Discuss What are these marks, can I clean and prevent in the Tile Cleaning and Restoration Forum area at TilersForums.com

D

dedee

TF
Joined
Oct 8, 2018
Messages
11
Reactions
8
Location
South of england
In a couple of places on our terrace these white stains have appeared. Can this be easily cleaned without damaging the non slip porcelain tiles.
The marks have the appearance of the type of calcium type build up from hard water. We have never put tap water on the terrace.

Any advice gratefully received..

thanks

Andy

edit the whole terrace can been seen here

IMG_20200914_095353.jpg
 
Dan

Dan

Admin
Staff member
Joined
Apr 2, 2006
Messages
27,124
Reactions
5,262 27
Location
Staffordshire, UK
What member type are you?
DIY Wall and Floor Tiler
I want to say efflorescence but it appears to be running down the surface of the tiles to me. Which efflorescence wouldn't do I don't think.

Have you tried a cleaner first to see what that can get off?

Can you test a tiny area with something that could scratch the surface a tiny bit to see if it's just on the surface of the tiles?
 
D

dedee

TF
Joined
Oct 8, 2018
Messages
11
Reactions
8
Location
South of england
  • Thread Starter Thread Starter
  • #3
Hi Dan, thanks for you reply.
I had not heard of efflorescence before. Having googled it I think that it is the problem. I tried a little 10% acidity white vinegar and I can see the residue bubbling away, just like in the kettle. Attached is a photo after a little cleaning with said vinegar and a view of the grout showing distinct white deposits.
The tiles were laid on a schluter drainage mat and hence it is seeping out of the schluter bara rak edging.
I guess there is little I can do to stop it.

When searching efflorescence a product called ZIDO cropped up. Are you familiar with this or any other cleaning product that you could recommend as i understand that vinegar could possibly damage the tiles.

Many thanks



Image of grout on horizontal
IMG_20200918_120047931.jpg

Original stain after 10% vinegar
IMG_20200918_120211528.jpg
 
Dan

Dan

Admin
Staff member
Joined
Apr 2, 2006
Messages
27,124
Reactions
5,262 27
Location
Staffordshire, UK
What member type are you?
DIY Wall and Floor Tiler
Oh it's efflorescence for sure then. :)

So the salts in the products used work their way to the surface then pool up.

So washing often will help. Then just deal with the pools of it which will be in the same place all the time.
 
D

dedee

TF
Joined
Oct 8, 2018
Messages
11
Reactions
8
Location
South of england
  • Thread Starter Thread Starter
  • #5
Oh it's efflorescence for sure then. :)

So the salts in the products used work their way to the surface then pool up.

So washing often will help. Then just deal with the pools of it which will be in the same place all the time.
Oh it's efflorescence for sure then. :)

So the salts in the products used work their way to the surface then pool up.

So washing often will help. Then just deal with the pools of it which will be in the same place all the time.

Thanks again Dan,
Are you able to recommend a suitable cleaner?
I read that phosphoric acid (toilet limescale remover) should do the job without damaging the tiles but I would welome an expert opinion.
Thanks
 

Reply to What are these marks, can I clean and prevent in the Tile Cleaning and Restoration Forum area at TilersForums.com

New Threads (Sitewide)

Top Bottom

Use TilersForums.com to find Tiling Jobs or your Local Tilers for free. Get tiling tools at the best prices via the forum.