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My 18 year old timber double hung windows are not staying up. I have replaced the spiral tubes, tensioned both spirals and then screwed the base plate to the window on both sides?

There are different spiral sizes that take different weights. The spiral should have a coloured mark on it to indicate its weight range. You need to check to see if you replaced the old spiral with the same colour spiral, plus you need to check the length is the same size as the old spirals.

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CDK are proud of our highly skilled workforce, exemplified by a number of our staff whose families have worked for us through the generations.

Our workforce is further complimented by our specialist sub-contractors who we have known and worked with for many years.

Bushfire Attack Levels

In the Australian Standards As 3959, they have classified different bushfire intensity levels that a home may experience during a bushfire.

These are referred to as Bushfire Attack Levels, or BAL’s for short.

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