Floor Area

[jimbo]

Anyone happen to know the largest floor area that can be tiled before using expansion joints?

 

[Tile Shop]

Without UFH = Every 10 metres, Every 8 metres
With UFH =Every 6 metres

But these are in addition to a perimeter joint which I don't actually know what the minimum width is, but am now on a mission to find out, unless anyone else on here knows? 3mm? 5mm?

 

[jimbo]

Thanks for your reply.Appreciate that

 

[Tile Shop]

Sorry, had to edit the above post.

As it is not done on square meterage, is done on total length/width of the area.

 

[SJPurdy]

My notes are based on 2007 copy of BS5385 (which may now have been changed/superceeded)!

On unheated floor the maximum length of a tiled bay is 10m, so the maximum unbroken tiled bay area is 10m x 10m= 100m2. If any of the bay lengths exceeds 10m then it needs intermediate movement joints so that no bay exceeds 10m (personally I can't see how any movement joints in the tiling can work unless they go through the substrate as well, or the tiling is fixed onto a de-coupling membrane).

For heated floors which includes floors in direct sunlight the maximum bay size is 40m2, and the maximum length of a side of the bay is 8m (therefore it could be 8m x 5m=40m2; or eg. 6.3m x 6.3m=39.69m2)

Note that where uncoupling membranes are used there may be smaller dimensions required by the membrane manufacturer.
I also have a penciled in note that some other authority recommends max 25m2 (I probably read it on one of the forums)

Minimum perimeter joint width is 6mm I think like the intermediate ones (if needed). 6mm width also minimum recommended in wall tiling!!!- and who adheres to that!
My notes also say perimeter joint only needed if constraining walls are greater than 2m apart (2007)- but I think that may have been deleted in later BS recommendations - not really helpful on my part but just something to watch out for when hopefully someone confirms with an up to date copy.

 

[jimbo]

Thanks SJPurdy. The tiles are being laid on SLC on concrete base.

 

[Tile Shop]

Mine was from schluter which is taken from BS, apart from the wood floor bit which was advised from another company who had a problem so more precaurionary than gospel.

I like you thought it was done by square meterage which i posted originally, but then spotted in the schluter notes it wasn't based on overall area.

I shall have a look at the latest BS tomorrow to double check, but if you were to do it based on length/width, it can't go wrong as the areas could be smaller.

Thanks for the bit about the perimetre. Another bit i can add to my ever growing book of notes

 

[Unused Account 1]

How big is the total area

 

[jimbo]

About15m x60m

 

[Unused Account 1]

What is it thats a massive area

 

[jimbo]

An old open office building being converted to a showroom

 

[Unused Account 1]

Normally a job that big has architects drawings ,and expansions joints in the spec,just finished a shopping mall floor ,joints everywhere to many really ,crazy.good luck

 

[SJPurdy]

About15m x60m

On the face of it the 15m broken into 2 x 7.5m by a centre movement joint; and the 60m broken into 6 x 10m minimum (8x 7.5m might look better and be more within the spec). However, I would definitely be calling the tech help of Schluter (or relevant movement joint strips supplier) and probably that of the adhesive manufacturer as well as the 60m of concrete is out of my comfort zone and I suspect will need decoupling. I have tiled them in the past but always with advice and usually an architects drawing to work to.