A
protected membrane roof can be defined as a recreational roof or a ballasted/inverted roof. In recent years emphasis has been placed on green roofs, which falls in the same category.
From a waterproofing perspective, there are certain advantages to these forms of roofing:
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Protection from the effects of the sun and wind
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Protection from mechanical damage
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Improved fire protection
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Protects the building against the effects of rapid temperature changes
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Requires no mechanical fixing in the main roof area
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No penetration of the vapour control layer
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Improved acoustic performance
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Provides more natural landscape
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Freedom of aesthetic design
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Provides additional usable space on the roof