sydthebeat
Registered User
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You dont have to, but it is a 10 year structural insurance type thing. The builder has to be homebond registered though... they dont accept direct labour builds AFAIK.
Another form of insulation in a cavity I heard of but I don't think it has been done,
Would it be possible to construct the inside leaf leaving wall ties hanging out, then spray on the inslation to the outside of the inner leaf and then construct the outer leaf of block work.
Advantages: increase air tightness.
Disavantages: you would have to construct inner leaf to first floor level, then spray it, place the concrete floor then construct the outer leaf to first floor level. Then construct inner leaf to roof level spray it and then continue the outer leaf to roof level,
Meaning you would have to bring the spray on insulation contractor on site twice to insulate the house.
If you need more info on this system that I have chosen let me know.
abdjc
You seem to promote AMVIC petty well, any reason why??