Dural - Expansion joints ?

[SJPurdy]

So does the membrane have to have a join where the joints are or go over then a joint in the tiles where the joint was ?

Quoting from Dural Special advise leaflet; "The matting MUST be split at the movement joint"

 

[On one]

Do you mean the concrete has been laid,cured and someone has Stihl sawed a line/cut in the screed?
Is it possible for the expansion joint to placed under a door? ie to less intrusive

 

[tomo13]

Do you mean the concrete has been laid,cured and someone has Stihl sawed a line/cut in the screed?
Is it possible for the expansion joint to placed under a door? ie to less intrusive

Yeah looks just like that, is that normal ? I'm trying to find a way to get a copy of the plans on here so I could get some opinions of where to put them ?

 

[tomo13]

Thinking about it they would of had to go pretty steady to avoid the UHF !

 

[The D]

Ditra / Dura is NOT a replacement for an expansion joint it is a crack isolation mat and allows only 3mm of lateral movement. If there is an expansion joint in the sub- floor you must follow with an expansion joint in the tile.

 

[AliGage]

Tests on Ditra have withstood 9mm

 

[On one]

Tests on Ditra have withstood 9mm

Out of interest over what distance? or as a %. Not trying trip you up

 

[Ajax123]

This is correct.. but you'll find difference of opinions, i work for chartered architects and they all say different, i'm doing a church in newbury in September, and the architect states following expansion strips in line with the ones in the screed, with an 8mm expansion abutment at the perimeters, and then i'm working for an chartered architect in Kingston on a new build, and he states that ditra alleviates the need for expansion joints, note: they are both chartered ( which should mean the same standard )
rule of thumb: If there are expansion joints in the screed, follow then on the tile surface. full stop, if not, expansion on the tile surface only, will do nothing, or play safe and use expansion every 5m linear or through doorways with ditra. in a domestic instance, expansion joints look unsightly, in a commercial instance, it is a grey purchase, ie: its what has to be because the architect spec'd it.

I don't think it's a matter of opinion. The rules are laid out in various best practice guides including, including I believe, bs5385 ...

 

[AliGage]

Out of interest over what distance? or as a %. Not trying trip you up

Only recall it from a video shown on Schluters 2day workshop. Although I don't believe its published as official,

 

[Dan]

Just bumping this thread. If it's not a current topic then don't worry about it for now. Other threads like this can be found in the main tiling forum. If you do want to reply to it, please do. Your information may add value to somebody reading the forum in the future.