600 x 600 Floor tiles

[carpo]

Hi Guys,

Should be starting my kitchen floor tomorrow, would have been today but the floor was more than a little uneven so took all day to sort that out SLC etc.

I am after a bit of advise before I go off at the deep end

Basically I am tiling onto a concrete floor that has a layer of water based SLC on top, for question should I apply a primer before adhesive?

The tiles I have a polished porcelain 600 x 600 they are from B&Q. I purchased some mapei mapeker rapid set flex from Tile Giant and was planning to use a 10mm notch trowel, but I am sure it stated on the pack to use a max of 5mm which seems a bit low for such a large tile.

Can anyone offer any advise on the best way top proceed?

Carpo

 

[doug boardley]

Hi carpo, I'd be using a 20mm (10mm radius) U notched solid bed trowel. 5mm is way to small imo to get 100% coverage. Make sure you give them a good twist as you lay them to get good contact. Also give the tiles a skim of adhesive with the flat blade of your trowel to fill in the profile studs on the underside of your tiles as you're laying them

 

[faithhealer]

no need to prime and I am doing similar tiles today with same trowel, should be ok when you bed it in

 

[nybor62]

there is no need to prime slc as long as it is dry and dust free.
polished porcelain also needs sealing before you grout
as regards your trowel. you want a u notch trowel ,10mm is not big enough
i would use 15- 20 mm so you get 100% coverage of the tile.
i also think you would be better with a pourable thick bed adhesive.

 

[Rav daniels]

Hi yes that adhesive is fine, as said no need to prime unless dusty, I would use 10 mm u notched trowel, and seal tile before grouting, good luck

 

[carpo]

Thanks for all the replies guys :smilewinkgrin:

Good job I asked first, so looks like I need to go back to Tile Giant today, may sound a silly question but a 20mm (10mm radius) U notched solid bed trowel is that 20mm deep by 10mm wide?

If I take the mapei mapeker back what would you recommend I buy instead? next door to Tile Giant is a Topps Tiles so should be able to get BAL if needed.

Thanks for the heads up about sealer, I was going to seal after grouting on advise of the shop!! again any recommendation on the best sealer to go with?

Carpo

 

[Rav daniels]

And I would use minimum 3 mm spacers for that size tile

 

[carpo]

Right I checked and it's 20mm wide by 10mm deep, so will pick one up today. I am looking at buying the LTP MPG for sealing the tiles.

So just need to confirm if I should change the adhesive for a thick bed pourable?

I went for 3mm spacers.

Carpo

 

[nybor62]

imo i would use thick bed pourable flexy. no need to back butter tiles, and i dont think 10mm deep is big enough. bal do a solid bed trowel think its 15mm .
you will only get 3m2 coverage out of a 20kg bag with a large format trowel so make sure you get enough addy

 

[Perry]

i think the 5mm is the max depth of finished adhesive not the trowel size most adhesives are 5-6 mm