Service: Roofing

Steven P. Bourdeau

Steven P. Bourdeau, RRO, CCCA, CSP

Project Principle
Steven P. Bourdeau

Steven investigates and consults on the design, inspection, testing, and maintenance of roofing and building envelope systems, including mould and asbestos investigation and remediation. Steven manages the sales and marketing for and is directly involved in all aspects of roof analysis, failure investigation, plans and specifications, quality assurance, site review, pre-construction design review and testing, inclusive of thermal infrared surveys.

Services
Roofing Building and Structural Restoration
Email
Office Location
Burlington
Education
Ryerson Polytechnic University – Advanced Architectural Technology, Marketing Management, and Advertising Programs
Association
Construction Specifications Canada | Devis de Construction Canada
International Institute of Building Enclosure Consultants
111 Scotia Court, Whitby

111 Scotia Court, Whitby

111 Scotia Court, Whitby
A deteriorating roof with leaks, poor drainage, and designated substances was converted into a durable, watertight structure, ensuring lasting dryness and functionality.
Services
Building and Structural Restoration Specialty Testing
Subservices
Roofing
Sector
Industrial
Duration
2021-2023
Client
Thermo Fisher Scientific Inc.
Partners
Peritus Environmental
Project Value
$4,200,000
Project size
1 building (110,000 sq ft)

The facility at 111 Scotia Court is Factory Mutual (FM) insured and has a total of approx. 110,000ft2 of conventional roofing over a distribution center.

The project included the replacement of the existing BUR roof assembly throughout with a new TPO roof assembly, roof drainage upgrade, and asbestos abatement. 

Pretium was engaged in the spring of 2021 to aid in roof rehabilitation efforts at the facility. Over the subsequent two to three months, Pretium conducted reviews of the various affected systems, providing services such as: 

  • Thermography (IR Scan) 
  • Roof Assembly Review 
  • Roof Structure Review 
  • Roof Drainage Review 
  • A roofing-specific DSS (Designated Substance Survey) carried out by our sister company, Peritus Environmental.

Throughout the summer of 2021, Pretium developed specifications and drawings for a full roof replacement to FM requirements, roof drainage system upgrades, and asbestos abatement, prepared by Peritus. The project was tendered in the autumn of 2021, with Pretium’s assistance in contract preparation. Construction review and contract administration were provided by Pretium until the project’s completion in early 2023. 

To deliver this project, Pretium completed the following measures:

Thermography

Thermography

Infrared thermography is used in building science to detect thermal variations in building envelope assemblies using non-destructive infrared (IR) radiation detector sensing equipment. Detection of these thermal variations can be used to identify a variety of potential deficiencies.
Condition Assessment / Feasibility Study

Condition Assessment / Feasibility Study

A detailed assessment of existing conditions, including drawings, permitted use, failure mechanisms, and remedial options, allows for clients to choose the building restoration and renewal program that best suits their objectives.
Structural Review

Structural Review

Our structural team provides the design of unique and innovative foundations and other building structures in provinces across Canada. Our designs are often substituted for more common engineered solutions that are impractical or too expensive. We develop structural solutions where other solutions fail to meet a client’s needs
Roof Drainage Review

Roof Drainage Review

Our team will conduct a thorough review of your roof’s drainage systems, identifying potential issues and recommending solutions to be incorporated into your roof renewal program. Proper roof drainage is crucial for preventing damage and maintaining the integrity of your roof and building.
Designated Substances Survey

Designated Substances Survey

Working with our sister companies through the C3 Group, our team can offer either project-specific or whole-building designated substance surveys (DSS) to our clients.
Design and Specifications

Design and Specifications

Design documents describe the project scope, materials, and procedures based on information collected during the assessment/feasibility phase with the Owner’s agreement on approach and budget. They communicate to the contractor in a way that promotes refined pricing and increases the potential for success through improved workmanship, fewer changes and disruptions to occupants, a shorter schedule, and cost within budget.
Tendering

Tendering

A fair and competitive tender process is followed for both public and private projects. During the tender process, we respond to queries, prepare addenda, and walk the work area with the bidders. On closing of tenders, we prepare a written summary and analysis of the bids received.
Contract Administration and Construction Review

Contract Administration and Construction Review

Once a contractor is selected, our team periodically visits the site to confirm that the work is being completed in accordance with the project specifications and provides contract administration from start to completion.

Client Benefits 

The roof replacement not only eliminated designated substances within the original roof assembly but corrected numerous water infiltration issues and improved rooftop drainage.

Pretium worked with the project team to complete the work while the building was fully occupied. This included working with the contractor to schedule and phase the work to minimize impact. 

Overview of the existing roof exhibiting evidence of deterioration and a build up of sediment/vegetation due to inadequate drainage.
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A close up view of the level of deterioration and build up of sediment/vegetation on the existing roof.
2 / 5
Thermography and moisture probes were performed to determine the extent of moisture infiltration in the existing roof assembly.
3 / 5
Overview of the roof replacement in progress.
4 / 5
Overview of the completed new reflective roof addressing the water infiltration and drainage issues, and meeting the clients strict insurance requirements (Factory Mutual (FM) Global).
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Project Team

Dave Moore

Dave Moore

President, Project Principal
Laura Barbon

Laura Barbon

Project Manager
Larry McCuaig

Larry McCuaig

Senior Project Principal
Jeff Livingstone

Jeff Livingstone

Project Principal, Mechanical Engineering Service Area Leader

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1401 Boulevard Talbot, Chicoutimi

1401 Boulevard Talbot, Chicoutimi

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A roof condition assessment and consulting work were completed for the largest shopping centre in the Saguenay–Lac-Saint-Jean region, resulting in a strategic roof replacement plan including budget estimates for capital and operations.
Building and Structural Restoration
111 Scotia Court, Whitby

111 Scotia Court, Whitby

Low Slope Roof Consulting
A deteriorating roof with leaks, poor drainage, and designated substances was converted into a durable, watertight structure, ensuring lasting dryness and functionality.
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518 Mohawk, Hamilton

518 Mohawk, Hamilton

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Your Project, Our Expertise – Let’s Make It Happen

Our expert team is here to help you achieve your goals.

Get In Touch
1401 Boulevard Talbot, Chicoutimi

1401 Boulevard Talbot, Chicoutimi

1401 Boulevard Talbot, Chicoutimi
A roof condition assessment and consulting work were completed for the largest shopping centre in the Saguenay–Lac-Saint-Jean region, resulting in a strategic roof replacement plan including budget estimates for capital and operations.
Services
Building and Structural Restoration Specialty Testing
Subservices
Roofing
Sector
Commercial / Institutional
Duration
2022-2024
Client
Primaris REIT Corporation
Partners
Partners
Project Value
<$1,000,000
Project size
1 building (740,000 sq ft)

The commercial retail building had 91 roof sections, totaling approximately 741,000 ft2,  and was constructed in three major phases from 1973 to 1986 with smaller additions made from 1993 to 2019.

The project began with a roof condition assessment in 2022. Thermography identified several anomalies, and subsequent test cuts confirmed moisture trapped in several assemblies. Test cuts also revealed that most of the roof sections were renewed by installing a new assembly over the original assembly, and in some cases a third assembly was installed, raising concerns about structural loading. Pretium calculated the approximate dry/wet weight of each roof section for the client and their structural engineer’s review. 

Working within the client’s budget to replace as much roofing as possible, Pretium prioritized four roof sections (32,300 ft2) that were replaced in 2023. Pretium’s involvement included providing design, technical specifications and drawings, tendering, project management, and construction review for this phase of the project. 

Further assessment was then carried out in 2023 with repeated thermography and additional test cuts, further confirming moisture in some assemblies and multiple assemblies having been installed on most of the sections. A strategic roof replacement plan was finalized including budget estimates for capital replacement and operations (maintenance and emergency repairs). The plan was divided into phases spanning 15 years. Annual assessments were planned to prioritize annual work based on current conditions. 

Pretium then provided design, specifications and drawings for tender of the replacement of 12 roof sections totaling over 100,000 ft2 beginning in 2024.

To deliver this project, Pretium completed the following measures:

Thermography

Thermography

Infrared thermography is used in building science to detect thermal variations in building envelope assemblies using non-destructive infrared (IR) radiation detector sensing equipment. Detection of these thermal variations can be used to identify a variety of potential deficiencies.
Condition Assessment

Condition Assessment

A detailed assessment of existing conditions, including drawings, permitted use, failure mechanisms, and remedial options, allows for clients to choose the building restoration and renewal program that best suits their objectives.
Roof Openings / Test Cuts

Roof Openings / Test Cuts

Our team creates small openings to determine roof compositions including the type of membrane, type and thickness of thermal and tapered insulation, and overall roof assembly height, type of vapour barrier, and the condition of the roof deck. Openings also allow us to confirm the presence of moisture in the roof.
Design and Specifications

Design and Specifications

Design documents describe the project scope, materials, and procedures based on information collected during the assessment/feasibility phase with the Owner’s agreement on approach and budget. They communicate to the contractor in a way that promotes refined pricing and increases the potential for success through improved workmanship, fewer changes and disruptions to occupants, a shorter schedule, and cost within budget.
Tendering

Tendering

A fair and competitive tender process is followed for both public and private projects. During the tender process, we respond to queries, prepare addenda, and walk the work area with the bidders. On closing of tenders, we prepare a written summary and analysis of the bids received.
Contract Administration and Construction Review

Contract Administration and Construction Review

Once a contractor is selected, our team periodically visits the site to confirm that the work is being completed in accordance with the project specifications and provides contract administration from start to completion.

Client Benefits 

Pretium helped identify potential structural overloading at many roof sections which prompted the client to initiate a revised structural analysis of all roof sections.  

We also helped to educate the client regarding best roofing practice regarding the installation of new materials over existing. Pretium identified the replacement value of the roofing based on local market conditions, which helped the client to secure a significant budget plan for the next 15 years. The greatest challenge was prioritizing roof replacement based on so many factors, all of which that are not typically experienced on a single property including: 

  • budget
  • age and condition of multiple assemblies on the majority of roof sections 
  • moisture content 
  • structural concerns on a significant number of roof sections 

This challenge involved many meetings and conversations with the client and internally. Working with the client to secure an immediate, significant budget for critical replacement was a challenge, considering the extent of required roof replacement in the short term. 
 

Being a property situated in Quebec, all technical documents are required to be produced in French for distribution to contractors. Significant time and effort were required to overcome this challenge. 
 

Due to the physical size of this property and the fact that many of the roof sections required attention in the short term, physically assessing the roofs, performing two thermographic scans and test cuts on over 80% of the roof sections, and organizing the information into a single report was also a challenge that was overcome by significant team effort. 
 

Ultimately, the client has been very satisfied with the result and has praised Pretium for our diligence and expertise.

Test cut to confirm the roof configuration including membrane and insulation types and thicknesses. The test cuts are also used to confirm the presence of moisture within the assembly at locations identified during the infrared scans.
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Infrared thermograph of the roof area identifying a potential leak location.
2 / 6
A view of an area of the roof with a number of rooftop mechanical units, including walkways installed in the high traffic areas around the equipment.
3 / 6
Cleaning of the roof membrane using a wire brush.
4 / 6
Exposed metal roof deck following removal of the roof membrane and insulation.
5 / 6
Installation of the new roof in progress.
6 / 6

Project Team

Jean-Guy Levaque

Jean-Guy Levaque

Senior Project Principal, Director of Sales and Client Relations
John Thornton

John Thornton

Technical Specialist (Roofing)

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255 Riverside Drive East, Windsor

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A deep energy retrofit achieving EnerPHit Certification, resulting in a new building exterior, improved air quality and a more than 60% reduction in energy consumption and greenhouse gas emissions.
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1177 Bloor Street, Mississauga

1177 Bloor Street, Mississauga

Balcony and Building Envelope Restoration
Extended the life of the building by revitalizing the aging building envelope systems and infrastructure, and creating new spaces for community use, while staying under budget.
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518 Mohawk, Hamilton

518 Mohawk, Hamilton

Balcony and Building Envelope Restoration
A restoration project was completed, resulting in a brand-new look, with more occupant comfort, less energy use, and minimal disruption.
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Canlan Ice Sports – Scarborough

Canlan Ice Sports – Scarborough

Low Slope Roof Consulting
An economical and lightweight waterproofing solution was reconstructed over existing standing seam metal roofs while maintaining interior ice rink and facility operations at a multi-purpose recreation and entertainment facility.
Building and Structural Restoration
111 Scotia Court, Whitby

111 Scotia Court, Whitby

Low Slope Roof Consulting
A deteriorating roof with leaks, poor drainage, and designated substances was converted into a durable, watertight structure, ensuring lasting dryness and functionality.
Building and Structural Restoration

Your Project, Our Expertise – Let’s Make It Happen

Our expert team is here to help you achieve your goals.

Get In Touch
Canlan Ice Sports – Scarborough

Canlan Ice Sports – Scarborough

Canlan Ice Sports – Scarborough
An economical and lightweight waterproofing solution was reconstructed over existing standing seam metal roofs while maintaining interior ice rink and facility operations at a multi-purpose recreation and entertainment facility.
Services
Building and Structural Restoration
Subservices
Roofing
Sector
Commercial / Institutional
Duration
2016-Today
Client
Canlan Ice Sports
Project Value
$1,560,000
Project size
17,000m2

Canlan Ice Sports – Scarborough is a is a state-of-the-art multi-purpose recreation and entertainment facility featuring five NHL and one Olympic-sized playing surfaces.

Covering the rinks and the restaurant are six roof sections constructed from a pre-engineered metal roofing system with fiberglass insulated blanket and an integral vapor barrier. The existing standing seam metal roofs were showing signs of stress due to leaks; causing corrosion of the purlins and interior damage.

The selected PVC membrane roof reconstruction design moved the insulation (and dew point) above the metal panels. This eliminated the formation of any trapped moisture and the insulation below the roof deck.  By removing the interior insulation this allowed the purlins to be repaired, cleaned and painted.

To deliver this project, Pretium completed the following measures:

Condition Assessment and/or Feasibility Study

Condition Assessment and/or Feasibility Study

A detailed assessment of existing conditions, including drawings, permitted use, failure mechanisms, and remedial options, allows for clients to choose the building restoration and renewal program that best suits their objectives.
Design and Specification

Design and Specification

Design documents with comprehensive specifications and detailed drawings are prepared to describe the project scope, materials, and procedures. These documents are created based on information collected during the assessment and feasibility phase and with the Owner’s agreement on the restoration and renewal approach and budget. Design and specification documents not only communicate the scope of work to the contractor but do so in a way that promotes refined pricing. An effective, collaborative planning and design process increases the potential for success during construction through improved workmanship, fewer changes and disruptions to building occupants, a shorter construction schedule, and a final cost within budget.
Tendering

Tendering

A fair and competitive tender process is followed. We offer tenders to pre-qualified contractors who have known skills for the required work. During the tender process, we respond to queries, prepare addenda, and walk the work area with the bidders. On closing of tenders, we prepare a written summary and analysis of the bids received.
Contract Administration and Construction Review

Contract Administration and Construction Review

Once a contractor is selected, our team periodically visits the site to confirm that the work is being completed in accordance with the project specifications and provides contract administration from start to completion.

Client Benefits 

The PVC roof recovery increases the life expectancy
by 20 to 25 years.

The installation of new insulation and membrane above the metal roofing kept the roofing work separate from the interior remedial work. This approach also allowed the building to remain operational throughout the construction.

Benefits of PVC membrane roofing: 

  • Durability and Longevity 
  • Energy Efficiency 
  • Low Maintenance 
  • Waterproof and Leak-Resistant 
  • Chemical Resistance
Installation of new insulation and PVC membrane system over the existing metal roof.
1 / 4
Overall view of PVC roof reconstruction in progress.
2 / 4
PVC roof reconstruction, including the tie-in at existing rooftop mechanical equipment and skylights.
3 / 4
Installation of the new PVC roof membrane, detailing around existing mechanical equipment.
4 / 4

Project Team

Amy Machnik

Amy Machnik

Senior Project Manager
Navindra Budhwa

Navindra Budhwa

Project Manager
Ryan Calder

Ryan Calder

Building Science Consultant
John Pogacar

John Pogacar

Senior Project Principal
Sharon Widanagama

Sharon Widanagama

Project Coordinator
John Thornton

John Thornton

Technical Specialist (Roofing)

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255 Riverside Drive East, Windsor

255 Riverside Drive East, Windsor

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A deep energy retrofit achieving EnerPHit Certification, resulting in a new building exterior, improved air quality and a more than 60% reduction in energy consumption and greenhouse gas emissions.
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518 Mohawk, Hamilton

518 Mohawk, Hamilton

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A restoration project was completed, resulting in a brand-new look, with more occupant comfort, less energy use, and minimal disruption.
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1401 Boulevard Talbot, Chicoutimi

1401 Boulevard Talbot, Chicoutimi

Low Slope Roof Consulting
A roof condition assessment and consulting work were completed for the largest shopping centre in the Saguenay–Lac-Saint-Jean region, resulting in a strategic roof replacement plan including budget estimates for capital and operations.
Building and Structural Restoration
1177 Bloor Street, Mississauga

1177 Bloor Street, Mississauga

Balcony and Building Envelope Restoration
Extended the life of the building by revitalizing the aging building envelope systems and infrastructure, and creating new spaces for community use, while staying under budget.
Building and Structural Restoration
250 Fennell Avenue West, Hamilton

250 Fennell Avenue West, Hamilton

Low Slope Roof Consulting
A thorough review, testing, and modeling provided essential insights for the client, ensuring alignment with IO Sustainability Guidelines and offering cost-effective repair options for low-slope roofing systems.
Building and Structural Restoration

Your Project, Our Expertise – Let’s Make It Happen

Our expert team is here to help you achieve your goals.

Get In Touch
250 Fennell Avenue West, Hamilton

250 Fennell Avenue West, Hamilton

250 Fennell Avenue West, Hamilton
A thorough review, testing, and modeling provided essential insights for the client, ensuring alignment with IO Sustainability Guidelines and offering cost-effective repair options for low-slope roofing systems.
Services
Building and Structural Restoration Specialty Testing
Subservices
Roofing
Sector
Government
Duration
2019
Client
Colliers Project Leaders
Project Value
$ 11,000
Project size
1 building (12,800 sq ft)

A thorough review, testing, and modeling provided essential insights for the client, ensuring alignment with IO Sustainability Guidelines and offering cost-effective repair options for low-slope roofing systems.  

The facility is one storey, has a footprint of approximately 1190m2 (12,800ft2), and houses a public health lab requiring OPS security clearance. The purpose of the roof study was to provide a detailed condition assessment of the existing roof assembly including drains, flashings, etc. Physical review, thermography, destructive testing, and preliminary energy modeling using RETScreen were performed by Pretium.

The report included findings of the physical review, thermographic scan, and destructive testing, as well as multiple repair/replacement options considering IO Sustainability Best Practice Guidelines, and opinions of probable cost. The report also included annual maintenance recommendations, an analysis and comparison of several low slope roofing systems, as well as preliminary energy modeling and considerations. 

Client Benefits 

Pretium determined the overall condition and estimated the remaining service life of the existing roof, made recommendations regarding repair vs. replacement, and provided opinions of probable cost. Pretium developed a roof maintenance manual for the owner.

To deliver this project, Pretium completed the following measures:

Condition Assessment / Feasibility Study 

Condition Assessment / Feasibility Study 

A detailed assessment of existing conditions, including drawings, permitted use, failure mechanisms, rnand remedial options, allows for our clients to choose the building restoration and renewal program that best suits their objectives.
Infrared Thermography

Infrared Thermography

Infrared thermography is used in building science to detect thermal variations in building envelope assemblies using non-destructive infrared (IR) radiation detector sensing equipment. Detection of these thermal variations can be used to identify a variety of potential deficiencies.
Roof Openings / Test Cuts

Roof Openings / Test Cuts

Our team creates small openings to determine roof compositions including the type of membrane, type and thickness of thermal and tapered insulation and overall roof assembly height, type of vapour barrier, and the condition of the roof deck. Openings also allow for checking suspect areas that may be actively leaking and testing using a Delmhorst Moisture Meter.
Energy Modeling

Energy Modeling

A quantitative tool that assists designers in evaluating the environmental, technical, and financial viability of a proposed building retrofit or design for a new building. The data obtained from the analysis allows designers to communicate recommendations to building owners and managers more effectively. The information is used to identify optimal solutions.
Test opening in the roof membrane where a moisture meter is being used to confirm the findings of the infrared thermography.
1 / 4
General image of the condition of the existing roof membrane, with granule loss on the top surface.
2 / 4
Mechanical equipment and various roof penetrations located within the mechanical equipment enclosure on the roof.
3 / 4
Sample image from the infrared thermography that was completed on the roof showing a potential thermal anomaly.
4 / 4

Project Team

Dave Neal

Dave Neal

Project Principal
Jennifer Hogan

Jennifer Hogan

Project Principal, Director of Marketing, Energy and Carbon Reduction Leader
Mark Bechthold

Mark Bechthold

Project Principal, Assessment and Capital Planning Service Area Leader

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255 Riverside Drive East, Windsor

255 Riverside Drive East, Windsor

Deep Energy Retrofit
A deep energy retrofit achieving EnerPHit Certification, resulting in a new building exterior, improved air quality and a more than 60% reduction in energy consumption and greenhouse gas emissions.
Energy and Carbon Reduction
1177 Bloor Street, Mississauga

1177 Bloor Street, Mississauga

Balcony and Building Envelope Restoration
Extended the life of the building by revitalizing the aging building envelope systems and infrastructure, and creating new spaces for community use, while staying under budget.
Building and Structural Restoration
111 Scotia Court, Whitby

111 Scotia Court, Whitby

Low Slope Roof Consulting
A deteriorating roof with leaks, poor drainage, and designated substances was converted into a durable, watertight structure, ensuring lasting dryness and functionality.
Building and Structural Restoration
518 Mohawk, Hamilton

518 Mohawk, Hamilton

Balcony and Building Envelope Restoration
A restoration project was completed, resulting in a brand-new look, with more occupant comfort, less energy use, and minimal disruption.
Building and Structural Restoration
Metro Distribution Centers

Metro Distribution Centers

Third Party Building Envelope Consulting
A third-party review, completed during a global pandemic, with water and condensation investigations ensuring optimal building air tightness and thermal performance during and after construction.
New Construction

Your Project, Our Expertise – Let’s Make It Happen

Our expert team is here to help you achieve your goals.

Get In Touch