Tiling questions

Soldato
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First.... I`m a tad concerned that my initial appraisal "acht it will be ok", might not be accurate lol, I intend (ed?) to tile a part of sloping ceiling in my bathroom, however as the actual deed looms I`m getting concerned incase its a bit mental, essentially the slope is as in the pic below, tile is porcelain and 600mm x 300mm x 8.5 mm............question is will they fall off?, I`ll be using decent cement based powdered adhesive (not the ready mixed stuff), also if we think it will be ok any novel methods of holding them in situ till adhesive sets?

IMG_20130705_185739.jpg

An additional query is my planning.....I`ve tried a rough panorama shot on my phone to illustrate, The tile sitting on the batten is where I *think* my first tile should be, extreme left is door frame, extreme right is where bath will be, I intend starting on a full tile from extreme right so that both walls will meet in middle corner with decent sized cuts (and in the middle corner will be the least seen area as one side of three sided shower will obscure), from first tile to floor is exactly one tile leaving a cut for the top at the ceiling.

Essentially am I about to make any glaring errors? :eek:

PANO_20130705_190035.jpg
 
there was a further link which mentioned about using screws to fix the tiles in place then unscrew once they were set
 
there was a further link which mentioned about using screws to fix the tiles in place then unscrew once they were set

yes seems a possibility, I could screw a batten over the top of the tiles to hold them on, but that would only work for ones i could get screws in at either side............hmm, need to think, bound to be a variation of this possible
 
Make sure you're putting them on to a decent board to ensure a good surface.

I'd use something similar to Dunlop Fast Set Plus (it's what I've used, hence my vote for it), which has a very high initial grab. At 8.5mm they're fairly dense tiles, so you'll want good grab. Don't make the mix too wet.

Sure, you could batten them, but by the time you've got the batten in place, you'll already know if they're going to move or not.
 
Make sure you're putting them on to a decent board to ensure a good surface.

I'd use something similar to Dunlop Fast Set Plus (it's what I've used, hence my vote for it), which has a very high initial grab. At 8.5mm they're fairly dense tiles, so you'll want good grab. Don't make the mix too wet.

Sure, you could batten them, but by the time you've got the batten in place, you'll already know if they're going to move or not.

cheers m8, def worth investigating best adhesive for job
 
Oh the fun you will have...:D

The way I've done in the past is have a piece of ply the width of the area your tiling, & as your tiles are 300mm width of ply will be 225mm-250mm wide.
Screw a 2x1 bearer the width of the ply, this will stop the props sliding.

You will need some help for the next step, place ply on slope, measure from slope to floor at an angle, cut two bearer at the require length, check they fit & mark floor, then you can screw a bearer to floor, this will stop the prop sliding.
Make props long enough, so they can reach the higher rows of tiles.

With the weight of the tiles, I found tiling one row was enough to cope with at a time.
Lay one row, cover with the the ply, using props & bearer to hold tiles until dry.

Dunlop Fast Set Plus would be adhesive choice.
You need enough time for the tiles to be secure, & not drop off.
 
The secret of success is the board they are being stuck to, if it's highly adsorbent,then there are high chance of tiles failing.
Also if you use existing board as in your photo, make sure it's screwed.:o

A few years ago, I tiled a slope, & the weight of tiles pulled the backing board completely off the bearers.
Ended using Backer Board securely screwed to the bearers, expensive lesson learnt.:o
 
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Oh the fun you will have...:D

The way I've done in the past is have a piece of ply the width of the area your tiling, & as your tiles are 300mm width of ply will be 225mm-250mm wide.
Screw a 2x1 bearer the width of the ply, this will stop the props sliding.

You will need some help for the next step, place ply on slope, measure from slope to floor at an angle, cut two bearer at the require length, check they fit & mark floor, then you can screw a bearer to floor, this will stop the prop sliding.
Make props long enough, so they can reach the higher rows of tiles.

With the weight of the tiles, I found tiling one row was enough to cope with at a time.
Lay one row, cover with the the ply, using props & bearer to hold tiles until dry.

Dunlop Fast Set Plus would be adhesive choice.
You need enough time for the tiles to be secure, & not drop off.

This was my initial heath robinson-esque plan lol, good to hear it works
 
The secret of success is the board they are being stuck to, if it's highly adsorbent,then there are high chance of tiles failing.
Also if you use existing board as in your photo, make sure it's screwed.:o

A few years ago, I tiled a slope, & the weight of tiles pulled the backing board completely off the bearers.
Ended using Backer Board securely screwed to the bearers, expensive lesson learnt.:o

lol this scares me a bit, this is the original plasterwork I intend tiling onto, *seems* robust-ish :confused:
 
This was my initial heath robinson-esque plan lol, good to hear it works

It works, but it's slow & needs two peeps to do it.
The newer high grab adhesive makes the job easier today, than yesteryear, & you might get away without the need of support.

But, it's the weight of the tile & quality of the backing board that can give you serious problems.

EDIT: Put some plasterboard screws in it, they will make it secure, if it's nailed the weight of tiles can pull the plasterboard through the nails, I speak from experience.:o
 
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It works, but it's slow & needs two peeps to do it.
The newer high grab adhesive makes the job easier today, than yesteryear, & you might get away without the need of support.

But, it's the weight of the tile & quality of the backing board that can give you serious problems.

EDIT: Put some plasterboard screws in it, they will make it secure, if it's nailed the weight of tiles can pull the plasterboard through the nails, I speak from experience.:o

Ahh, that seems a good idea, could be nailed with those small headed nails
 
I would 18mm wbp ply over the sloped area getting a good fix into the rafters then use a good adhesive. The bond is only as good as the base its going on.
 
18mm?! Massive overkill for a wall/roof like this when there are regular battens behind it. If overboarding then even 6mm would probably be ok. That said, if the board the OP is working on to is already sound, then no need to worry.
 
It looks like old lath and plaster to me to be honest and I wouldn't trust it to hold 100kg of inverted adhesive and tiles. 18mm might seem overkill but there's no way i'd go below 12mm, 6mm would barely stop the screw pulling through when you fixed it.
 
hmm, overboarding may not be an option due to proximity of shower cubicle.........however it will only be about 9 tiles in total, still a fair weight, unless of course i abandon tiling the slope, BUT then I would need to come up with another solution........

edit: overboarding is possible :-)
 
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Looking closer at your photo, I now see it's plaster lath, I wouldn't even tile on that, & wouldn't even consider overboarding, but completely replace it.
 
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