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BITUMINOUS FLASHINGS |
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8.13.8 For large areas, use a
notched trowel. Spread the MBR Utility Cement evenly, about 1/8 " (3 mm) thick
(no greater than ¼ " [6 mm]), working down firmly to ensure even coverage and good
adhesion to the substrate. The JM APP flashing membrane material is then embedded into the
cement and brushed or rubbed to make full contact and to ensure adhesion. Take special
care not to contaminate the seams with the adhesive. The seams are then heat welded. After
heat welding the seams are rolled with a rounded edge roller to create a minimum ¼ "
(6 mm) bleed out of the APP compound. Check all seams for adhesion.
8.13.9 The average coverage is 8
gallons/100 sq. ft. (3.3 liters per square meter), per ply.
8.13.10 Nail or mechanically fasten the
modified bitumen sheet as prescribed in the appropriate flashing specification.
8.13.11 All exposed nail heads must be
covered with a layer of MBR Utility Cement.
8.13.12 Tools and equipment can be cleaned
with mineral spirits.
8.14 Surfacing
8.14.1 JM requires that smooth surface APP
flashing membrane
materials be
coated with an approved JM roof coating such as TopGard Type A, TopGard Type B, or
Fibrated Aluminum Roof Coating.
Hot bitumen is not an acceptable coating.
8.14.2 It is not necessary to apply a
surfacing to a granulated APP
flashing membrane material. These materials are manufactured with integral ceramic
granules that protect the underlying bitumen from the elements.
