Thread: Worried about installing 18 x 18 porcelain

Thanks. I will go with Customs Marble and Granite.

I use an eight foot straight edge. That will give you a pretty good feel for what kind of shape your floor is in.

Welcome to the forum. Is your heat in the slab? Also, any control joints under the carpet to deal with? The medium bed mortar will be great for the large format tile. I still use the same trowel for 18x18 as I do for 12x12. Only difference is I spread thinset on the floor and instead of skimming the back of the tile with the flat side, I spread with the notches on the back of the tile. The weight of the tile can be over come with the use of a...

I did our kitchen in 18s... My only regret was not leveling it first. I was in a hurry and thought i would just level as I went. Big mistake! I will never do that again, but do have to say, the floor came out very level. I can lay my 6 foot level across and its nearly perfect. Just took my time and used a 6", 24", and 6' level. I kinda screwed up the grout also trying to rush... But I can not complain, I had company...

Hi... for what its worth i just did 330sq of 20x20 on a slab. its took 3 days at 8hrs a day and looks wonderful. i also buttered the back of the tiles. i found that once i got the same considency down on my mix of the thin set the tiles all started to sit at the same hight. i also shuffeled the tiles when i set them. id post pics but the forum wont let me good luck. oh i also use a 1/2 by 1/2 sq notched trowel.

A medium bed mortar will make it easier to get, and keep those tiles where you want them. A few options depending on availability- Laticrete 220 Laticrete 255 Customs Marble & Granite Mapei Ultracontact Mapei Ultralite