Bathroom refit

[Edinaberdeen]

Hi, I am planning to renovate my bathroom and I am after any tips or guidance.
I know its going to be a big job but I am looking forward to giving most things a try though I will get someone to do some parts. The plan is to strip the lathe and plaster back to the stud/rafters and change sink, toilet and bath with shower screen.
Its going to have travertine tile on the floor and ceramic on all of the walls. I would also like electric underfloor heating.
I have the sink, toilet, bath with screen, taps and tiles. I am going to reuse current shower attachment which is mains pressure from a combi boiler.
The roof above the bath follows the rafters on a 45 degree slope, its about 2x1m.
I am planning hardiebacker 500 on the wall with the sloping roof and the ajoining wall around the bath which also has the toilet. Also thinking about homelux membrane over the hardiebacker in the shower area. Gyproc MR on the other walls and ceiling.
The floorboards seem solid so far (still mostly covered with laminate)but aren't perfectly flat.
I see my options being sand the boards down a bit, lay thin ply or take the boards up and lay 22mm ply.
Then 10mm Marmox insulation board and underfloor heating before tiling with 457mm sq 12mm travertine.
After speaking to Marmox they suggested I could use it around the bath instead of hardiebacker.
Is this a good idea with for hanging 36x27 9mm ceramic tiles on a 45 degree slope?
The tiles are about 16kg /m2 which is well below the 60 kg /m2 limit
Thanks Ed

 

[Sean SML Tiling]

On all my stone bathrooms I don't use anything else other than the marmox boards. No need to use a backer board and then tank when you can use a waterproof board straight onto the studwork.

 

[Sean SML Tiling]

Also with the underfloor heating I would use an uncoupling membrane over the wires to stop the stone from cracking.

 

[Just Rizzle]

why u wanting to use travertine on the floor its such a rubbish product an alternative would be crème jura limestone same look but far better stone
also if you use decoupling matting you must have all your ufh wires covered by a sutable leverling compo

 

[Edinaberdeen]

Thanks for the help, I am looking at getting Durabase CI.

We have travertine because it looked nice in the shop, been acumulating bits over the past few months.

The bathroom is a little under 6 m2 including bath, so around 5 m2 of floor to tile.

22mm ply
10mm marmox
5mm slc with ufh
C2 adhesive
3mm Decoupling membrane
flexible adhesive
12mm travertine tile

60mm total?

If I wanted to reduce the height to maybe 50mm would it be better to:

Use 18mm instead of 22mm ply with noggins every 300mm
6mm marmox instead of 10mm

or get something like ditra eheat instead?

Thanks Ed

 

[Dan]

Have you had a word with @Uheat - Keith ?

www.uheat.co.uk - mention the forum you might get a discount.

But see what they can get for you.

A decoupling membrane wont be needed on a floor that's 2x1m - am I reading that size right in the first post?

 

[Edinaberdeen]

Hi, Dan I could have been more clear.
The bathroom is 2m by 3.3m under the dormer and 2.4 under the slopeing roof.

The 2x1m section I was asking about is the size of the 45degree inverted sloping roof panel that I am concerned about tiling onto.

I will look into uheat thanks.