color as indicated. Provide wall lights of the same configuration as the
metal wall panels.
2.3.15
Insulation
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NOTE: Heat is transferred through walls and roofs,
and is either gained or lost, depending on whether a
building is experiencing summer or winter
conditions. Along with heat transfer concepts,
moisture transfer concepts must be considered. In
cold climates moisture migration can create a
problem due to condensation. It is important to
remember that drawings must show type, extent, and
location of insulation. The vapor retarder location
is dependent on the climate as noted in paragraph
VAPOR RETARDER.
The required R-value for the insulation will be
determined and shown at the appropriate details on
the drawings. The required R-values for the
insulation will never be less than the R-values used
in the Energy Budget Analysis. The R-values shown
on the drawings should be greater than those used in
the design analysis to account for thermal bridges.
Provide about a one-third increase (or as local
experience has shown, if different) in R-value over
what is calculated; that is, if an R-value of 3 is
needed in metric (metric units are square meter K/W)
(16 in I-P with units of h x square feet x degree
F/Btu) use an R-value of 4 (21) in the contract. If
an analysis of thermal bridges in the design gives a
requirement greater or less than this, it should be
used.
Flame spread and smoke development ratings of
insulation, to include facing, must comply with the
requirements of MIL HDBK 1008C. Exposed insulation
will be faced, mineral fiber type, only; cellular
plastic insulations will not be exposed.
If prefabricated insulated sandwich panels are used
for siding and roofing, delete this paragraph in its
entirety.
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Thermal resistance of insulation shall be not less than the R-values shown
on the contract drawings. R-values shall be determined at a mean
temperature of 24 degrees C 75 degrees F in accordance with ASTM C 518.
Insulation shall be a standard product with the insulation manufacturer,
factory marked or identified with insulation manufacturer's name or
trademark and R-value. Identification shall be on individual pieces or
individual packages. [Blanket insulation shall have a facing as specified
in paragraph VAPOR RETARDER]. [Roof] [Roof and wall] insulation [,
including facings,] shall have a flame spread not in excess of [_____] and
a smoke developed rating not in excess of [_____] when tested in accordance
with ASTM E 84. The stated R-value of the insulation shall be certified by
an independent Registered Professional Engineer if tests are conducted in
the insulation manufacturer's laboratory. Contractor shall comply with EPA
SECTION 13120
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