Roof surfaces bear the brunt of the sun during the day and absorb heat radiation, which in turn gets trapped in the area between the roof and the ceiling and radiates into the space below the ceiling, heating up the spaces where people live, work and play.
“Air-conditioning and heating are two major consumers of electricity, so it is very desirable to reduce the need for both from the point of view of national energy consumption,” says Willem Grové, marketing manager of Coverland. “And with electricity prices on a sharp upward curve, household and business budgets are also coming under strain.”
To limit the heat transfer through roofs, the Coverland Cool Roof is designed to create a natural airflow and heat barrier in order to provide a cool and comfortable home. “It is a sustainable system which saves energy, reduces electricity costs and protects the environment,” notes Grové.
How does it work?
The Cool Roof system utilises technologically advanced materials:
– Beneath the surface, counter battens create larger passageways for air to flow through, while increasing the insulation gap.
– Coverland’s RadenShield membrane is laid on the rafters and fixed by the counter battens. The silver reflective aluminium barrier reflects 97% of the heat that is radiated through the tiles.
– As this hot air rises, open ridges and hips, facilitated by the Coverland Dry Ridge System which eliminates the use of mortar, act as ventilation outlets.
– Coverland FigaRoll Plus is used to seal the ridge and hipline. Its integrated ventilation capability allows heat to escape from the roof.
– In combination with this, the Ridge Tree is used to optimally align the ridge battens for better air flow.
Cool air is drawn in through large inlets at the eaves to cool the space between the roof and the ceiling. In colder or humid climates, this ensures that moisture and stagnant air can escape, preventing the build-up of mould and wood rot. In hotter climates, the release of hot air reduces heat conduction into the roof space and ultimately the home.
“This effectively cools the home by up to 10°C, without using any additional electrical or mechanical parts, thereby reducing electricity usage,”* Grové highlights.
“As a passive system, the Coverland Cool Roof System keeps running the entire day. When the house is cooler, airier and fresher, you use less air-conditioning. Savings are therefore made due to the reduced energy required.”
The CoolRoof® Technology was developed by the BMI Technical Centre in Germany and is widely used in Europe, Malaysia and India.
Tel: 011 22 7300
*Scientifically tested by the BMI Technical Center in Germany, based on a 90m² houses at a regulated temperature of 22°C.
Caption main image:
The RadenShield aluminium membrane is laid on the rafters and fixed by the counter battens.
RadenShield Cool Roof
The Cool Roof system cools interiors by up to 10°C, without the need for additional electrical or mechanical parts, thereby reducing electricity usage.
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