Advisory Bulletins
CRCA Advisory Bulletins provide information on technical issues that affect the roofing industry immediately, or for a particular time period.
June 2023Radiofrequency Radiation and Electromagnetic Fields
This bulletin will focus on radiation types, safety limits and mitigating exposure.
Read Online > Download PDF >November 2020
Torch Application – Guideline to mitigate rooftop fires
The purpose of this guideline is to promote awareness as it relates to the possible risk of rooftop fires during the application of roof systems involving open flames.
Read Online > Download PDF >November 2020
Review and Acceptance of Roof Deck prior to roof installation
In new construction and re-roofing, it is the responsibility of the design authority (structural engineer, architect, consultant) to inspect the roof deck and ensure that the roof deck meets the design and construction requirements for a particular project.
Read Online > Download PDF >June 2018
Re-roofing design considerations
There are several design aspects to be considered during re-roofing that may affect the serviceability of a newly installed roof system including structural loading, roof deck condition, roof drainage and hazardous materials.
Read Online > Download PDF >June 2018
Roofing Contractors and Designers Responsibility
Roofing contractors are responsible for the installation of roofing systems. The responsibility for design and specifications of a roof falls to the designer of record.
Read Online > Download PDF >June 2017
Uncommon Rooftop Hazards
There are many hazards that workers are exposed to when working on a rooftop.
Read Online > Download PDF >June 2017
Electrical Conduit Hazards
Roofing workers may encounter electrical conduit that is embedded within a roofing system or mounted directly to the underside of the roof deck, when completing roofing removals or mechanically fastening insulation or roofing membranes.
Read Online > Download PDF >June 2014
Roof Loading
Roof collapses are catastrophic in nature when they occur. Structural roof collapse can also lead to serious injuries for both workers on the roof and occupants of the building.
Read Online > Download PDF >June 2014
Roofing Preventative Maintenance
Roofing professionals generally agree that a good roofing system requires proper design, quality materials and quality installation to perform well.
Read Online > Download PDF >April 2014
Selecting a Roofing Contractor1 (steep-slope residential)
Buying a new roof system is an important investment. Before you spend your money, spend some time learning how to evaluate the roofing contractor who may do the work.
Read Online > Download PDF >April 2014
Selecting a Roofing Contractor1 (low-slope commercial)
Buying a new roof system is an important investment for building owners. Before money is spent, some time should be invested to evaluate potential roofing contractors.
Read Online > Download PDF >November 2012
Waterborne Adhesives and Coatings
Stringent federal regulations limiting the concentration of Volatile Organic Compounds (VOCs) in bituminous and non-bituminous roof coatings recently came into place.
Read Online > Download PDF >November 2012
Moisture Contamination of Polyisocyanurate Insulation
Reports have been received of moisture contamination, or signs of moisture contamination of polyisocyanurate insulation on some construction job sites.
Read Online > Download PDF >November 2012
Safety in Roof Design
Work related injuries (WRI) for which workers received compensation have decreased significantly since the late 1980’s.
Read Online > Download PDF >November 2009
Flood Testing
Upon completion of a roof installation, many owners wish to verify the integrity of construction prior to “taking possession”. Some designers and consultants specify that a flood test of the roof be carried out as a means of assuring that the roof has been properly built.
Read Online > Download PDF >May 2008
Blistering and Off-Gassing of Urethane Foam Insulations
In a previous Technical Bulletin (Volume 46 in July 1996), CRCA addressed the phenomenon of blistering vs. built-up roofs.
Read Online > Download PDF >June 2007
Changes to FM Global Loss Prevention Data Sheets
There are few organizations that have attained as much prominence and influence in the roofing industry as FM Global.
Read Online > Download PDF >June 2007
Perimeter Edge Flashing and Wind Resistance
According to the insurance industry’s Institute for Catastrophic Loss Reduction, damage due to hurricanes and other windstorm events has increased dramatically in recent years, incurring losses of life and property around the world.
Read Online > Download PDF >June 2007
Asphalt Durability
Canada’s standard for roofing asphalt, CSA 123.4, categorizes asphalt into three distinct types based on their softening points and penetration (hardness).
Read Online > Download PDF >December 2005
Wood Preservatives In Roofing
Wood elements often form part of the roof assembly. They may be limited to minor components of the system, such as cant strips and wood blocking, or substantial components as in the case of wood decking and joists.
Read Online > Download PDF >June 2004
Metric Steel Decks
Gypsum board and other panel type materials are widely used over steel decks in compact roof systems to provide a level base for the other components or to serve as thermal barriers.
Read Online > Download PDF >June 2003
Equiviscuous Temperatures (EVT)
Since its introduction in late 1977, the concept of EVT has been widely accepted throughout the North American roofing industry as a means of providing an application temperature window and in-the- field quality control.
Read Online > Download PDF >January 1998
Ice on Roofs
In the wake of the recent ice storm that ravaged Eastern Canada, a great deal of concern has been raised regarding the condition of low slope roofs.
Read Online > Download PDF >February 1997
Faced Polyisocyanurate Roof Insulation
There has been extensive debate regarding the long-term or “in-service” Thermal Resistance value of polyisocyanurate insulations.
Read Online > Download PDF >