Trowels & Adhesive

[martin1c]

Hi Guys, I'm fitting some large tiles. The wall tiles are 33cm x 100cm. Am I right in thinking a 6mm square notched trowel will be ok for these? The floor tiles are 44cm x 66cm (porcelain) and I was thinking 10mm round notched trowel. Also, wasn't sure whether to go with butech adhesive or toppfix. I'll be using bagged adhesive for walls and floors due to tile size etc. Has anyone got any other tips or suggestions?

[andy allen]

what are the walls your tiing to ie. plaster, plasterboard, cement board and whats the floor substrate

[martin1c]

Two walls are plaster, the other two are plasterboard. The floor is currently chipboard but I'll be putting down 9mm ply on top and screwing down at 10-15cm intervals. I know that 9mm isn't ideal but the customer doesn't want too much of a step into the bathroom. Actually, just realised the shower wall will be 12.5mm backer board.

[andy allen]

what is the weight of the wall tiles? i think you may find there to heavy for a plastered wall and 9mm ply is to thin

[martin1c]

Wall tiles are ceramic and 9mm thick. Not sure of exact weight each but was told by Porcelanosa that they are well within 20kg/m2 recommended maximum tile weight on plasterboard walls. I take your point on the 9mm ply - not my recommendation but the client is at least thinking about it still

[doug boardley]

I'd be using an 8mm trowel for those tiles Martin, butech is a decent enough addy that porcelanosa like to push.

[kilty55]

hello,i would be using a larger trowel than a 6mm for those tiles mate
20 kilos per sq metre is for plaster skim mate not plasterboard best thing to do is check weight on side of box especially with metre long tiles

if you dont want a step in the room if the floor is solid you can fix a 6mm cement board this is a better solution than 9mm ply

good luck

[doug boardley]

I've tiled acres of these large format porcelanosa tiles Jamie, they're not that heavy tbh, but deffo agree on a larger notch than 6mm.

[martin1c]

Thanks guys. Was thinking about the cement board actually. Nicer to tile on to as well

[Dave]

What is the chipboard fixed to.?