corrected and approved by the Contracting Officer. Where cuts are not
retained by the Contracting Officer or disposed, set cut strip back in cut
area and patch as specified.
3.5.3.1
Number of Cut Tests
Cut samples shall be taken as directed by the Contracting Officer for
quality assurance validation or as necessary to determine the extent of
deficiencies discovered in the construction. Except where cut samples are
taken to investigate deficiencies, no more than two cut samples per 1000
square meters (100 squares) or one cut sample from each day's work shall be
required.
3.5.3.2
Sample Cutting Device
Provide a rectangular, 100 mm by 1000 mm (4-inch by 40-inch template and
300 mm by 300 mm (12 inch by 12 inch) template, of a type that will permit
accurate cutting of samples with standard roofing knives. Keep cutting
edge of knife clean by washing in solvent after each cut.
3.5.3.3
Patching Cut-Out Area
Immediately after inspection, replace cut-out sample. When sample is
needed for laboratory analysis or other circumstance makes it unavailable,
substitute a new section of equivalent size and structure. For
non-nailable decks, replace sample in hot asphalt. For nailable decks,
insert one ply of ply felt into opening from which sample was taken and
sprinkle nail to hold in place; coat felt heavily with asphalt roof cement
and press cutout sample firmly into asphalt roof cement. Repair area of
cut with new patch of the same number of plies as the primary roof
membrane. Extend the first ply minimum 150 mm (6 inches) all around the
cut area. Extend each additional ply minimum 100 mm (4 inches) beyond the
previous ply.
[3.5.4
Roof Drain Test
**************************************************************************
NOTE: Include this paragraph when roof drains are
required. Consult with structural engineer to
verify loading capability of roof structural system.
**************************************************************************
After roofing system is complete except for surfacing, perform the
following test of roof drains and adjacent roofing for watertightness.
Plug roof drains and fill with water to edge of drain sump for 8 hours. Do
not plug secondary overflow drains at same time as adjacent primary drain.
To ensure some drainage from roof, do not test all drains at same time.
Measure water at beginning and end of the test period. When precipitation
occurs during test period, repeat test. When water level falls, remove
water, thoroughly dry, and inspect the installation. Repair or replace
roofing at drain to provide for a properly installed watertight flashing
seal. Repeat test until there is no water leakage.
][3.6
INFRARED INSPECTION
**************************************************************************
NOTE: This optional requirement should be included
only under special circumstances and on roof systems
conducive to effective infrared scanning, or as
SECTION 07511
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