What size trowel should I use?

[zappastix]

Hi

I will be laying 30cm x 40cm Wickes Onyx (printed) Stone Effect floor tiles.

I will need a flat bed.

If possible I would like the height of the adhesive bed to be between 6mm to 10mm (10mm preferred).

What size notched trowel should I be looking at - also should it be "round" notches?

Many thanks.

Stephen

 

[Richard C]

As I posted on your previous thread, a 10mm adhesive bed thickness is pushing it too far & will at best result in the finished tile surface looking awfull & at worst lead to tile failure. Apart from local filling/levelling, the maximum recommended solid bed adhesive thickness is 6mm. You should first lay a self levelling screed or quickset render/screed; it’s too thin for an ordinary screed which is likely to fail at that thickness apart from needing 3 weeks to dry before tiling! You could even fix some 6mm lightweight tile backer boards to bring the floor up to the required level then tile over that using a flexible adhesive & grout.

About the largest grooved trowel you will see is a 20mm x 10mm deep curved notch trowel @ 28mm centres & this will give an average solid bed thickness of around 3-4mm; try to achieve much more than this over the entire floor is likely to end in disappointment not even considering the additional cost of adhesive!

 

[zappastix]

Thank you Richard, the penny's finally dropped.

I will now buy a 20mm x 10mm deep curved notch trowel @ 28mm centres.

I was trying to raise the floor for the WC / Soil pipe.

I'll see what I am left with and probably have to use plywood under the WC.

Thanks again.

 

[Richard C]

I was trying to raise the floor for the WC / Soil pipe.

What’s the problem there then, a multi quick pan coupler will usually take care of far more than that?

Make sure you use a quality trade cement powder adhesive & grout not cheapo DIY crap.

 

[jctilingservices]

I was trying to raise the floor for the WC / Soil pipe.

I'll see what I am left with and probably have to use plywood under the WC.

Thanks again.

Just go to a plumbing merchants and buy an "offset" pan connector, they are about £9