My Wife has decided on a feature wall in the bedroom in modular slate.

The substrate is plasterboard, A 6mm bed and 10mm tile just about takes me to the weight limit for plasterboard. Should I use a smaller bed say 3mm which will take the weight down to 31kg, would this be safer?
Don't want one of those 60 x 40 ...... on my head in the night lol!

I want to use Mapei Keraflex addy..Normally I would have just slapped it up so to speak but since finding this site it makes sense to ask.

Is it plasterboard or skimmed plasterboard ?

Either way SR, I wouldn't like to be border line above my bed

What / how is the plasterboard fixed to, any chance of overboarding with hardie-backer, to be on the safe side ??

It's just plasterboard no skim, dry lined dot and dab, fixing hardibacker boards would be a bit of a nightmare..

Either way SR, I wouldn't like to be border line above my bed

Do you think she's trying to get rid of me

Working on your calculations you would be within the limits. Not sure what you mean about 3mm adhesive though...you would be using a trowel size of about 8mm for that sort of tile and depending on the calibration of the slate and your requirements you would go above that.
I would go for a tile backer board personally

You could use one of the lightweight adhesives which would lose a bit of weight.

Originally Posted by Sir Ramic

Working on your calculations you would be within the limits. Not sure what you mean about 3mm adhesive though...you would be using a trowel size of about 8mm for that sort of tile and depending on the calibration of the slate and your requirements you would go above that.
I would go for a tile backer board personally

The 3mm calculation is for a 3mm solid bed..

Originally Posted by Sir Ramic

You could use one of the lightweight adhesives which would lose a bit of weight.

Well theres a good idea, can you recommend a lightweight addy so i can look into it, cheers:0

New Range Of PCI Nanolight Adhesives

Originally Posted by buddha1964

The 3mm calculation is for a 3mm solid bed..

You will struggle to get a solid bed with 3mm adhesive, its not enough for what you want it to do..

Take the dot and dab plasterboard off and fix direct to the solid wall!

I would seriously think about the backerboard method....sleep well at night and you will also wake up in the morning without a chunk or slate in your forehead.

Originally Posted by diamondtiling

You will struggle to get a solid bed with 3mm adhesive, its not enough for what you want it to do..

It was only for calculation purposes, i have a guide for a 3mm solid bed or a 6mm solid bed, so i was thinking 6mm notch would give me 3mm solid. Don't know if thats correct or not but just trying to work weights out which is a bit confusing

Originally Posted by timeless john

Take the dot and dab plasterboard off and fix direct to the solid wall!

Thanks John, do you happen to know the weight limits for tiling onto light weight blocks?
Would make a bloody mess but would rather do this than hardibacker..

Originally Posted by buddha1964

It was only for calculation purposes, i have a guide for a 3mm solid bed or a 6mm solid bed, so i was thinking 6mm notch would give me 3mm solid. Don't know if thats correct or not but just trying to work weights out which is a bit confusing

If I was you Budda I would take TJ's and S/R's advice, get your substrate mechanically fixed to avoid the tile in the eye.

Originally Posted by Sir Ramic

I would seriously think about the backerboard method....sleep well at night and you will also wake up in the morning without a chunk or slate in your forehead.

Ha ha!! will you stop keep going on about backerboard, mechanical fixing a board is out of the question. If this was the only way I would have to brave up and tell her NO!

Why is it out of the question to mechanically fix??

Originally Posted by diamondtiling

If I was you Budda I would take TJ's and S/R's advice, get your substrate mechanically fixed to avoid the tile in the eye.

Wait a mo! waiting for an answer on the light weight block option. If its backers its a NO!! she can have mosaics for her feature wall lol!

Originally Posted by diamondtiling

Why is it out of the question to mechanically fix??

The fixings would have to go through the plasterboard into the block, plugged and screwed, Im guessing at about 10 per sheet (600 x 1200 ?), 6m2, would be a nightmare

Beer time for me...............

Originally Posted by buddha1964

The fixings would have to go through the plasterboard into the block, plugged and screwed, Im guessing at about 10 per sheet, 6m2, would be a nightmare

Yes well some things in life are not easy but are correct.

Originally Posted by Sir Ramic

Yes well some things in life are not easy but are correct.

Extremely wise words Neale.

Theres more than one way to do it correctly, i am open to other options such a taking the dot and dab plasterboard off and fixing to the lightweight blocks. Can any one tell me the limits for light weight blocks and preperation please

Originally Posted by buddha1964

Theres more than one way to do it correctly, i am open to other options such a taking the dot and dab plasterboard off and fixing to the lightweight blocks. Can any one tell me the limits for light weight blocks and preperation please

Taking the dot and dab off and fixing to the lightweight blocks is mechanical fixing? Thats what we are trying to advise you bud.

Originally Posted by diamondtiling

Taking the dot and dab off and fixing to the lightweight blocks is mechanical fixing? Thats what we are trying to advise you bud.

I think he means fixing the slate direct to the lightweight blocks.

Originally Posted by diamondtiling

Taking the dot and dab off and fixing to the lightweight blocks is mechanical fixing? Thats what we are trying to advise you bud.

Sorry I thought mechanical fixing was drilling and fixing not sticking, getting my wires crossed then

Originally Posted by Sir Ramic

I think he means fixing the slate direct to the lightweight blocks.

Gotcha, cheers Neale.

Originally Posted by Sir Ramic

I think he means fixing the slate direct to the lightweight blocks.

Yep

What blocks are we talikng about ? thermalite / other, either way, as long as they're in good condition they're going to be strong enough iirc, I'll try and dig outthe data sheets once we know what blocks you have