Wet floor former

[Kuly]

Hi,
Long time since I have done any DIY and tiling. 15 years I would say. Better half getting annoyed and the shower broke in so......
After having removed my old bathroom out and lifted the chip board flooring and cleaned all the glue from joists I am thinking of installing a wet room! Have ordered the 25mm ply for the new floor and now just thinking of the floor former.

I am looking at either the AKW Tuff or the Impey Easy Fit with the Dural WP membrane for tanking.

I have a few questions if anyone could please help:
1) Which is better, the Impey or AKW?
2) How do I level the floor former with the floor as the formers are 22mm and the floor is 25mm?
3) Is Impey water guard better than the Dural?
4) I have paramount plaster board against one wall of the shower, do I have to take into account the weight of the tanking before choosing tiles? Will he impey be lighter than the dural and be better for me in this case?
5) Any better wet room options available for a DIY'er

Bearing in mind this is upstairs I am planning on tanking all around the bathroom just to be safe. Any advice on what to do where I have to screw the pan and bath to the floor? Do I have to screw the bath to the floor if I have wall anchors?

Many thanks in advance.
Kuly

 

[White Room]

Never fitted an Impey but the Tuff 2 shower tray as it says is tough, so probably be my choice....

 

[tilerbarry]

Mapei do 2 sizes and wedi do many sizes, Mapegum WPS and Mapeband tape on joints and corners for tanking. I use this system on all my wetroom jobs.

 

[thompsonbrown]

Used impey for the last ten years and think there great.
Impey Easy Fit has a wider range of drain positioning, helpfull with floor joists.
height of tray could be raised by ply under the tray.
Your 4th point about tanking the walls, use a waterproofing kit like bal wp1. Dont use impey tanking for walls.