Difference between revisions of "Waterproofing Materials"
Difference between revisions of "Waterproofing Materials"
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<big><big><big>General</big></big></big> | <big><big><big>General</big></big></big> | ||
Revision as of 21:07, 22 August 2016
General
A combination of technological and economic factors has brought about the increased popularity of flexible membrane roofing systems. As building and construction technology become more sophisticated, the demands on the roofing membrane become more severe. Large, highly insulated roof areas impose greater stresses on the membrane. Formerly expensive synthetic materials have become more cost competitive as the cost of petroleum products has increased.
Bituminous and Modified Bituminous
| NOTE: Read the RoofStar Guarantee Standards for SBS Membrane Roof Systems and an Introduction to SBS Membranes |
Bituminous and modified bituminous membrane systems have the benefit of offering the physical properties of a flexible membrane while retaining the practical advantages of bituminous materials. Roofers tend to have a certain “familiarity” with the product and they can be used in conjunction with some traditional products and methods. This may prove especially advantageous in re-roofing over surfaces contaminated with bitumen.
Thermoset (Elastomeric)
| NOTE: Read the RoofStar Guarantee Standards for EPDM (Thermoset Membranes) Roof Systems |
Thermoset flexible membrane systems are synthetic materials in which polymers chemically and irreversibly cross-link. This process is known as “curing” or “vulcanizing”. They may be manufactured in cured or uncured form. Once cured, the material cannot be bonded to itself except by using an adhesive and / or seaming tape. (See Manufacturer application standards)
Thermoplastic (Plastomeric)
| NOTE: Read the RoofStar Guarantee Standards for TPO, PVC (Thermoplastic Membranes) Roof Systems |
Thermoplastic flexible membrane systems are synthetic materials in which cross-linking of the polymers does not occur. The membrane can be welded together by the use of solvents or heat. This process is repetitive and new welds may be formed at a later time. The strength of these welds often surpasses that of the base membrane.