requirements of 40 CFR 247 and Section 01670 which
should be included in all projects.
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Contractor shall comply with EPA requirements in accordance with Section
01670 RECYCLED / RECOVERD MATERIALS. The polyurethane or polyisocyanurate
foam shall have a minimum recovered material content of [_____] percent by
weight of the core material.
2.15.2
Insulation Adhesive
Insulation adhesive shall be specifically prepared to adhere the insulation
to the masonry and, where applicable, to the thru-wall flashing. The
adhesive shall not deleteriously affect the insulation, and shall have a
record of satisfactory and proven performance for the conditions under
which to be used.
2.16
EXPANSION-JOINT MATERIALS
Backer rod and sealant shall be adequate to accommodate joint compression
equal to 50 percent of the width of the joint. The backer rod shall be
compressible rod stock of polyethylene foam, polyurethane foam, butyl
rubber foam, or other flexible, nonabsorptive material as recommended by
the sealant manufacturer. Sealant shall conform to Section 07920 JOINT
SEALANTS.
2.17
FLASHING
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NOTE: Require flashing in exterior masonry walls,
including single-wythe construction, at all
obstructions such as bond beams, sills, lintels, and
concrete tie beams. The wall design and detailing
must conform to National Concrete Masonry
Association (NCMA) publications: TEK 13A, "Details
for Building Dry Concrete Masonry Walls"; TEK 53,
"Design of Concrete Masonry for Crack Control"; TEK
126, "Flashing Concrete Masonry"; BIA Technical
Notes 7 for water penetration, resistance; and BIA
Technical Notes 18A for crack control. Show
locations and details on project drawings. This is
a regional requirement which shall be used, when
applicable, for SOUTHNAVFACENGCOM projects; when
appropriate, the requirements may be used for
projects in other areas.
Reinforced membrane flashing should only be an
option for residential construction. Do not use
polyester film flashing on any other type
construction projects.
Copper may stain masonry and deteriorate in high
chloride environments.
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Flashing shall be as specified in Section 07600 FLASHING AND SHEET METAL.
Provide one of the following types [except that flashing indicated to
terminate in reglets shall be metal or coated-metal flashing] [and] [except
that the material shall be one which is not adversely affected by
SECTION 04200
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