Insulation is the solution for homeowners who are desperately looking for ways to improve the energy efficiency of their homes. This month Bradley Hirst, technical services manager at Knauf Insulation, explains why installing ceiling insulation ensures maximum savings on energy bills.

Maximise performance

Under the building regulations, roofs and ceilings must achieve a minimum thermal resistance total R-value of 3,7 according to a property’s relative energy zone.

The thicker the insulation, the more effective it will be at preventing heat transfer.

Start at the eaves

Always start at the eaves and work towards the ceiling hatch. Ensure your insulation is slightly wider than the joist to ensure a tight fit and the same depth (i.e., if the joist is 100mm deep the insulation should be too).

Position the end of your insulation between the joists and curve it up at the edge of the ceiling. Always leave a 50mm gap between the top of your ceiling insulation and the roof to ensure air movement and prevent condensation.

Make sure the ends of the insulation are butted together so there are no gaps that can reduce the performance.

Some appliances and fittings, such as recessed downlights and heater flues, require free space around them for the dissipation of heat, to reduce the fire hazard. Allow clearance around appliances and fittings or within 25mm of recessed light fittings.

Electrical wiring must be appropriately installed and should not be covered by insulation, to prevent it from overheating. Knauf Insulation is A1 Fire Rated and meets all regulatory compliance in South Africa.

For more information, contact Knauf Insulation:
Tel: +27 74 512 7817

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