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Gaining a clear understanding of the various types of low-slope and flat roof membranes is crucial for efficient maintenance. By distinguishing between these membrane types and comprehending the materials and differences, you can streamline and optimize your maintenance efforts effectively.
TPO: Thermoplastic Olefin TPO membrane is typically white and offers versatility in attachment methods. They can be ballasted, mechanically fastened, or fully adhered, with the latter being the most commonly used. Seam welding ensures a mostly homogeneous membrane, and TPO's thermoplastic properties have made it increasingly popular in recent years.
PVC: Polyvinyl Chloride PVC membrane resembles TPO membranes and also possess thermoplastic characteristics. However, PVC is more flexible and better suited to conforming to substrate changes.
EPDM: Ethylene Propylene Diene Terpolymer is a black synthetic rubber membrane often installed using ballast weight or mechanical attachment. Ballast involves covering the EPDM membrane with stones or concrete pavers to secure the roof insulation and membrane. Mechanical attachment is used when ballast is absent, and wrinkles may appear if the membrane is dragged with the foot.
BUR: Built-Up Roof Bituminous membranes, typically built-up roofs (BUR) or polymer-modified bitumen membranes, are the go-to option when not using single-ply membranes. BUR membranes are applied using hot asphalt or coal tar pitch, often surfaced with bitumen and gravel, mineral-surfaced cap sheets, or liquid-applied roof coatings.
Polymer-Modified Bitumen: Polymer-modified bitumen membranes consist of an unsurfaced base layer adhered to a substrate. Application methods for this membrane type include ht-applied asphalt, cold-applied adhesives, or torch application. Additionally, you can opt for a protective aluminum coating over the cap sheet.
Once you grasp the distinctions among low-slope and flat roof membranes, you can confidently choose the one that best suits your requirements and ensure efficient roofing maintenance. Discuss your options with a Advanced Roofing Technologies expert to determine the ideal membrane for your specific needs.