Hong Kong Regulations

BUILDING (CONSTRUCTION) REGULATIONS - REGULATION 14

Chunam

(1) Chunam shall-

   (a)  be composed of cement, hydrated lime, non-organic soil and water to
        form a durable and impermeable material;

   (b)  be applied in 2 layers, each about 20 mm thick, with a well-keyed
        surface to the bottom layer and with lapped daywork joints; and

   (c)  where the surface gradient exceeds 1 in 2, be adequately restrained
        from slipping.

(2) A weep hole, with an internal diameter of not less than 50 mm, shall be
provided to every 1.5 m2 of the face of chunamed surface and in areas of
localized seepage. (Enacted 1990)