1.11
WEATHER LIMITATIONS
Masonry, mortar, and epoxy adhesives shall not be placed when weather
conditions detrimentally affect the quality of the finished product. No
masonry or mortar shall be placed when the air temperature is below 5
degrees C 40 degrees F in the shade. When air temperature is likely to
exceed 35 degrees C 90 degrees F masonry and mortar shall have a
temperature not exceeding 35 degrees C 90 degrees F when deposited.
Materials to be used in the work shall be neither produced nor placed
during periods of rain or other precipitation. Material placements shall
be stopped, and all in-place material shall be protected from exposure,
during periods of rain or other precipitation.
1.12
WARRANTIES
1.12.1
Cleaning Warranty
Cleaning procedures shall be warranted for a period of two years against
harm to substrate (masonry and mortar) or to adjacent materials including,
but not limited to, discoloration of substrate from improper procedures or
usage, chemical damage from inadequate rinse procedures, and abrasive
damage from improper procedures.
1.12.2
Repair Warranty
Repair procedures, including repointing, shall be warranted for a period of
two years against: discoloration or mismatch of new mortar to adjacent
original historic mortar, discoloration or damage to masonry from improper
mortar clean-up, loss of bond between masonry and mortar, fracturing of
masonry edges from improper mortar joint preparation procedures or improper
mortar formulation, and occurrence of efflorescence.
PART 2
PRODUCTS
2.1
MATERIALS
Materials, physical and chemical properties, and composition of masonry and
mortar used in renovation work shall match that of original existing
masonry and mortar to be repaired, unless samples and testing determine
that existing mixtures and materials are faulty or non-performing.
2.2
CLEANING MATERIALS
2.2.1
Paint Removers
Chemical paint removers shall be manufacturer's water soluble, low toxicity
products, effective for removal of paint on masonry without altering,
damaging, or discoloring the masonry surface.
2.2.2
Detergent Cleaners
Detergent cleaners shall be in accordance with [_____].
2.2.3
Ionic Cleaners
2.2.3.1
Alkaline Prewash Cleaner
Alkaline prewash cleaners shall be as recommended by the manufacturer.
SECTION 04900
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