10Polycarbonate roofs above enclosed spaces

10 Polycarbonate roofs above enclosed spaces

10 Polycarbonate roofs above enclosed spaces

(1) A new polycarbonate roof above an enclosed space in climate zone 8 must be double-layered.

(2) If the total area of all new polycarbonate roofs above an enclosed space is at least 2m2, a new polycarbonate roof above an enclosed space must—

(a) for climate zone 2, 4, 5 or 6—have a shading coefficient of less than 0.4 or external shading, and

(b) for climate zone 7—be double-layered.

(3) Subsection (2) does not apply to the smallest new polycarbonate roof with an area of less than 1m2.