Majestic 40 at Gardener's Ridge

building a Wisdom Majestic in North Kellyville

BAL measures


So the outcome of our Bushfire report we needed for CDC is as we expected and we remain at a rating of BAL12.5 due to being within 100 metres of the bush at Cattai Creek reserve.

Wisdom have raised a variation for the items we require in order to be compliant with the Australian Standard AS 3959-2009 ‘Construction of buildings in bushfire prone land’ and other developmental standards.

 They are also raising an additional variation with items that we would like but that are not compulsory ie. Security screen doors and gutter guards.


The Australian Window Association has also produced a helpful guide to windows and doors in a bushfire prone area:

So in addition to what our builder includes as standard our BAL12.5 requirements are:

  • Weepa Vents & stainless steel spark arrestors to vents & weepholes $865
  • Fire-retardant Merbau door frames to Entry & balcony doors $795
  • Seals to garage door top and sides to prevent entry to embers $520
  • Spark guards to whirlybirds on roof $90
  • Non-combustible sealant and/or sarking to Colourbond roof joints $870

Giving a BAL12.5 compliant measures total of $3140

Additionally we have:

  • upgraded to a Merbau external Front Entry hinged door in lieu of standard $580
  • upgraded to a Merbau external Balcony hinged door in lieu of standard $310
  • Aluminium flyscreens with aluminium flymesh to all openable windows (21) $1050
  • Diamond grill sliding flydoors with .316 Stainless steel flymesh & triple lock to Home Theatre and Laundry $1090
  • Diamond grill stacking flydoors with .316 Stainless steel flymesh & triple lock to Dining & Leisure $2000

This gives us a grand total of $8170 against our provisional allowance of $7K.

We have not gone for gutter guards ($5K) at present as in the meantime our site costs have increased due to the need for a drop edged beam but that’s a story for another time.



A solid dense termite resistant hardwood from SE Asia and Queensland Australia.


I have checked with Wisdom about where they source their supplies from with respect to concerns over illegal logging in SE Asia. Wisdom’s Merbau is sourced overseas and has the relevant certification ( Certisource and SVLK).

The Indonesian Government has agreed to improve its forest management certification system – the Timber Legality Assurance System (SVLK). You can read more about it by following this WWF link:

I have also asked if Wisdom use any of the other bushfire resisting timbers:


Red Ironbark

Red River Gum

Silvertop Ash

Spotted Gum



Author: lunar62

Having lived here as a child in the 60's I fell in love with Australia and always hoped to one day be able to visit again. So when the opportunity came to move here with my husband's job we decided nothing ventured nothing gained and decided to go for it even though it was hard to leave our family and friends behind in the UK. So now we're here lock, stock and barrel, children and pets too and embarking on building a new home.

4 thoughts on “BAL measures

  1. Umm, don’t forget to ask what ongoing maintenance is recommended for your timber items . Our jarrah doors and window frames are probably not as fire-retardant as they used to be ever since I treated them to a few coatings of linseed oil (mixed with mineral turps) when they appeared to be drying out in the sunshine. Not as satisfying a job as steam mopping.


    • Good point!
      I was reading about maintenance of the rain garden as well.
      I feel a house maintenance folder coming on – complete with Dymo labels of course 🙂

  2. Your gutter guard sounds expensive. They’re doing our aluminium gutter guard for $3750 – I would question their quote. Sometimes I think they just make up a number, depending who you get to quote, it could be a completely different amount.

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