YANDINA'S Thomas Matyas has shredded hundreds of dollars off his electricity bill this summer.
And his solution for keeping the bill low by only using his air-conditioner three times during the heat waves is so simple, anyone could try it.
All Mr Matyas did was consider basic scientific principles and painted the roof of his house white.
"I was a spray painter originally and the first thing we learnt with spray painting back in the 60s was to paint the roofs of cars white.
"I started thinking a few months ago, it is so hot, why do I have a silver roof.
"It gets so hot on a sunny day, you can't put your hand on it."
So he bought some paint and painted his roof white and the result has been remarkable.
"The house has been so much cooler I don't have to put the air-con on much at all," he said.
And with south east Queensland finally through the hottest summer on record, his idea is gaining merit.
Sunshine Coast Environment Council's Narelle McCarthy said it was time governments and the housing industry looked at "passive solutions" to cooling homes.
Ms McCarthy said the white paint, or reflective light paint or tiles wasn't a new concept.
Yet the Coast had been "lagging behind in passive design sustainability".
"The industry needs to step up to more innovative designs as well as having this supported by government standards," she said.
"It is long overdue for us to be looking to improve the (building) code to support better outcomes."