Can I use
a steam cleaner on my natural stone floors?
By Frederick M. Hueston, www.stoneforensics.com
I am often asked if I can use a steam cleaner on my natural
stone floors. Steam cleaning is a very effective cleaner removing soil and containments
without harsh chemicals. However, on natural stone such as marble, granite and
other natural stone it can be harmful.
Since most stone is porous, the high temperature of steam
cleaning can cause pressure within the stone which can lead to a condition
known as spalling. Spalling is pitting and/or flaking of the stone. In addition
if the stone is sealed it can remove any sealer present. If the stone has any cracks the steam can
cause them to expand and open up. Grout can also be damaged by continued use of
steam cleaning if used regularly.
If your using a home type steam cleaner it may be ok to use
on natural stone since these steam cleaners do not reach the temperature that a
commercial steam cleaner. Home style steam cleaner range in temperature about
250 degrees F whereas commercial steam cleaners can reach temperature o f over
300 degrees F. However, these steam cleaners should not be used regularly.
There are several types of steam cleaners
Vapor steam cleaners
These cleaners look like a canister vacuum. They emit a fog
of steam vapor to the surface with a wand. The temperature can reach over 200
degrees F
Steam Mops
Steam mops inject steam into a cloth mop that is used to mop
the floor. Generally these are safer to use on natural stone since the
temperature on the mop are less than the vapor types. They are also a good
alternative to harsh chemicals.
Handheld Steam Cleaner
Handheld steam cleaners are simple to use and are good for spot
cleanup and for other areas. I really don’t see a need to use these type
cleaners on stone countertops or shower walls.
I would recommend that you use a neutral stone cleaner or
have them professional cleaned to be on the safe side.
