External black limestone question

[iah1980]

Hi, was hoping someone could help. This is my first post, so apologies for asking a question straight away. Basically I have been laying a black limestone patio. There was some dust on the slabs and I washed it off with a sponge and tap water, however, it has now left grey marks on the slabs i washed. I have attached (I hope) a picture of the patio, which is unfinished as I want to understand what has happened before finishing and sealing. If anyone could help it would be appreciated. thanks Ian

 

[White Room]

When you cleaned the slabs/tiles did you clean the sponge regurlaly, try washing again but rinse the sponge after a single sweep across the tiles....

 

[DHTiling]

Hi, was hoping someone could help. This is my first post, so apologies for asking a question straight away. Basically I have been laying a black limestone patio. There was some dust on the slabs and I washed it off with a sponge and tap water, however, it has now left grey marks on the slabs i washed. I have attached (I hope) a picture of the patio, which is unfinished as I want to understand what has happened before finishing and sealing. If anyone could help it would be appreciated. thanks Ian

Black Indian limestone. Use a cleaner such as universal ultimate clean .. This will remove surface contaminants like you have .. Once clean then I recommend a colour enhancer.

Always follow the instructions of each product you use..