About 3 months ago I ago i had my front garden replaced with large paving stones, and on one or two of the are large chalky white marks have appeared on some of the stones Wanting to know what they are? and how can I remove? them hopefully never to return !!!
2006-06-07 08:55:56 · 5 answers · asked by fisher 2006 1 in Home & Garden ➔ Garden & Landscape
It's most likely calcium leaching out of them. You'll notice the same thing pretty much happens to brick on some homes. Some water and a stiff brush should do the trick, but you may find that it will reappear a few more times.
2006-06-07 09:19:08 · answer #1 · answered by devilishblueyes 7 · 0⤊ 0⤋
May be many things. Do you have an irrigation system that is hitting just these stones? Could be calcium building up. If the stones were very recently poured or manufactured could it be limestone coming from the mixture?
2006-06-07 08:59:43 · answer #2 · answered by cranesroost 1 · 0⤊ 0⤋
It could be calcium deposits leeching out, or it could be bird crap. Just use water and a stiff brush. it should come off fairly easily.
2006-06-07 08:59:03 · answer #3 · answered by Anonymous · 0⤊ 0⤋
That's mold. Go to your hardware store and ask them.
2006-06-07 08:58:10 · answer #4 · answered by cyanne2ak 7 · 0⤊ 0⤋
pressure washer
2006-06-07 08:59:17 · answer #5 · answered by woundshurtless 4 · 0⤊ 0⤋