The gap will be siliconed in

I will assume that your builder and installer know what they are doing and this door is not fully exposed. All drainage systems use a water head to balance the pressure exerted on the window by wind pressure to keep rainwater out. The higher the pressure the window sees, the higher the height of the water head required. So drainage depends on sill depth to maintain watertightness, for example commercial doors need a subsill to develop a greater water head for the greater wind pressures on high buildings.

The waterhead built into a door (or window), the height of the water in the tracks and drainage system, has been developed to keep rain out at a particular pressure. If this is defeated by elevating the outside without allowing for waterhead, then the door will likely leak.

Ed

It's designed for flush mount, but there is a another plate/sill under for drainage. According to specs, its water resistance only rated to 600Pa (AS2047) in such an installation (link in one of the previous post; actually after looking at the under sill design, I think we have the 702, not the 704); is that sufficient for an exposed area?

We will actually be having it under cover, but will likely hose out the deck at times (being tiled).

Hi

I checked your link. The data say it will be fine with the subsill.

http://www.awscommercial.com.au/product ... d_user.pdf

That's good; from you comment, I thought I would have to go back to the solicitors as the requirement was specified in the contract, and if it did not fulfil requirement, redress would be sought.

Thanks for pics PHL. They are great, just what I was looking for. Also thanks for your advice ED regarding the drainage. The stacker will definately be under cover.