screed drying time.

[Ajax123]

Yes. Take a look at the schluter website .... Ditra matting ..... That will tell you everything

 

[Mortorman]

Hi Guys, sorry to jump in your thread but my coservatory is going to be screeded on tuesday to a depth of 4inches, my plan was to leave it for one month, then prime twice, install 10mm insulation board on flexible adhesive, lay UFH wire, Latex then tile....... Does this sound like the best way to go to you pro's? someone suggested thati should lay ditra matting, the the thing is that i thought that insulation board would do a similar job to the ditra ie:acting as a slight deflecter. Or should i install both?

I will be tiling it with Travertine.

Thank you very much in advance

 

[bugs183]

Ajax's your man for screed advise here.
Ditra mat doesn't effect the underfloor heating, so use it.
What your saying is the right way to lay your floor.

 

[Mortorman]

Ajax's your man for screed advise here.
Ditra mat doesn't effect the underfloor heating, so use it.
What your saying is the right way to lay your floor.

Wow that was quick, thanks Bugs.

Are you saying to use it as well as the insulation board or instead of the insulation board? If using it with the insulation board where would it's place be on the floor

Thanks mate

 

[bugs183]

I have no life but this forum Motorman!!
Yea sorry didn't make much sense that. Lay your screed, allow to dry. Fix the insulation board with a good quality flexible adhesive (i use a 10mm trowel to get there to be bed nicely). I'd leave that overnight to dry. Test the ufh and use an electronic alarm during the installation to check it doesn't get damaged.Lay out the underfloor heating. Take photos so you have an idea where the cables run.
Now i do the next part a bit differently than the others here, its a bit messy but i hate faffing with tape and glue guns and swearing at the wires that refuse to lay flat. I trowel rapid set adhesive with a 6mm notched trowel onto the insulation boards, roll the ufh into this and then lay fibreglass mesh over the top (this is used for reinforcing render and comes on a 50m roll and is 500mm wide), then i press this into the adhesive and trowel in down. Its a bit messy and sometimes awkward, but i never have any hassle with the cables afterwards!!!
Leave to dry or level straight on top.
Leave overnight, get your 5-6mm trowel and again with flexible adhesive trowel this onto the dry levelling compound ad roll the ditra onto this. Get piece of wood 3x2 is a good size and use it to press the ditra into the adhesive. Leave overnight.
Start tiling!

 

[Mortorman]

Great stuff, thanks mate. Just out of interest if sfter laying all this down the sand/cement shrinks a bit and cracks would the insulationboard absorb this or deflect this the same way the Ditra matting would?

All this stuff is very interesting, a bit addictive almost!

Thanks again

 

[bugs183]

Good question, there and one i can't answer 100% confidently.
It must have some give due to its make up, but no normal drying cracks should effect the underfloor heating, things would have to be pretty bad for that to happen.
The ditra can part within itself, yet remain the same shape, this is why it is such a good product.
Well if you spend all day tiling pretty much 7 days a week it does make good reading, and the guys here really know their stuff (i don't get involved in any football talk, not a fan at all!).

 

[Mortorman]

Thanks for that, i would have thought it would act as a defection barrier simply because it's got a foamy type material in the middle of it, but then again that could just be my lack of knowledge speaking!! Probably like most other things i have read on here, there is a bit more to it than that.