Back Buttering

[Martino]

Should i only back butter porcelain tiles, and can someone tell me why do this and not every tile?

 

[Del W]

Back butter all floor tiles,you should be looking for 100% coverage.

 

[doug boardley]

I back skim all tiles, apart from sheet mosaics, I back butter if there's indiscrepancies in the substrate and areas need padding out a little.

 

[White Room]

Some floor tiles have a deeper profile so would struggle to have enough adhesive depth to be fixed properly so as above back skim all tiles...

 

[Peter]

I would back skim anything over 300x300.

 

[cam_low]

As above with Wingn, I back butter everything over 300x300, I back butter every floor tile also.

 

[Andrew]

I tired a slightly different method today to my normal back buttering, after watching another tiler use it and discussing it with him. Notched floor and back of tiles (600 ceasar stone)8mm on floor 4mm on tile and cross bonded, the sub floor was slightly out and this method made light of it.

 

[doug boardley]

I tired a slightly different method today to my normal back buttering, after watching another tiler use it and discussing it with him. Notched floor and back of tiles (600 ceasar stone)8mm on floor 4mm on tile and cross bonded, the sub floor was slightly out and this method made light of it.

my concern there is the potential for trapping air pockets Andrew and therefore not getting a solid bed.

 

[nybor62]

all ways back butter large formats ,

 

[Divad]

I back skim all tiles, apart from sheet mosaics, I back butter if there's indiscrepancies in the substrate and areas need padding out a little.

What are indiscrepancies?

 

[doug boardley]

What are indiscrepancies?

if the wall isn't perfectly flat and there's maybe a dip or two in it

 

[doug boardley]

Just for clarity, I've always called trowelling back of a tile with serated edge "back buttering" and trowelling it with flat edge "back skimming", if that makes sense

 

[Perry]

I tired a slightly different method today to my normal back buttering, after watching another tiler use it and discussing it with him. Notched floor and back of tiles (600 ceasar stone)8mm on floor 4mm on tile and cross bonded, the sub floor was slightly out and this method made light of it.

Also most adhesives have max deph of about 5 mm as was said don't cross bond no air pockets solid bed

 

[Andrew]

It was meant 8mm 4mm on tile 4mm on floor. And adhesive was good to 12mm, as i said the floor was a little out and the extra few mm got me over it.
regarding the air pockets never gave it a thought, I think I shall be returning to my tried and tested!

 

[Perry]

It was meant 8mm 4mm on tile 4mm on floor. And adhesive was good to 12mm, as i said the floor was a little out and the extra few mm got me over it.
regarding the air pockets never gave it a thought, I think I shall be returning to my tried and tested!

What adhesive was that?

 

[Andrew]

Instramac Ultra prorapid rs

 

[Muse2k8]

No need for back buttering when you use dot & dabs fails every time

 

[widler]

Also most adhesives have max deph of about 5 mm as was said don't cross bond no air pockets solid bed

really,5mm,im surprised,as not every floor is completely flat,and we should always use a 10mm trowel or more on floors

 

[peteablard]

really,5mm,im surprised,as not every floor is completely flat,and we should always use a 10mm trowel or more on floors

10mm trowel used at an angle will give approx 8mm bed, press your tile down firmly and there's your 5mm

 

[Tony73]

No need for back buttering when you use dot & dabs fails every time

:devil: back butter every tile , wall or floor, all the time. gives much better bond. plus if you do 10mm natural stone (white marble etc) in wet rooms, when walls/floor get wet, dots will show.

 

[widler]

10mm trowel used at an angle will give approx 8mm bed, press your tile down firmly and there's your 5mm

get away with ya,never :lol:,

just would of thought most adhesives would be able to do thicker than 5mm,aint a right lot really in the grand scheme of things

 

[widler]

:devil: back butter every tile , wall or floor, all the time. gives much better bond. plus if you do 10mm natural stone (white marble etc) in wet rooms, when walls/floor get wet, dots will show.

tony,he is taking the gypsy's mate

 

[peteablard]

get away with ya,never :lol:,

just would of thought most adhesives would be able to do thicker than 5mm,aint a right lot really in the grand scheme of things

Sorry mate I read your post wrong, wasn't trying to teach you to suck eggs!!

 

[widler]

Sorry mate I read your post wrong, wasn't trying to teach you to suck eggs!!

i know mate,no problemo

 

[Muse2k8]

In all seriousness though, especially on floors you need 100% coverage (although do BS not give floors as needing 90% and walls 70%?). Any voids under a tile can crack and break and as mentioned on stone like white marble the addy will stain so by giving 100% coverage you maintain a flawless look.