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Deck height in relation to termite barrier

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Hi There,
I am planning on building a low deck in an area surrounded on 3 sides by external walls of my house. The walls are brick veneer with the usual termite barrier two bricks up form the footings.
My question relates to the finished height of the deck in relation to the termite barrier. The deck wont be attached to the house (no ledger r any fixings) and there will be a 30-40mm gap between the edges of the deck and the walls. The doorway out on to the deck has a finished step about 30-40mm above the termite barrier. Ideally I want the decks finished height to be level with the doorway step but I am unclear of the regulations around this and I cant find them anywhere.
Thanks for you advice.
Cheers,
Cameron