Essential properties for a roof – Part 3

  • Resist temperatures from -10⁰C to +80⁰C, and rapid reversals of temperatures of the order of 60⁰C, without deterioration of the roofs essential properties.
  • Resist the effects of standing water on the top surface, and condensation at the under surface.
  • Accumulated hail on roofs after moderate storms must not result in water penetrating the interior of the building

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