Specifications - State of Delaware

SECTION 072100 - THERMAL INSULATION: continued
B. Install roof insulation over metal decking in accordance with manufacturer's recommendations
and in compliance with FM 1-28 requirements for FM 1-90 windstorm classification.
C. Install insulation with panel length parallel to eave/ridge.
D. Install insulation boards with end joints staggered minimum 24 inches in successive panel
rows.
1. Butt edges with 1/8 inch gaps for expansion and contraction.
2. Bear edges of insulation board on metal deck ribs.
3. Position insulation boards so that panel joints do not align with joints in metal decking.
E. Mechanically attach insulation panels to metal roof decking using mechanical fasteners
meeting FM 1-90 windstorm classification. Fasten panels through spacer strips and in
fastening patterns complying with windstorm classification requirements and manufacturer's
recommendations.
F. Cover panels with minimum 15# roofing felt attached with corrosion resistant roofing nails.
G. Do not permit construction of fascia to block or obstruct air circulation path.
H. Do not leave installed insulation exposed to the weather. Cover with subsequent roofing
materials immediately following insulation installation.
I. Seal exposed insulation edges at end of each work period. Remove edge seals when work
resumes.
3.06 INSTALLATION OF INSULATION FOR CONCRETE SUBSTRATES:
A. Install board insulation on concrete substrates by adhesively attached, spindle-type insulation
anchors as follows:
1. Fasten insulation anchors to concrete substrates with insulation anchor adhesive
according to anchor manufacturer's written instructions. Space anchors according to
insulation manufacturer's written instructions for insulation type, thickness, and
application indicated.
2. Apply insulation standoffs to each spindle to create cavity width indicated between
concrete substrate and insulation.
3. After adhesive has dried, install board insulation by pressing insulation into position over
spindles and securing it tightly in place with insulation-retaining washers, taking care not
to compress insulation below indicated thickness.
4. Where insulation will not be covered by other building materials, apply capped washers
to tips of spindles.
3.07 LIQUID APPLIED VAPOR BARRIER:
A. Surface preparation:
1. Surfaces shall be free of contaminants such as grease, oil and wax on surfaces to receive
membrane.
2. The concrete masonry surfaces shall be free from projections.
3. Strike mortar joints full and flush to face of concrete block.
4. Fill voids and holes greater than 1/2 inch across with mortar or non-shrink grout.
5. Fill cracks, gaps and joints exceeding 1/4 inch width with mortar or non-shrink grout.
6. Grind flush or make smooth surface irregularities exceeding 1/4 inch in height or sharp to
touch.
7. Fill around penetrations with mortar, sealant or other approved fill material and strike
flush.
8. If surfaces cannot be made smooth to the satisfaction of the Contracting Officer, it will be
the responsibility of the trade to alternatively apply a parge coat (typically one part
cement to three parts sand) over surface to receive fluid-applied membrane air barrier.
072100-6 DEAN072100.DOC