Insulation and Roof Ventilators – A Great Team Effort

Insulation has long been known to control extremes of heat and cold, particularly in the ceiling space of a building. The best quality insulation material can stop up to 70% of the heat transfer through the ceiling, making it an excellent choice to increase the comfort of the building’s occupants. Couple this with the energy savings generated by not needing air conditioners or heaters to be running as often and insulation becomes a very cost effective way of improving overall comfort.

However, even the best quality insulation needs some help, especially in a typical summer when temperatures regularly top 35°C and more. On these days, heat builds up in the ceiling over time, reducing the effectiveness of the insulation which in this situation, is trying to cope with ceiling temperatures over 70°C. Instead of leaving it all up to the insulation, what is needed is a method to remove this overheated air and draw in cooler air from outside.

Wind Powered Roof Ventilators Improve Insulation Efficiency

Roof ventilators work in conjunction with the insulation to cool a building, whether it is commercial premises or the family home. This type of ventilator is wind powered, and works by the exhaust forces created when the breeze turns the turbine. The PJ Group have had many years of experience installing both insulation and roof ventilators, and their clients are always surprised by their increased comfort levels and reduced power bills when they have both systems working together.

For those building owners who would prefer a steady and predictable flow rate of air inside the ceiling space, there is also available a mechanical ventilator. Either solar powered or electric, this unit runs at an extremely low operating cost (around $10 for a whole year). It continues to work, removing hot air and replacing it with cooler air from outside, regardless of whether or not there is a breeze blowing.

Roof Ventilators Suitable for both Metal and Tiled Roofs

Roof ventilators can be installed in both metal and expert tile roofing and for a roof that is a standard rectangular shape, one ventilator unit per 10 squares (90m2) is sufficient. Other additional benefits include removing damp air from the ceiling space in winter, which can compromise the building structure over time, and the decreased heat load on ceiling ducted air conditioning.

There are a number of factors to be considered when choosing the right combination of insulation and ventilators including location, aspect, the number and positioning of windows and others. A miscalculation at this point could cause the end result to be disappointing and incur extra costs in rectification. Identifying the best combination is a job for experts and the qualified tradespeople at the PJ Group can assist with this.

They use only the best quality materials and offer their customers the convenience of an online quote system. Visit their website at for more information.