Important Changes to Tiling Standards

[Dlt]

Hi,

Just a quick question, doing a bathroom at the minute in a factory, put a 2.4m straight edge on the walls and they are not flat invert inwards. Does any one no the tolerance of the plasterboard and tiles? they are 600x300 porcelain square edged.

Thanks

 

[Dlt]

2mm Joints

 

[Flintstone]

The tolerance of plasterboard and tiles?

 

[Dlt]

Plasterboard, I got a 8mm difference in the middle! Just trying to find out what they are allowed

 

[J Sid]

stand to be corrected but thought 2mm over 2mt

 

[White Room]

As above

2-3mm I've had worse.

 

[J Sid]

alot worse. 🙁

 

[One Day]

Look for nhbc guidelines. From memory it's 7mm over 2.4m allowed but they are only guidelines for builders. In my experience 70mm over 2.4m is the norm.

 

[SJPurdy]

Put a 2m long straight edge anywhere on the plasterboard and if there is any gap greater than 3mm between the straight edge and the board then it is not flat enough to tile.
On the tiled wall do the same test using a 2m straight edge with 3mm feet each end. If the gap between this and the tiles exceeds 6mm or the straight edge touches the tiling then the tiling does not meet BS.
This is based on my memory of reading BS5385 a while ago (I no longer have an up to date copy).

The same tests apply for the flatness of a floor substrate and floor tiling.
On a large floor the surface should also be flat within +/-15mm of the datum or as per the architects specified tolerance. I don't know the equivalent wall building tolerance.

 

[Flintstone]

And in the real world, that's a load of tosh.