Template:Materials - Waterproofing Membranes (PVC)

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:

• Type 2 - reinforced

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.

Click on a manufacturer's name to see the full list of their products accepted for use in the RoofStar Guarantee Program

Manufacturer	Product Name	Nominal Product Thickness (mm)	Approximate Weight (Kg/m2)	Reinforcement Material	Reinforcement Material Weight (g/m2)	Applicator Training
Sika Canada Inc. (Sarnafil)	Sarnafil G476 12	‒	‒	‒	‒	‒
Sika Canada Inc. (Sarnafil)	Sarnafil G476 15	‒	‒	‒	‒	‒
Sika Canada Inc. (Sarnafil)	Sarnafil G476 18	‒	‒	‒	‒	‒
Sika Canada Inc. (Sarnafil)	Sarnafil G476 20	‒	‒	‒	‒	‒