A loose- laid ballasted roof is generally used with

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A loose-laid ballasted roof is most commonly used with a single-ply membrane. This is because single-ply membranes can be easily damaged and need protection from the elements. The ballast provides protection from wind uplift, temperature fluctuations, and UV radiation. Modified bitumen membranes and built-up roofs are generally not used with a loose-laid ballasted system because they are already sufficiently protected by their own layers and surfacings.

A Loose- Laid Ballasted Roof Is Generally Used with