Project Name
Project Number
TEMF
Statement of Work
UFC 4-214-02, 24 Jul 03
CHAPTER 7
THERMAL PERFORMANCE
7-1
THERMAL CHARACTERISTICS. Building construction shall conform to the
requirements of ASHRAE 90.1-2001. The R and U values shall be calculated in accordance
with ASHRAE methods.
7-2
THERMAL INSULATION.
7-2.1
Characteristics. Thermal insulation shall have a flame-spread rating and a smoke-
development rating in accordance with IBC requirements. A vapor barrier shall be provided
on the warm-in-winter side of exterior wall and ceiling insulation, except in humid areas as
defined below. Polyurethane is allowed as an insulation material for slabs and outside concrete
or unit masonry walls. It is prohibited as an injected insulation material in walls or floor cavities
or within the building envelope.
7-3
HUMID AREA DESIGN. [Climates which have 3000 hours or more of 19.4 degrees
C or higher wet bulb temperature in combination with an outside design condition of 50 percent
or higher relative humidity, or climates which have 1500 hours or more of 22.8 degrees C or
higher wet bulb temperature in combination with an outside design condition of 50 percent or
higher relative humidity shall be considered humid areas. In other areas that do not meet the
strict definitions of a humid area but experience humid conditions on numerous occasions,
these same criteria shall be used by the designer as appropriate for the facility and the climate].
An effective infiltration barrier is critical to limiting moisture flow into occupied spaces. In humid
areas, interior surfaces of ceilings and exterior walls shall be covered with materials which allow
escape of water vapor from inside the walls into the conditioned space to prevent the growth of
mold on interior surfaces. The vapor barrier in humid areas shall have a maximum perm rating
of 0.5, and shall be located on the outside face of the exterior wall or ceiling insulation.
7-4
INFILTRATION. To limit air infiltration (especially in humid areas), the core areas
within TEMFs will be sealed with an air infiltration barrier, installed in accordance with the
manufacturer's recommendations. The core area envelope shall be caulked, gasketed,
weatherstripped or otherwise sealed: around window and door frames, between wall cavities
and frames, between walls and ceiling and roof, between walls and floors, at access doors and
panels, at utility penetrations through walls, floors, and roofs, and at any other exterior envelope
joint which may be a source of air leakage. These steps shall constitute tight building
construction.
SOW-74
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