Coverland tile properties
PHYSICAL AND CHEMICAL PROPERTIES
Coverland concrete roof tiles are produced by a high pressure extrusion and compression process which imparts the following properties to the product:
STRENGTH
Coverland concrete roof tiles comply with the strength requirements of SANS 542/1990
IMPACT STRENGTH
Coverland concrete roof tiles can withstand the impact of a 45mm hailstone.
DIMENSIONAL TOLERANCES
Coverland concrete roof tiles comply with the dimensional tolerances of SANS 542/1990.
WATER IMPERMEABILITY
Stringent continuous testing (totally immersed in water for 24 hours), shows a low level of absorption (max 5% of tile mass). These test conditions exceed actual roof conditions where the tiles receive water on one side only.
INSULATION
Coverland concrete roof tiles have excellent insulation properties – they retard heat penetration in summer and retain the warmth in winter.
Coverland concrete roof tiles are also highly effective sound insulators.
THERMAL PROPERTIES
Thermal conductivity: 1,4 W m-1 K-1
Thermal transmission U value: downward heat flow = 4,116 W m-2 K-1
FROST: Coverland concrete roof tiles are unaffected by frost.
ULTRAVIOLET RADIATION: Coverland concrete roof tiles are unaffected by intense ultraviolet radiation.
FIRE RESISTANT
Coverland concrete roof tiles are non-combustible when tested to BS 476 Part 4:1984.
Classified SAA when tested in accordance with BS 476 Part 3 1975 with respect to fire penetration and spread of flame.
MAINTENANCE
Coverland concrete roof tiles are maintenance-free.