Exceeding substrate weight limits.

[DHTiling]

I was chatting to 2 of the british gypsum guys face to face late last year , and the weight limit for PB was set yrs ago .... they say it will now hold more weight as the paper facing is thicker and of a lot better quality than when the limits were set yrs ago..

The limits really are a mine field when looking at everyday wall substrates we have to cope with... older houses have walls that have been up so so long and then we have new builds etc where the stud centers can be 900mm which creates another issue..

But a good tiler does or should know how far they can push the limits when tiling... as in weights..

 

[Andy Allen]

Has anyone seen, or heard of a failure, due to tiles being to heavy on the wrong substrate...?

 

[DHTiling]

Has anyone seen, or heard of a failure, due to tiles being to heavy on the wrong substrate...?

IMO i cannot say i have..

I have seen loads of de-bonds due to fixing methods but never a shear weight de-bonding..

 

[AliGage]

I suppose those that won't go a gram above and stick to the letter are those that throw food away when it reaches the use by date.
A lot of it is over precaution. If the board is in good order and fixed well i wouldn't be telling my customer she can't have the tiles she wants because its over by A kilo. Ill lose the job and she'll find someone that will fix them.
I wouldn't push the limits too much mind and 99 times out of 100 i replace with new anyway so i know how well its constructed.
Common sense and better judgement

 

[Peter]

If you're flat and true then theoretically they should hold in the centre of gravity regardless. Not an incredible stress on the substrate.

 

[charlie1]

If you're flat and true then theoretically they should hold in the centre of gravity regardless. Not an incredible stress on the substrate.

bingo!

 

[bugs183]

We';ve all done i, as we'd do no work otherwise, it doesn't matter how many times you tell tell everyone about substrate prep they rarely listen.
The worst i've seen is 20mm stone 600x300 on old painted plaster walls. I refused to touch any of the walls, and instead i had to tile on MDF walls in the shower! No tanking nothing. Just rubbish prep, asking for problems.

 

[High Peak Tiling]

Not to my knowledge in all honesty.
I always try to do things by the book, standards or Product data sheet. no overloading, no substandards = No callback!

 

[DHTiling]

Not to my knowledge in all honesty.
I always try to do things by the book, standards or Product data sheet. no overloading, no substandards = No callback!

How long you been trading.. ?

 

[DHTiling]

Eh.. ?

 

[Gazzer]

Eh.. ?

http://www.tilersforums.com/tile-adhesive-grout/68251-f-l-o-o-r-f-2.html#post692330

 

[Gazzer]

Not to my knowledge in all honesty.
I always try to do things by the book, standards or Product data sheet. no overloading, no substandards = No callback!

But 9mm ply

 

[DHTiling]

Ahh ok .. so full of poo then :lol:

 

[Gazzer]

Dunno , I guess there are some manufacturers that would say 9mm ply but I have always taken it as min 15mm. That said some adhesive manufacturers say PVA....but would you ?

 

[DHTiling]

Nah!! ..