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Replies
Hi Michael
It's not just the pointing mix that's causing the problem, its a combination of cement, dust from cutting, sand and all the general grime settling onto the surface of the stone. It will settle down after a month or so but if you cant wait that long you always use chemicals. A light acid wash would be ok with Indian Sandstone.
What's your current method of pointing?
Also, the problem you have mentioned would effect most types of stone, not just Indian.
Steve
Hi steve, cheers for getting back to me. My method has always been a 3:1 sand cement that is damp enough to point with, we never use a 'dry mix' we would go along each joint carefully keeping all mortar in the joints, then compacted and smoothed with iron, then with a dry soft brush I will sweep any excess ( I believe this is what causes the sandy afterlook ) Last couple of jobs I have opted for brush in compound by marshalls but can workout expensive over some of our bigger jobs. I will look into the acid wash steve and let you know how I get on. I really want to aim for a perfect finish and so far the brush in gear has been the answer.
Cheers,
Michael.