The R-value of impermeable faced (ex. aluminum
foil)
polyisocyanurate components will be calculated
using
the aged R-value of 1.27 square meter k/w ("R"
value
7.2) per 25 mm (1 inch) of thickness; k = 0.24
W/m.k
(k = 0.14).
Delete foil-faced board when roofing is single-ply
and fully adhered. Delete polystyrene and
polystyrene composite when insulation will be
applied with hot asphalt.
The recovered materials content levels specified
below are based on the weight (not the volume) of
the materials in the insulating core, excluding
skins or facings.
Insulation shall be a standard product of the
manufacturer and shall be factory marked with the
manufacturer's name or trade mark, the material
specification number, the R-value at 24 degrees C,
75 degrees F, and the thickness. Minimum thickness
shall be as recommended by the manufacturer. Boards
shall be marked individually. The thermal
resistance of insulation shall be not less than the
R-value shown on the drawings. The insulation
manufacturing process shall not include chlorofluoro
carbons (CFC) in conformance with Section 01670
RECYCLED/RECOVERED MATERIALS. Insulation shall be
one, or a combination of the following materials:
**************************************************************************
Roof insulation shall be one or an assembly of a maximum of three of the
following materials and compatible with attachment methods for the
specified insulation and roof membrane:
**************************************************************************
NOTE: Detailed information concerning EPA
requirements on recycled/recovered materials is
available at the following URL's:
http://www.epa.gov/cpg/products/ and then click on
the appropriate item from the list (building.htm for
building insulation, for example).
http://www.epa.gov/cpg/products.htm (similar
results).
http://www.gov/cpg/pdf/back.pdf which opens up
EPA530-R-98-003 (dated July, 1998, titled BACKGROUND
DOCUMENT FOR PROPOSED CPG III AND DRAFT RMAN III).
Using data from listed locations, fill in blank
space (below and in subsequent paragraphs) for
required percentage of recycled or recovered
material. This is in accordance with the
requirements of 40 CFR 247 and Section 01670 which
should be included in all projects.
**************************************************************************
a. Expanded Perlite Board: ASTM C 728. Minimum 19 mm 3/4 inch thick
when both top and bottom surfaces will be in contact with asphalt.
SECTION 07220
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