SBS (Styrene-Butadiene-Styrene) membrane is a type of modified bitumen roofing membrane commonly used in the construction industry for waterproofing flat or low-sloped roofs. It is made up of a base sheet typically reinforced with fiberglass or polyester and coated with SBS-modified bitumen.
The term “Mineral Finish” refers to the surfacing or top layer of the SBS membrane. Mineral finishes are commonly added to SBS membranes to provide additional protection and durability. The mineral surface is typically composed of fine granules, such as mineral slate or ceramic-coated granules, which are embedded into the top layer of the membrane.
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The mineral finish serves several purposes:
UV protection: The mineral granules act as a shield against harmful ultraviolet (UV) rays from the sun. UV radiation can cause the bitumen to deteriorate over time, leading to premature aging and failure of the membrane. The mineral surface helps to reflect sunlight and protect the underlying layers.
Enhanced fire resistance: The mineral finish improves the fire resistance of the SBS membrane. The mineral granules are non-combustible and can help prevent the spread of fire on the roof.
Improved aesthetics: The mineral finish gives the SBS membrane a textured appearance, which can enhance the visual appeal of the roof. It is available in various colors, allowing for customization and blending with the overall building design.
Weather resistance: The mineral surface provides an extra layer of protection against weather elements, such as rain, hail, and wind. It helps to prevent water penetration and provides added durability to the roofing system.