Masonry Magazine August 2001 Page. 30
the fom
company
Call The FOM Company, Ltd. for THE BEST foam core fill insulation for cmu's.
The Best R-Value...
The Best Pricing...
The Best Coverage...
AND
The Best Contractors!
For Information on Joining our National Network of FOM Insulation Contractors, CALL 1-877-381-1200 or write The FOM Company, Ltd., 1920 S. Main Street, Akron, OH 44301, www.thefomcompany.com
The FOM Company is proud to be a member of the Masonry Institute and The Mason Contractors Association of America.
MASONRY RESTORATION SET
OUR MORTAR REMOVAL SET INCLUDES:
Trow & Holden "Type B" short stroke air hammer with 1" piston"
10' air hose assembly with all hardware installed, including Staubli push-button Quick-Connect
Mortar removal chisels (4)
1/8" and 1/4" carbide cape chisels,
4-tooth carbide ripper, 1/4" steel swept cape chisel (chisels also avail. in thicknesses starting at 1/32")
Tool pouch and literature on tool use
EVERYTHING YOU NEED TO GET STARTED FOR A SPECIAL PRICE $449
"Use with 5 HP compressor
MADE TO LAST IN BARRE, VERMONT
TROW & HOLDEN COMPANY
45 SOUTH MAIN ST., BARRE, VT 05641
IN VERMONT CALL 802-476-7221
OUT OF STATE CALL 1-800-451-4349
HOW TO APPLY PROTECTIVE TREATMENTS
First, evaluate the substrate. Is it dense? Or porous? If it's natural stone, is it calcareous like limestone or marble? Or silicious, like sandstone and granite?
Knowing the substrate is important for choosing the right protective treatment. A treatment made for dense surfaces might not perform to spec on a porous surface. What works on sandstone or brick might not be best for limestone or concrete.
Before you apply the treatment, the surface must be clean, dry and absorbent. Contaminants on the surface may interfere with penetration and bond. If you plan to clean first, check with the manufacturer to ensure the cleaner and protective treatment that follows are compatible. Knowing the substrate is important for choosing the right protective treatment. Never clean with muriatic acid!
Fix cracks, defects and open joints before applying protective treatments. They can make the masonry water-repellent, but they can't fill holes or openings.
Apply with brush, roller or low-pressure spray. Procedures may differ slightly based on whether the surface is horizontal or vertical. But the principle stays the same: uniformly saturate the surface.
Avoid:
1. When spraying, don't atomize the liquid. Set the sprayer for wet stream and apply at about 20 psi.
2. Don't apply in extreme temperatures or in wind. Between 40°F and 95°F is generally acceptable. Colder or hotter can freeze or evaporate the treatment, affecting penetration and performance.
Also, most penetrating water repellents are not for below-grade use or for use under hydrostatic pressure.
WATER IS NOT THE ONLY FOE
Though water poses the biggest danger to masonry, there are other threats. Winter deicing salts, graffiti, oil, and food can all disfigure or damage expensive masonry. Fortunately, there are penetrating, breathable treatments to protect against these too.
30 MASONRY AUGUST, 2001