Project Name
Project Number
UEPH Complex
Statement of Work
26 November 2001
CHAPTER 7
THERMAL PERFORMANCE
7-1
THERMAL CHARACTERISTICS. Building construction shall conform to the current
version of ASHRAE 90.1. All buildings shall be classified as non-residential. 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 of 25 or less
and a smoke-development rating of 50 or less, exclusive of the vapor barrier, when tested in
accordance with ASTM E84. 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 [67
degrees F] 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 [73 degrees F] 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), buildings will be
sealed with an air infiltration barrier, installed in accordance with the manufacturer's
recommendations. The building 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-117
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