Anhydrite or Concrete - dont know - TilersForums.com

[Filip]

Thought I would have an easy job to tile my daughters new build house kitchen floor but then I start reading on help forums about Anhydrite floors. But I do not know if she has one or not, its a new build Barrett home.
My local supplier stocks Tilemaster and I see that they do Anhyfix but the spec says it is not suitable for a normal concrete floor which I do not know if she has.
So what to do - do I sand and then SBR or APD and then use a normal cement based adhesive.

 

[Tile Shop]

I have a feeling that all Barratt homes are Sand/Cement screed, (based on recent local plots) but would double check with them just in case . Failing that, if you can take a picture and post it up here, we may be able to ID it for you. It wouldn't be wise for us to advise a solution until you know what you're dealing with.

 

[Andy Allen]

If its a new build on a housing site i can almost guarantee its a sand and cement floor, give it a good scrape to remove any debris, prime with an acrylic Primer and tile away..
BTW. .....They sometimes level the floors with SLC which can look like a anhydrite screed .

 

[Filip]

Thanks chaps for the quick reply,pictures attached I will get my daughter to ask the site people as it is a big build that will be going of for years. I will have a look and a poke but I have a picture taken when they let us in at pre plaster stage to see where all the pipe and cables were and it looks a bit light grey like the photos of Anhydrite I have seen. But another one taken the other day when they had to rip out and replace a cupboard looks like sand and cement.

 

[Filip]

been over today and spoke to a site manager who said that the floor is concrete and then its floated to give a smooth surface. On closer inspection I can see that some of the top smoothed layer has come off leaving a harder screed looking surface.Some areas are compleatly free of any top surface. Some of the smoothed areas are quite hard and others are easily scrapped off. Is there anything wrong with this approach.
Sand off the areas that are weak and leave the rest.
Seal with two coats of Prime Plus | Flexible Primer & Bonding Agent | Tilemaster Adhesives - http://www.tilemasteradhesives.co.uk/preparation-products/primeplus-flexible-primer-and-bonding-agent
And then use Standard Set Extrabond | Standard Setting, Polymer Modified, Wall and Floor Tile Adhesive - http://www.tilemasteradhesives.co.uk/adhesives/standard-set-extrabond-tile-adhesive
Its a kitchen and the tiles are ceramic 60x30.
Attached close up pictures of floor

 

[Bill]

What ever it is it is in poor condition...... 600x300 ceramic on floors is asking for trouble. Are the British Ceramic Tile by any chance?

Any UFH?

 

[Filip]

No UFH and the tites are regional reflections from tops (Dwyan slate colour )

 

[Bill]

The tiles are porcelain not ceramic.

 

[Filip]

I don't have the box in front of me but the 10 page mini brochure does say ceramic

 

[Bill]

According to Topps website ... they are porcelain.