Specifications - Lord and Son Construction, Inc.

c. Insulation shall be impaled on the fasteners; self-locking washers
shall be installed and the pin trimmed and bent over.
d. Joints in the insulation jacket shall be sealed with a 4 inch wide
strip of tape. Tape seams shall be sealed with a brush coat of vapor
retarder coating.
e. Breaks and ribs or standing seam penetrations in the jacket
material shall be covered with a patch of the same material as the
jacket. Patches shall extend not less than 2 inches beyond the break
or penetration and shall be secured with tape and stapled. Staples and
joints shall be sealed with a brush coat of vapor retarder coating.
f. At jacket penetrations such as hangers, thermometers, and damper
operating rods, the voids in the insulation shall be filled and the
penetrations sealed with a brush coat of vapor retarder coating.
g. Insulation terminations and pin punctures shall be sealed and
flashed with a reinforced vapor retarder coating finish. The coating
shall overlap the adjoining insulation and un-insulated surface 2
inches. Pin puncture coatings shall extend 2 inches from the puncture
in all directions.
h. Oval and round ducts, flexible type, shall be insulated with
factory Type I jacket insulation with minimum density of 3/4 pcf,
attached as in accordance with MICA standards.
3.3.3 Insulation for Warm Air Duct
Insulation and vapor barrier shall be provided for the following warm air
ducts and associated equipment:.
a. Supply ducts.
b. Return air ducts.
c. Relief air ducts
d. Flexible run-outs (field insulated).
e. Plenums.
f. Duct-mounted coil casings.
g. Coil-headers and return bends.
h. Coil casings.
i. Fresh air intake ducts.
j. Filter boxes.
k. Mixing boxes.
l. Supply fans.
Section 23 07 00 Page 28