[2.6
WALKPADS
Breathable material as recommended by the roof system manufacturer, minimum
1.0 m by 1.2 m (3 ft by 4 ft).
]2.7
TRAFFIC AREA FABRIC
Fabric shall be ASTM D 579, style 1620[, or non-woven polyester as approved
by the roof material manufacturer].
2.8
INSPECTION TOOLS
Maintain the following inspection tools on site for use in evaluating
conditions and quality:
a.
Moisture meter - to measure degree of moisture within or on the
substrate surface.
b.
Sling Psychrometer and psychrometric chart, or electronic psychrometer
or hygrometer - to measure ambient temperature, humidity and dew point.
c.
Surface thermometer - to read temperature of a surface.
d.
Optical comparator - to read dry film thickness.
e.
Magnifying glass, minimum 75 mm (3 inch) - to inspect surface
conditions.
f.
Wet film thickness gauge - read wet film thickness.
g.
Probe wire (0.025 inches diameter, maximum) - to inspect foam depth.
PART 3
EXECUTION
3.1
PROTECTION OF PROPERTY
Protect the building structure, equipment, and other surfaces adjacent to
the work from overspray from foam and coating materials. Protective
coverings shall be secured and vented to prevent collection of moisture on
covered surfaces. Use protective shields or barriers when spraying along
open roof edges and walls to prevent uncontrolled overspray. Any surfaces
damaged by roof system products shall be restored or replaced to the
satisfaction of the Government at no additional expense to the Government.
3.1.1
Masking
Provide masking protection to protect surfaces immediately adjacent to foam
and coating terminations at time of application. Adjust or provide new
masking protection at roof perimeter to protect surfaces immediately
adjacent to coating terminations and to provide for clean smooth coating
termination lines.
[3.1.2
Warning Signs
Post warning signs at ground level in the adjacent to the work area and a
minimum of 150 feet from the application area stating the area is off
limits to unauthorized persons and warning of potential overspray hazard.
Place clearly visible and legible warning sign at entrance to primary road
SECTION 07570
Page 28
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