Design and Maintenance of Roof Systems on Industrial, Commercial and Institutional Buildings
les 20, 21, 22 et 23 novembre 2023
Code : 14-1106-ONL23
After participating in the course, you will be able to:
- Identify roof system types and components
- understand roof system design principles and function as part of the building envelope
- understand the roof as a depreciating asset within the life cycle of a building
- assess the maintenance requirements of existing roofs
- prevent premature failures of roofing systems by implementing a roof maintenance program
- diagnose & remedy roof integrity problems
- avoid potential problems by understanding causes of roofing failures
- understand the decisions surrounding a capital roof repair project
The efficient performance of roof systems is integral to the function of all buildings. Improper design and the absence of maintenance of roof systems can have significant economic impacts. These impacts, combined with the increased use of roof surfaces for other building functions, and the continued evolution of roofing products and environmental requirements, means that roofs can no longer be considered “out of sight, out of mind”.
This course provides objective information on the most current practices with respect to roofing design, maintenance, management & rehabilitation.
- Basic Design Requirements: Envelope, Structure, Durability
- Roofing Systems Review: Systems, Components, Detailing
- ‘New Age’ Design Requirements: Environment, Safety, Space Utility
- Viewing Your Roof as an Asset - Life Cycle Performance
- Roof Condition Assessments
- Roof Maintenance Programs
- Re-Roofing vs. Retrofit/Recovery
Who Should Attend
Building Owners & Managers • Civil Engineers • Architects • Plant Managers/Engineers • Maintenance Managers • Specification Writers • Roofing Consultants • Contractors & Suppliers • Technicians & Technologists • Construction Supervisors • Industrial Engineers • Plant Operations Managers & Supervisors • Consulting Engineers & Architects • Facilities Managers & Superintendents
10:30 am to 3:00 pm Eastern (Will include a 30 minute lunch break)
Horaire : 10:30 AM - 3:00 PM EDT
voir le programme complet
Welcome, Introduction, Course Preview, Learning Outcomes and Assessment Method
Basic Roof Design Requirements
What does a roof do? How is it expected to perform? The basic requirements of roof systems are discussed.
- Building Envelope Requirements: water penetration, water vapour movement, air leakage, thermal resistance, continuity
- Structural Requirements: wind loads, snow loads, seismic issues, live loads, fire resistance
- Durability Requirements: UV exposure, moisture resistance, mould resistance, corrosion, chemical and fatigue resistance
- Evolving roof design requirements: Vegetative roofs and reflective roofs, rainwater retention, space utility for building occupants, rooftop safety: railings, roof anchors, ice guards, photovoltaic systems, design changes for a changing climate
Roof Design for Control
How has roof design evolved? How are roofs designed to control environmental loads? Roof design concepts and methods are discussed.
- Control of precipitation – roof slopes, hydrokinetic vs. hydrostatic, flashings, drainage design
- Thermal control – insulation design, energy codes
- Control of air leakage and water vapour
- Resistance to fire
- Structural attachment
Case Study: Roof Thermal Resistance Calculations
Building Codes now specifically require the analysis of energy use, and hence thermal resistance, of building envelope components as part of the building design process. An example is presented of thermal resistance calculations for a roof system and the impact of the roof thermal performance on overall building energy use.
Case Study: WIND-RCI - Wind - Roof Calculator on Internet
Roofing Systems, Materials and Components
All the major roofing systems will be reviewed generically along with their respective pro’s and con’s, design options and application methods:
- Design configuration: inverted vs. conventional vs. vented hydrokinetic vs. hydrostatic
- Membranes: single ply (TPO, PVC, EPDM), modified bitumen, built-up roofs (standard, hybrid)
- Insulations, cover boards, and thermal barriers
- Air/vapour barriers, fasteners and roof decks
- Application methods (hot. cold, torch, heat welding, self-adhesive)
- Sloped roof systems – shingles, metal and tiles, architectural vs. structural
- The critical importance of roof detailing around equipment and penetrations
- Roofing accessories
The Life Cycle of Roofs and Roof Assessments
- Roof life cycle within the building life cycle
- Roof Assessments: visual reviews, test openings
- Moisture in roofs and moisture surveys: thermographic / capacitance / nuclear
- Electronic leak detection (ELD), wind uplift testing
- Lab tests of materials
- Estimating remaining service life
Roof Maintenance and Repair
- Who does it? -- Tasks and workflow
- Common sense maintenance procedures
- Technology use - reporting, databases, tablets and drones
- When maintenance becomes repair
- When roofs are beyond repair -- capital versus operating expenses
Roof Retrofit and Replacement
- A re-roofing project or a roof retrofit project are different from each other, and very different from roofing a new building, even though the same materials and some of the same procedures are used. The single biggest difference is that the building is being used and occupied. Understanding these differences and managing the design, tendering, and construction efforts to reflect them, are essential to a successful capital roofing project. These differences and typical re-roofing project procedures are discussed.
- Replacement vs. recovery vs. retrofit -- definitions
- Project scope-setting - what factors influence how far to go?
- Factors influencing design - lots of them!
- Building code and building permit requirements
- The design package - specifications, drawings, details, warranties, reliance on manufacturers
- Procurement and Contracting vehicles - general contractor vs. trade contractor vs. construction manager
- The tendering process - roofer qualifications
- Effects of the construction process on building operations and anticipating them
- Effects on building occupants
- Quality assurance during construction - ‘inspection and testing’
- Post construction - releasing holdback, warranties, cleanup, commissioning
Summary - Dealing Effectively with the Inevitable
The life cycle of a building is longer than that of its roof, so roof maintenance and capital repair or replacement are a necessary part of any building asset management plan. The knowledge gained in this Course will allow designers, assessors and managers to acquire and provide more timely and accurate information for this process, and improve its effectiveness. Most importantly, continuous and ongoing attention to the roof, even though it may be out of sight, will prevent the major and costly surprises that are most detrimental to building owners and occupants alike.
Ted Sheridan is a professional engineer practising in Ottawa, Ontario. He is president of Fishburn Sheridan & Associates Ltd., specializing in roofing, building envelope and structural work. He is a 1983 graduate of the Civil Engineering program at the University of Waterloo, and was recognized by RCI (now IIBEC) as a Registered Roof Consultant in 1992. He is also an IIBEC-accredited Registered Exterior Wall Consultant, Registered Waterproofing Consultant, and Registered Building Envelope Consultant.
Ted has been involved with investigations, assessments, design and field review in over 2500 roof and building envelope related projects across Canada and in the U.S.. He has lectured on a wide array subjects in roofing technology and building envelope engineering, has published several roof-related articles, and regularly provides technical support to building forensic and legal teams.
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