like a vapor retarder and thermal insulation. Structural repairs, including replacing rotted roof boards, are common in multi-layered flat roofs.

Commercial and Industrial Considerations:

For commercial and industrial projects, additional complexities arise. Disconnection and reconnection of HVAC equipment and associated gas line piping are standard. Corroded steel pan decking panels may require replacement during retrofit.

Appliances on the Flat Roof:

Various appliances on a flat roof, such as skylights, pipe protrusions, roof drains, and heat stacks, influence material, and labor requirements, contributing to the overall cost of a flat roof replacement project.

Challenges and Considerations in Residential Flat Roof Replacement;

Residential flat roof replacement projects often have unique challenges,

particularly when entry doors lead onto the flat roof. In such cases, the doors may need removal, re-installation, or complete replacement to ensure proper water

beneath the door sill.

Entry Doors and Roof Lounge Decks:

Addressing entry doors on flat roofs involves careful consideration of water details beneath the door sill. Removal, re-installation, or replacement may be necessary to achieve optimal waterproofing. Additionally, roof lounge decks, railings, and divider walls in semi-detached homes contribute to project costs, influencing the overall scope of the roof replacement.

Sheet Metal Work and Parapet Walls:

Details like the amount of sheet metal work required for capping the tops of parapet walls, roof-to-wall junctions, and flat roof perimeters contribute to the final project costs. These elements play a crucial role in ensuring a well-sealed and durable flat roof assembly.

Adjoining Shingle Slopes and Walls:

Flat roofs adjoining shingle slopes, sided walls, or stucco walls often require restoration or tie-ins to adjacent surfaces. This is crucial to achieving water-tight sealing for the

entire flat roof assembly. The complexity of tying in these surfaces influences the overall cost of the flat roof replacement.

Flat Roof Waterproofing Choices:

The choice of flat roof water plays a significant role in project costs, each having its merits and labor requirements:

BUR (Built Up Roofing  Tar and Gravel):

● Labor-intensive, requiring a kettle operator and multiple technicians for preparation, felting, hot asphalt pour, and final gravel process.

● Economies of scale on large commercial projects due to mechanized processes.

Modified Bitumen:

● Two-ply assemblies are less labor-intensive for waterproofing membrane application.

● Materials tend to be more expensive than BUR.

Single-Ply Assemblies (TPO or EPDM):

● Most labor is cost-effective due to large field sheets.

● Material costs are higher compared to BUR or Modified Bitumen assemblies.

Understanding the intricacies of each water choice helps in making informed decisions. While BUR may be labor-intensive but cost-effective on larger projects, modified bitumen offers a balance, and single-ply assemblies provide efficiency with higher material costs.

In conclusion, residential flat roof replacements involve a meticulous approach, considering various elements like entry doors, roof lounge decks, sheet metal work, and water choices. For tailored solutions and accurate cost assessments,consult with our experienced team at Reken. Checking for cracks, gaps, or missing flashing around chimneys and vents.