Exceeding substrate weight limits.

[Rizzle from the Portizzle]

Never had it myself only ever heard of problems from adhesive reps.

well maybe a few reps could exsplain how they came to that conclosion .what were the signs how do you determan that wieght is the cause after ruling out other causes

 

[Peter]

When were the last weight limits written? I'm sure adhesive and material technology has come on a bit since then

 

[The D]

When were the last weight limits written? I'm sure adhesive and material technology has come on a bit since then

The thing is the limits are set by the people that make the backgrounds and have nothing to do with the adhesive.

 

[The D]

I am not convinced that a tile stuck to a wall is putting the same amount of stress on the background as one stuck to a ceiling. I can understand manufacturers need to put the limits in place to cover themselves but that dose not mean that if you go over by a few kg the background will automatically fail

 

[John Benton]

I am not convinced that a tile stuck to a wall is putting the same amount of stress on the background as one stuck to a ceiling. I can understand manufacturers need to put the limits in place to cover themselves but that dose not mean that if you go over by a few kg the background will automatically fail

Exactly right Dean, They have to give a figure for people to work to, but it will also have a tolerance to allow for people who will always go that extra bit, cos that's what people do, isn't it?

I refer back to my tyre analogy, where the tyre will not automatically burst/puncture at 50mph. It is a recommendation that you do not drive faster than that speed, but some people will.

 

[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!! ..

 

[widler]

I suppose im overloading on this job im doing now, 600x300 ceramics on walls that were painted skim.
BUT i scratched the skim and scraped 90% of it off revealing a sand/cement render,so ive primed with the TIlemaster green primer (TA i think)and tiled, and i kid thee not, i took one off the day after, i found a iccle chip on the corner, had to smash the bugger off !
Stuck like poo to a baby blanket

 

[Perry]

even better Dave who has seen a failure due to a wieght issue ?

 

[High Peak Tiling]

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

shut your trap old man.

 

[The Legend; Phil Hobson RIP]

even better Dave who has seen a failure due to a wieght issue ?

Pete I once had a failure due to weight issues, we were laying onto semi dry the same day using boards to spread the weight. I'm sure most older hands will have done this method.

Our failure was down to one of the tilers,he was 45 stone, beggered the screed up good style.:lol:

 

[High Peak Tiling]

How long you been trading.. ?

trading under my own company for less than a year but in the trade for 5 years.

The company i used to work for did everything from bathroom, public toilets, pub wc's, park holiday sites, bar walk, kitchens. all commercial and domestic so probably worked with most substrates tilealbe.