| To view materials in any section listed below, click on the EXPAND button located at the right hand side of this page
|
1 Vapour Retarders
The RCABC does not specify Vapour Retarders, as they are not included in the RoofStar Guarantee Program. See manufacturer specifications where Vapour Retarders are required, and refer to proprietary products and installation instructions. This cross-reference is listed for information only.
2 Deck Overlay Boards
Extruded expanded polystyrene (Type 4), conforming to CAN/ULC-S701 (latest edition) with a compressive strength of 240 kPa (35psi) is the only commercially produced insulation suitable for use over waterproofing and protected membrane roofing systems. Extruded expanded polystyrene is available in a 600mm x 1200mm (2'x4') board size, has an aged R value of 5.0 per inch (RSI 0.87) and ranges in thickness' from 25mm (1") to 100mm (4").
Expand
4 Insulation Overlay Boards
5 Insulation Joint Tape
RGC specifically accepted waterproofing membrane systems listed in the Accepted Materials of this Manual include the following:
- Two Ply SBS Modified Bituminous Membranes
- Butyl Elastomeric Single Ply Membranes
- Poly Vinyl Chloride (PVC) Plastomeric Single Ply Membranes
- Hot Fluid - Applied, Rubberized Asphalt Systems.
Only waterproofing membrane systems that are fully adhered and have an accepted protection layer installed above the membrane (protected) qualifies for coverage under the RoofStar Guarantee Program.
All waterproofing system accessory components must be supplied or be accepted for use by the membrane manufacturer.
- Modified Bituminous (SBS) Membranes
Expand
- SBS (Styrene Butadiene Styrene) Modified Bituminous sheet waterproofing is prefabricated elastomeric membranes that are reinforced with mats consisting of polyester, fibreglass or a combination of both reinforcement types. SBS modified bituminous membranes are available in varied thicknesses with specific physical properties to satisfy the demands of particual waterproofing conditions as well as surface finishes that facilitate various application methods.
- Composition
- Bituminous and modified bituminous flexible membrane systems are composite sheet membranes which are thermoplastic in nature but display variable elastomeric properties when modified. These sheets generally consist of bitumen (oxidized or modified), reinforcement, and surfacing materials. The performance of these membranes may be compromised by subtle, seemingly inconsequential changes in composition.
- The formulation of the bitumen is critical, particularly when its physical properties are modified by the addition of polymers. Bitumen is most commonly modified with styrene butadiene styrene (SBS). The manufacturer must ensure that a suitable degree of compatibility exists between the bitumen and the polymer and that a thorough mix has been obtained. The careful selection and combination of bitumen and polymer (the type of modifier, the percentage of polymer used, etc.) determines the physical properties and long term performance of the modified bituminous "binder". The binder provides the membrane with its waterproofing capability and may impart the following properties:
- low temperature flexibility
- elasticity
- high temperature resistance to flow
- resistance to aging
- The bitumen utilized for oxidized bituminous membranes has been "blown", similar to roofing asphalt. This produces a higher softening point and, therefore, a more useful temperature range.
- The physical properties of the binder are further enhanced by the imposition by saturation or coating onto a carrier or reinforcing mat, most commonly a textile such as:
- non-woven spun-bonded polyester
- woven polyester scrim
- fibreglass mats
- woven fibreglass cloth
- combinations of the above.
- 1. Base Membranes
- 2. Cap Membranes
- 3. Self-adhering Membranes
Click on a manufacturer's name to see the full list of their products accepted for use in the RoofStar Guarantee Program
| Soprema Inc. |
Sopralene Flam Stick |
‒ |
‒ |
‒ |
‒ |
‒
|
- Thermoset Membranes (PVC)
Expand
- Thermoplastic materials are defined as polymers which soften when heated and harden when cooled. This process is repetitive provided the material is not heated above the point at which decomposition occurs. No cross-linking or vulcanization occurs. In addition to heat welding, some materials can be solvent welded. These welds develop bonding strengths equalling or surpassing the strength of the base materials. Thermoplastic membrane systems that comply RGC Guarantee Standards, are installed as fully adhered protected waterproofing assembly, qualify for coverage under the RoofStar Guarantee Program.
- Composition
- Thermoplastic materials used for waterproofing decks on plazas, promenades and terraces in the RoofStar Guarantee Program include only PVC (Polyvinyl Chloride) Membranes:
- PVC is a thermoplastic material produced through the polymerization of vinyl chloride, resulting in a relatively hard, resinous material. This material is then formulated with compounds, such as plasticizers and stabilizers, depending on the physical properties required for end use. PVC formulations have been developed to suit numerous commercial and industrial applications.
- PVC waterproofing systems are single-ply membranes reinforced with polyester fabric or glass fibres, and in thicknesses usually ranging from 1.2 mm to 2.0 mm, depending on the manufacturer. The membrane is fully adhered and Seams are heat or chemically welded (see manufacturer's requirements).
- PVC membrane should conform to CGSB 37-GP-54M 1979, "Roofing and Waterproofing Membrane, Sheet Applied, Flexible, Polyvinyl Chloride" which lists two types of membrane, according to manufacture:
- and four classes, according to end use::* Class A - non-exposed roofing
- Class B - exposed roofing
- Class C - waterproofing
- Class D - flashing membrane asphalt compatible
- This standard covers requirements such as "thickness, lap joint strength, permeability, tensile strength, elongation at break, low temperature flexibility, water absorption, resistance to accelerated weathering, dimensional change after stress relaxation, and cone penetration"
- PVC membranes should be applied in conformance with CGSB 37-GP-55M 1979, "Application of Sheet Applied Flexible Polyvinyl Chloride Roof Membrane" and the membrane manufacturer's printed instructions.
- Thermoplastic Membranes (Butyl)
Expand
- Thermoset is defined as a material that solidifies or "sets" irreversibly when heated (vulcanized). This property is usually associated with cross-linking of the molecules induced by heat or radiation. Once the material is cured, it can only be bonded to itself by adhesives; new molecular linkages cannot form. Some thermosets are not cured during manufacture (ie. Butyl flashings) and are intended to cure over time after they have been installed. This allows the material to cure into the specific shape required for waterproofing application details.
- Composition
- The generic membrane types defined as cured thermosets in the RoofStar Guarantee Program for Waterproofing currently include Butyl Membranes (Isobutylene and Isoprene):
- Butyl (Isobutylene - Isoprene) membrane is a thermoset vulcanized elastomer synthetic rubber membrane formulated from isobutylene and Isoprene. Although most commonly available as a cured sheet, butyl can be formulated as an uncured membrane for specific purposes (i.e., flashings).
- Butyl membrane waterproofing systems are single-ply membranes in 1.5 mm (0.060") and greater thicknesses and are usually black in colour. The membrane is applied fully-adhered and seams are joined with contact splicing cement or seaming tape (or a combination of both), and are caulked (see manufacturer's requirements).
- Butyl membranes should conform to CGSB 37-GP-52M 1984, "Roofing and Waterproofing Membrane, Sheet Applied, Elastomeric" which lists two Classes of Type 2 reinforced membranes (classed according to their end-use), according to manufacture:
- Class A - exposed
- Class B - non-exposed
- This standard covers requirements such as "thickness, tensile strength, breaking strength, lap joint strength, elongation, tensile set, low temperature flexibility, water absorption, dimensional stability after water absorption, heat aging, ozone resistance, resistance to accelerated weathering, dynamic impact test, tear resistance, and tearing strength."
- Hot Fluid-Applied, Rubberized Asphalt Membrane
Expand
- These are fully adhered waterproofing system that utilize hot applied rubberized asphalt compounds, with reinforcement scrims, to form monolithic (seamless) flexible waterproofing membranes.
- Composition
- Single component rubberized asphalt compound installed with reinforcement between two a two layer system. Hot applied rubberized asphalt is fully- adhered to both vertical and horizontal structural surfaces to form monolithic (seamless) flexible waterproofing membrane. Reinforced membrane flashings are installed in Hot applied rubberized asphalt at all deck transitions (wall to deck etc.).
- Hot applied rubberized asphalt systems are used for waterproofing on the following applications:
- Waterproofing in an Inverted Assembly
- Split Slab Construction for Plaza Decks
- Terraces, Prominades & Planters
- A RoofStar-accepted membrane protection layer (asphalt core board, cap sheet or protection mat), must be installed by the waterproofing contractor, and be compatible with waterproofing membrane. The protection layer shall be installed and secured, as soon as possible, upon completion of waterproofing membrane installation. Construction traffic, by other than waterproofing trade and membrane moisture monitor technicians, is not permitted until the membrane protection layer is completely installed and secured.
Expand
8 Accessories
- A membrane moisture scan survey and report that confirms the water tight integrity of waterproofing systems is a mandatory requirement of the RoofStar Guarantee Program for all waterproofing systems, prior to installation of overburdens or wearing courses. Membrane moisture survey scans must be performed by an independent moisture detection company, whose moisture detection system has been reviewed by the RCABC Technical Committee and deemed to be suitable for inclusion in the RoofStar Guarantee Program (Waterproofing). In addition, moisture monitoring sensor grids (conductance scanning grid) are mandatory and shall be installed on the top surface of all waterproofing membrane systems designed with inaccessible overburdens and wearing courses. The exceptions that do not require moisture monitoring sensor grids are pavers on pedestals and gravel ballast to a maximum 100mm (4") thick . Moisture monitoring sensor grids shall be installed prior to installation of overburdens or wearing courses and may be placed over protection boards or SBS membranes that have been set in hot fluid-applied modified asphalt.
Expand
Click on a manufacturer's name to see the full list of their products accepted for use in the RoofStar Guarantee Program
| Manufacturer
|
Product & Service
|
Recognized Applications
|
| Detec Systems Ltd. |
Integrity Scans, Static and Monitored Electronic Leak Detection systems |
PMR, MPMR, Waterproofing (Grade-level)
|
| International Leak Detection (ILD) |
Integrity Scans, Static and Monitored Electronic Leak Detection systems |
PMR, MPMR, Waterproofing (Grade-level)
|
| SMT: Structure Monitoring Technology |
Integrity Scans, Static and Monitored Electronic Leak Detection systems |
PMR, MPMR, Waterproofing (Grade-level)
|
Waterproofing Plazas, Promenades and Terraces
Accepted Materials
Special Applications
