Template:Materials - Waterproofing Membranes (Butyl)
Template:Materials - Waterproofing Membranes (Butyl)
- 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."
| Manufacturer | Product Name | Nominal Product Thickness (mm) | Approximate Weight (Kg/m2) | Reinforcement Material | Reinforcement Material Weight (g/m2) | Applicator Training |
|---|---|---|---|---|---|---|
| Carlisle Syntec Systems Canada | CCW Butyl Membrane Waterproofing | ‒ | ‒ | ‒ | ‒ |