Ditra laying methods

[suave]

steamroller :hurray::hurray::lol:

 

[Dougs Third Go]

whats wrong with just dry troweling over the top with a plasterers trowel and body pressure ??

only being a featherweight that's why I use a length of batten Dave, seem to be able to get more pressure onto mat without skidding but still be able to move it along

 

[jonnyc]

Well this brings another question up. I have always covered the top of mat with adhesive at same time as fixing mat.the reason for this is two fold.one is that when you quote the amount of adhesive you will need to fix tiles it is based on a flat subfloor not a ribbed surface that needs to be filled in . The other is the extra time needed to fill in the voids. When you fix a lot of metres in a year bothnthesevfactors make a big difference

 

[peteablard]

I use a karndean vinyl roller. The handle means you can get plenty of pressure on it, works a treat!

 

[John Benton]

Well this brings another question up. I have always covered the top of mat with adhesive at same time as fixing mat.the reason for this is two fold.one is that when you quote the amount of adhesive you will need to fix tiles it is based on a flat subfloor not a ribbed surface that needs to be filled in . The other is the extra time needed to fill in the voids. When you fix a lot of metres in a year bothnthesevfactors make a big difference

That's very true Jonny, you're effectively putting a solid bed of approx 3-4mm when you take into account the addy under the mat and then filling the depth of the voids on top, before you've even put your addy on to fix tiles. Like you say, doing it on a regular basis uses up hell of a lot of addy, and someone has to pay for it

 

[Peter]

Anybody ever worked out how much adhesive per metre the voids take up? A metre per bag?

 

[jonnyc]

If we are getting in to figures,I can say that if you use a 6mm notch under ditra mat and cover the ditra top you will need approx one bag average adhesive for 4sq
when using a vinyl roller no problem with 4.5 mm rubi notch underneath.
the vinyll roller really comes in to play with the psi pecilastic.
Only use 3mm notch for pecilastic and the the job is really easy.i can offer a good saving to client with this product

 

[Spud]

I did the schluter training course along with Whitebeam ,schluter gave us a 4mmx3mm mosaic trowel to fit the ditra and kerdi down with and said as long as you get full contact that is enough

 

[White Room]

I concur....

 

[On one]

Would be interested to know the coverage difference. Not entirely convinced that Ditra rubbed down by hand gives as good coverage as it would do if it's rolled and the adhesive is squashed more, even when mixed a bit looser. Ever notice there are some patches lighter than others? One for the testing team perhaps?

I did check the shading/100% contact issues with Schluter tech dept earlier this year(Using their supplied free trowel).They said this was normal and that 100% contact is not required.