UFH & SLC advice pls

[ollymonkeynuts]

Hello to you all,

I have a 6mx4m kitchen diner onto which im planning to install 12m Devi (0.5m wide) UFH on the walking/cooking areas then tile it. There will be an island and obviously kitchen cabinets which I dont plan to tile under. My question refers to the SLC over this UFH.

Can I lay the SLC just over the areas of UFH using batons to restrict the coverage of the SLC - then lay thicker addy over the rest of the WBP ply flooring? Or should I just go with SLC over all of the floor and keep things simple?

Ive researched the Marmox & priming side of things so its just a query on the above. Thanks. Olly

 

[Mike Mike]

SLC the whole floor. It is much faster tiling onto a floor that is flat and level than trying to build up parts of the floor with thick adhesive. Also, you run the risk of lippage, especially as the adhesive shrinks as it cures, so in addition to taking longer to tile, the finished result might not be as high quality.

Good luck with it Olly.

 

[ollymonkeynuts]

Thanks for that Mike. There are really no short cuts when it comes to tiling. Ive just checked a bag of Mapei ultrplan I have and its good for up to 30mm, the non UFH areas will be 10mm (Marmox) and 3mm (Devimat) lower so I'll need approx 15mm of SLC to cover the whole area with 2mm over the UFH.

Its gonna cost a bomb to do though! The Ultraplan covers 6m2 @ 3mm thickness so at 15mm thickness a 25kg bag will do 1.2m2.

For the 18m2 of non UFH will take about 15 bags @ roughly £20 is £300. Plus another bag for the 6m2 of UFH. Arghhh!!!

Any suggestions so it doesnt cost that much?

 

[Mike Mike]

Thanks for that Mike. There are really no short cuts when it comes to tiling. Ive just checked a bag of Mapei ultrplan I have and its good for up to 30mm, the non UFH areas will be 10mm (Marmox) and 3mm (Devimat) lower so I'll need approx 15mm of SLC to cover the whole area with 2mm over the UFH.

Its gonna cost a bomb to do though! The Ultraplan covers 6m2 @ 3mm thickness so at 15mm thickness a 25kg bag will do 1.2m2.

For the 18m2 of non UFH will take about 15 bags @ roughly £20 is £300. Plus another bag for the 6m2 of UFH. Arghhh!!!

Any suggestions so it doesnt cost that much?

Double check how many kgs/mm/m2 your SLC is, usually it is between 1.6kg per mm per m2 to 1.7kg. That would be 17.3 - 18.3 bags @ 25kgs each.

The only way to save money is find a less expensive SLC than the Mapei, or find the Mapei cheaper.

You can buy fiber reinforced SLC here for 99kr for 20kg, that's 46 pence a kg, £9.20 a bag. That's a retail price, no special trade discounts or anything. 25kgs would be £11.61.

Why is that Mapei so expensive? Our VAT is 25% and we get ripped off for EVERYTHING, so I would expect in England you could buy SLC for £7 - 8 for 20kgs x 18 bags = £126 - 144...

Maybe someone else on here can advise you a good place to buy SLC for sensible prices???

All the best