Hi all
I laid a full patio with black limestone last October on a full layer of concrete. I didn't use grout and used joint it simple. Brushed it in then soaked it.
From day 1 the patio had a silver grey look and never looked black.
I was advised not to seal for 12 weeks and to make sure it was dry. Not easy living in Cumbria. However a month ago I decided to power wash it with a mild non acid detergent. After drying I was left with several horrible white stains as shown in the pictures. Can anybody advise me how to remove these stains as scrubbing them doesn't work. Or if I now seal them will the white disappear. Thanks
I laid a full patio with black limestone last October on a full layer of concrete. I didn't use grout and used joint it simple. Brushed it in then soaked it.
From day 1 the patio had a silver grey look and never looked black.
I was advised not to seal for 12 weeks and to make sure it was dry. Not easy living in Cumbria. However a month ago I decided to power wash it with a mild non acid detergent. After drying I was left with several horrible white stains as shown in the pictures. Can anybody advise me how to remove these stains as scrubbing them doesn't work. Or if I now seal them will the white disappear. Thanks