[3.5.2.1
Manufacturer's Inspection
**************************************************************************
NOTE: Include this paragraph when manufacturer's
inspection of work is required. Select desired
frequency of manufacturer inspection and coordinate
with text of optional 2nd and 3rd bracketed sentences.
**************************************************************************
Manufacturer's technical representative shall visit the site a minimum of
three [_____] times [once per week] during the installation for purposes of
reviewing materials installation practices and adequacy of work in place.[
Inspections shall occur during the first 20 squares of membrane
installation, at mid-point of the installation, and at substantial
completion, at a minimum. Additional inspections shall not exceed one for
each 100 squares of total roof area with the exception that follow-up
inspections of previously noted deficiencies or application errors shall be
performed as requested by the Contracting Officer.] After each inspection,
a report, signed by the manufacturer's technical representative shall be
submitted to the Contracting Officer within 3 working days. The report
shall note overall quality of work, deficiencies and any other concerns,
and recommended corrective action.
]3.5.3
Samples of Roofing
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NOTE: This requirement is included for optional
enforcement at the discretion of the Contracting
Officer. It is not the intent to require cut
samples on all roof projects.
**************************************************************************
Take 100 mm by 1000 mm (4-inch by 40-inch) cut samples across width of
modified bitumen sheets as directed by the Contracting Officer. Cut
samples will be examined by the Contracting Officer for specified number of
plies, proper lap width, complete lap seal, full uniform adhesive compound
application and adhesion, full bond between plies, harmful foreign
materials, presence of moisture, and wet insulation. Where cuts are not
retained by the Contracting Officer or disposed, set cut strip back in cut
area in bed of modified bitumen cement. Repair area of cut with new
minimum two-ply modified bitumen membrane patch.
3.5.4
Roof Drain Test
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NOTE: Include this paragraph when roof drains are
required. Consult with structural engineer to
verify loading capability of roof structural system.
**************************************************************************
After completing roofing but prior to Government acceptance, perform the
following test for watertightness. Plug roof drains and fill with water to
edge of drain sump for 8 hours. Do not plug secondary overflow drains at
the 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 installation; repair or replace roofing at drain to provide for a
properly installed watertight flashing seal. Repeat test until there is no
SECTION 07550
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