Article Number: 283 | Rating: Unrated | Last Updated: Mon, Oct 26, 2015 at 4:15 PM
Q: Hi. I recently had a patio laid in natural
sandstone and my builders used a cement coloring in the pointing. When wiping
down with wet sponges, they have left stains on the sandstone. What do you
there anything we can do? Builders are talking about sanding it down. The dye
used was a brown color which is darker than the stone (Ivory). You can see the
sponge wipes across the stone.
A: Based on the pictures
you sent and the information provided, it looks as though the grout has stained
the tile. The builders can try honing the tile to see if this will remove the
dye, or a grout cleaner may do the trick, however,
if the discoloring is too deep, it will be very difficult to remove. We would
recommend calling a professional stone restoration company to conduct testing
to see if it can be restored.
CEMENT A hydraulic mixture, without aggregate, consisting of a calcined mixture of clay and pulverized limestone
GROUT A mixture of cement material and aggregate to which sufficient water is added to produce pouring consistency without segregation of the constituents
POINTING The final filling and finishing of mortar joints that have been raked out
RESTORATION Work performed, including cleaning, repair, and finishing, returning the stone to its original character, finish, and condition
SANDSTONE Arenaceous sedimentary rock composed mainly of quartz with feldspar as a possible minor component. Sandstones are clastic in origin (opposed to organic or chemical) and the binding agents are mostly calcite, clay and silica. See quartz-based stone
TILE A thin modular stone, generally less than ¾ inch thick
Posted - Mon, Oct 26, 2015 at 4:13 PM This article has been viewed 1074 times.
Filed Under: Care and Maintenance
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