I have three solid slabs (10" thick approx) of slat that is my front steps. The slate is flaking away on the top layer, the house is about 75 years old and the steps have been there that long (we were told) they are in good shape and I pressure washed the algae off today, so they look nice. But as I said they are flaking, is there a way I can stop this process, I believe that it is cause by freezing and thawing of water. So I am assuming that if I were to "seal" it maybe that would help?
Thanks for any help
Searcher