Masonry Magazine August 2014 Page. 21
MAS5308_August2014_MAS 7/22/14 9:41 AM Page 19
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Cultured stone isn't brick, and it can't be deaned as if itwere. Not only must you consider what the stone is comprised of, but you need to factor in timing, your water source, the integrity of the coloring, the deaning agent and method, and more.
To get a good read on the basics for deaning manufactured stone, Masonry con�sulted three experts in this field. We sat down with Ronald W. Baer, president of
Ron Baer: Kem-0-Kleen, a company that has manu�factured equipment for masonry cleaning for more than 40 years; Jeremy Douglas, CSI, CCPR, director ofarchitectural services for Hohmann & Barnard, who has more than 15 years ofexperience in the masonry industry in addition to working with other various wall systems; and Al Morris, nation�al sales manager for PROSOCO, who has been involved in the deaning, coating and restoration industry for thelast20 years. Fol�lowing is what they had to say.
Jeremy Douglas
Masonry: Discuss the timing of cleaning different types ofmanu�factured stone projects.
Ron Baer: The major instruction for manufactured stone is to follow instruc�tions -instructions for installation, for using a cleaner, and for maintenance.
Jeremy Douglas: Timing is critical in cleaning newly laid manufactured stone, Al Morris because you'll need to make certain the
mortar doesn't cure and harden beyond a point at which its removal is ineffective. Yet, the mortar also needs enough time to cure, so its color and texture are largely unaffected I think the best practice is to ensure any of the larg�er mortar tags are removed during the installation process, and then try to clean the leftover residues between seven and 14 days after installation.
Al Morris: You always want to clean a substrate as soon as possible. The longer you wait, the harder the mortar gets. This makes it more difficult to remove, which would lead using harsher cleaning techniques. This could cause the manufac�tured stone to be damaged.
Masonry:Bow does the integral nature ofthe col�oring affect the way a manufactured stone is cleaned?
Baer: Manufactured stone veneer typically will be installed on a vertical sub-surface with a cement mortar mix. Care should be taken to keep excess mortar from coming into con�tact with the face of the finished stone. If excess mortar does
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August 2014 � MASONRY 19
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