Wetroom floor advice please

[Bucks]

We are about to build a wet-room in a garage conversion that we have done over the last 9 months or so.
My main concern is point loading on the floor (as it may be used for a disabled person in the future)

We were planning to use 2" mosaic marble or travertine (hoping that these will be pretty non slip & easier to make a neat job with the falls) we are also planning on putting in underfloor heating.

with the actual construction of the floor we have a pretty blank canvas as it is a concrete slab approx 9" below the surrounding floors, so my plan is to raise it with joists then plywood with whatever tray/ tanking system on top (I was originally thinking of the Marnox tray & boards)

Any advice would be much appreciated as to the best way/materials to construct the floor to avoid point loading
We where also planning on using the marmox tile backer boards for the walls unless anyone has any better alternatives.

PS we are also thinking of a wall hung toilet (if its suitable for a disabled person) to keep a totally clear floor for easier drainage.

THANKS in advance

 

[Jasonb]

I've used the Impey Aquadec tray which is easy to fit particularly as you are adding the timber floor from scratch, its thickness suits 22mm flooring ply perfectly.

I use the RIW Tilesafe membrain on the floor and the first 1m up the walls, depending on teh job I either use Wedi board or Aquapanel.

http://www.tile-safe.co.uk/default.htm

A wall hung pan should be fine, I tend to use the Geberit mounting frames but the Grohe ones are also OK.

Jason

 

[jctilingservices]

generally same info as above, cant go wrong following Jasons info mate

 

[bathstyle]

Marmox do two different types of dec, an extruded foam type and another resin type.

Both work fine with a 2" tile but with reference to the extruded foam type, 2" is a minimum tile size due to point loading.

With regard to the tanking, take a look at what marmox suggests, the last time I did the foam type it didn't require tanking, only at the floor to wall joint.

Personally I would use Kerdi.

Tilesafe membrane is used by many fitters including myself (in the past) but it does have many flaws. It is virtually impossible to fit on a very hot sunny day, the membrane melts and is so sticky it's unworkable. On a very cold day the room needs to be heated otherwise it won't stick to the substrate properly. Also, if used with UFH, the temperature has to be kept at a specific reduced figure otherwise the membrane melts. I never use the stuff anymore.

 

[Bucks]

Thanks Guys for the info, been hectic the last couple of days trying to purchase tiles & a suit while they might be a bit cheaper in the sales & before the vat increase.
Will have a proper look into what you have been recommending when we get back later today especially the dec as we have decided to go for the 2" travertine mosaics on the floor & 450x300 marble with a couple of borders in the travertine mosaics on the walls (all from topps tiles).

Thanks for all you help, its much appreciated

 

[Bucks]

Another question before we rush out again, we are looking at a resin tray rather than compressed foam, due to the point load issues.
Can you lay underfloor heating over the resin shower trays?

We are possibly looking at the Marmox 1200x1200 showerstone, unless anyone knows where we could get a larger one? the room is 1.6m x 1.8m we are not putting a screen up (hence as large a showertray as possible) at worst if we realy have to we will have to maybe put a shower rail & curtain up.

 

[Bucks]

We have decided to go for the Marmox showerstone tray, What would be the best alternative to plywood to fill in around the tray, we are not wanting to use the foam type boards (due to point load issues again)
we are going to be covering the whole floor inc tray with UFH also what would be the best tanking for the floor?

I was planning to just use ply & tank with the rubber tilesafe & then use the Devimat 100 UFH, but if we can get a replacement for the ply & tilesafe we would prefer to use the Devimat 150 (which is to hot for timber & the tilesafe)

Any help & advice would be much appreciated.