For floors - mostly ceramic tiles...

It needs to be flexible as the tiles are sitting on Marmox which is slightly
flexible.

I'm sorted on the adhesive - Mapei Kerabond + Isolastic - I tried some, then
tried to break it up and it held together like a b*stard.

Another complication with the grout, which I don't fully appreciate yet is
I'd like something that's either available in various very basic colours,
or can have colour added. I suspect we will need some in a light beigy or a
very pale colour and some in a darker grey based on tile choices so far.

How does one go about this?

Ta

Tim

Tim S wrote:
For floors - mostly ceramic tiles...

It needs to be flexible as the tiles are sitting on Marmox which is slightly
flexible.

Then rip them up and make it rigid. Tiles will NOT survive more than a
mm of flexure or so.

The Natural Philosopher wibbled:

Tim S wrote:
For floors - mostly ceramic tiles...

It needs to be flexible as the tiles are sitting on Marmox which is
slightly flexible.

Then rip them up and make it rigid. Tiles will NOT survive more than a
mm of flexure or so.

I don't expect a mm of flexure. But I do expect to need a flexible grout.

Cheers

Tim

Tim S wrote:

I'm sorted on the adhesive - Mapei Kerabond + Isolastic - I tried some, then
tried to break it up and it held together like a b*stard.

Hi Tim - looks like we're doing much the same but you're a couple of
steps ahead of me :-). I have a shed full of marmox, and a batch of
tiles at the local shop waiting for me to ok the delivery (no space to
store them here) but haven't properly looked into adhesive/grout/etc.

It's good to hear of your successful test with the kerabond & isolastic
- was there anything else that seemed like a possible alternative?

How are you planning to fix the marmox down? (I'm doing both walls and
floor)

Any pointers to a good/cheap supplier?

Cheers,

Pete

Pete Verdon d wibbled:

Tim S wrote:

I'm sorted on the adhesive - Mapei Kerabond + Isolastic - I tried some,
then tried to break it up and it held together like a b*stard.

Hi Tim - looks like we're doing much the same but you're a couple of
steps ahead of me :-). I have a shed full of marmox, and a batch of
tiles at the local shop waiting for me to ok the delivery (no space to
store them here) but haven't properly looked into adhesive/grout/etc.

It's good to hear of your successful test with the kerabond & isolastic
- was there anything else that seemed like a possible alternative?

Actually my test was on an expanded polystyrene floor heating panel, 25mm or
so thick (www.floorheater.co.uk).

Mapei Kerabond + Isolastic was the recommended for this application. My
tests indicated that cheap "quarry" tiles (6mm or so thick, 10x10cm) would
survive me jumping up and down on them - but a heavy impact load (belting
hard with a rubber mallet) would crack the tiles.

Based on that, and the clear fact that Marmox has way more surface rigidity,
I feel quite happy with the Marmox - it's going to take a hell of a whack
to crack the tiles, and you could crack a tile on concrete if you try hard
enough.

How are you planning to fix the marmox down? (I'm doing both walls and
floor)

On a dodgey floor, good screed but no DPM, I used Mapei Keraquick on advice
from Mapei Technical. They couldn't guarantee it for 30 years (their words)
but they thought it had the best chance of survival against damp. That was
good enough for me.

On good floors with damp resistance I will either use the same or perhaps
something slightly cheaper.

Any pointers to a good/cheap supplier?

Screwfix for Keraquick, but I've since found www.lilleytileandstone.co.uk
stock it (and much of the Mapei range) rather more cheaply.

Cheers,

Pete

BTW - cut Marmox like plasterboard - score with a stanley knife, snap and
cut the back. Very quick and fairly non messy. But lots of blades - it eats
blades

One thing I would add Pete:

For the bathroom, I thought it best to give Marmox a call regarding loadings
of the bath and loo.

Their recommendation was not to sit the bath on Marmox as it would be using
up a fair fraction of the max compressive loading.

The suggestion was to leave cutouts in the mamrox for the feet and use
either plywood packing to the same depth (their suggestion) or fill the
cutout and level off with screed (my suggestion that met with their
approval) so that load pads were formed for the bath feet.

Although the loo is potentially a much lower loading, they suggested doing
the same there just to be on the safe side...

Cheers

Tim

On 30 July, 22:10, Tim S wrote:
For floors - mostly ceramic tiles...

It needs to be flexible as the tiles are sitting on Marmox which is slightly
flexible.

I'm sorted on the adhesive - Mapei Kerabond + Isolastic - I tried some, then
tried to break it up and it held together like a b*stard.

Another complication with the grout, which I don't fully appreciate yet is
I'd like something that's either available in various very basic colours,
or can have colour added. I suspect we will need some in a light beigy or a
very pale colour and some in a darker grey based on tile choices so far.

How does one go about this?

Ta

Tim

May as well stick with Mapei and the Ultracolour - as much colour
choice as you could ask for, with matching silicones for the expansion
gaps.

Bolted wibbled:

May as well stick with Mapei and the Ultracolour - as much colour
choice as you could ask for, with matching silicones for the expansion
gaps.

Thanks for the pointer - spot on as always

The matching silicones will be handy too.

Now I've read the datasheet I also notice that Keracolour FF + Fugolastic
additive has the same flexural strength - so that's a second option
depending on availability.

Thanks!

Tim

In article ,
Tim S wrote:
Another complication with the grout, which I don't fully appreciate yet
is I'd like something that's either available in various very basic
colours, or can have colour added. I suspect we will need some in a
light beigy or a very pale colour and some in a darker grey based on
tile choices so far.

Dunno about flexible grout - but adding some emulsion paint colours
ordinary ones. Just make sure you make up enough for one job as it's
difficult to match later. And you only need a few drops of it.

--
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Dave Plowman London SW
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