| Notice to the Reader:
The information published in the RCABC Roofing Practices Manual and offered below does NOT represent a complete set of the manufacturer’s data or specifications, nor is this material recommended or endorsed by the Guarantor. The preparation of a detailed specification is the responsibility of the Design Authority.
|
Manufacturer and Acceptance
- Manufacturer
- https://www.garlandcanada.com/
- Accepted for the RoofStar Guarantee Program
- October 2020
- Accepted for application in
- Waterproofing Systems (roofs)
- Product Summary
- OptiMax membranes
- are fiberglass reinforced asphalt-based membranes modified with a specially-designed polyurethane resin designed to extend roof longevity.
- manufactured to be puncture and fatigue resistant, and are designed to be the waterproofing and reinforcement layer in a modified bitumen roofing system.
- designed for use as the top component in a roofing system where superior performance is required.
- can be used in conjunction with Garland modified base sheets depending on the adhesive used.
- can be used as the top ply in a two-ply flashing system.
- Specifications are available for either hot- or cold-applied two-ply systems.
- (adapted from the Technical Data Sheet)
|
| Notice and Disclaimer: Technical Data Sheets
Bituminous roofing membranes are governed by RGC Acceptance Criteria RGC ACWP-MOD (applicable to membranes accepted after July 1, 2023). The CSA Standard for these membranes, CSA A123.23 "Product specification for polymer modified
bitumen sheet, prefabricated and reinforced", forms the backbone of the RGC Acceptance Criteria and has replaced the older CGSB Standard CGSB 37-GP-56M, which was withdrawn in 2015.
The "British Columbia Building Code" (2024) references the CSA A123.23 Standard in both Part 5 and Part 9 of Division B. The Standard is also published in the National Building Code of Canada (2020), and the City of Vancouver Building Bylaw (2024).
Not all manufacturers of SBS and APP polymer-modified membranes publish technical data sheets that fully align with the CSA Standard. Therefore, the reader must verify this information independently of the RGC, to the reader's own satisfaction. Consult the local manufacturer's representative through the "Find a Member" page on the RCABC association website.
Click the link below for the latest Technical Data Sheet supplied to the RGC by the manufacturer.
- †TBA - To Be Added (This data is contained in archival material and eventually will be added to this page).
|
- Click below for the Technical Data Sheet.
Back to Accepted Materials
Home
