Installation Instructions

Installation Instructions
CI MAX
™
Insulation for Exposed Interior Use
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Fasten CI Max Insulation Directly to the Wall
1. Fasten CI Max insulation boards to the interior of the wall
using power-driven masonry nails with 1½-inch minimum
metal washers or caps, or other suitable masonry fastener.
For crawl space wall installation, CI Max insulation should
be installed horizontally (as shown in Figure 1). For basement
installations, CI Max insulation can be installed either
vertically or horizontally.
2. Space fasteners approximately 24 inches on center across
the short board dimension and 48 inches on center across
the long board dimension.
3. Butt board edges together tightly and carefully fit around
penetrations. CI Max foam sheathing may be installed and
left exposed without joint treatment. However, tape may be
installed to reduce air leakage using aluminum or white foil
tape that has a flame spread of 25 or less and a smoke
development of 450 or less.
Fasten CI Max Insulation over Furring Strips
1. Install wood or pressure-treated wood furring strips,
preferably spaced not more than 24 inches on center. Furring
strips may be installed with power-driven masonry nails.
2. Install CI Max board over furring strips. Butt board edges
together tightly, align seams over furring strips, and carefully fit
around openings and penetrations. CI Max foam sheathing may
be installed and left exposed without joint treatment. However,
tape may be installed to reduce the air leakage of the wall
system using aluminum or white foil tape that must have a flame
spread of 25 or less and a smoke developed index of 450 or less.
3. Fasten insulation boards to the furring strips using screws or
roofing nails with a 1½-inch minimum metal washer or top
cap. Alternate fasteners may be used, with the type and
length as recommended by their manufacturer for securing
foam plastic insulating sheathing.
Table 1:
Insulation Thickness Masonry Screw Length
½”
.77”
1"
1”
1½"
1½”
1½" 2"
2” 2½"
2½" 3"
3" 3½"
3½" 4"
4" 4½"
Special Order Thickness Thickness + ½"
The following installation recommendations relate to the
installation of CI Max Polyisocyanurate Foam Sheathing in an
exposed condition on the interior of a building. CI Max foam
sheathing is designed to be installed in the applications
described below without the addition of a thermal barrier.
General
1. CI Max foam sheathing is not a structural material. It must
not be used as a nailing base for any other building products.
2. CI Max foam sheathing passed NFPA 286 corner burn test for
walls only or ceiling only without joint treatment. Boards
need to be tightly butted. Taping the seams is acceptable
with tapes that have a flame spread index of 25 or less and a
smoke developed index of 450 or less.
3. All framed walls insulated with CI Max foam sheathing must
be properly braced for lateral loads according to local
building codes.
4. Consult local building codes and authorities regarding
special applications or details required when using CI Max
foam sheathing as an exposed product.
5. The interior and/or exterior of the building should be
protected with a suitable vapor retarder and/or air barrier/
weather resistive barrier, based on local building codes and
climate zone.
6. Repair any boards damaged during installation. Patch holes
less than one inch across with seam tape. Patch holes
greater than one inch across with matching board material
and then seal with flashing tape that have a flame spread of
25 or less and a smoke development of 450 or less.
Masonry Walls
• CI Max foam sheathing may be installed to the interior of
masonry walls, including above-grade masonry and tilt-up
walls and below-grade basement and crawl space walls.
• All walls should already have air/water/vapor barriers
installed prior to installation of CI Max foam sheathing.
• Below-grade applications may require additional materials to
effectively manage water, water vapor and/or radon.
• Some below-grade applications may require a two- to three-
inch inspection strip along the top of the foundation wall for
termite mitigation. Always adhere to local building code or
pest control requirements.
Concrete Block
CI Max
Insulation
Vapor Retarder
Masonry Fasteners
THERMAL VALUES*
Thickness (in) mm R-value**
0.50 13 3.3
0.77 19 5.0
1.00 25 6.5
1.55 39 10
2.00 51 13.0
THERMAL VALUES*
Thickness (in) mm R-value**
2.5 64 16.3
3.0 76 19.5
3.5 89 22.8
4.0 101 25.0
2.0 51 13.0
THERMAL VALUES*
Thickness (in) mm R-value**
0.50 13 3.3
0.77 19 5.0
1.00 25 6.5
1.55 39 10
2.00 51 13.0
THERMAL VALUES*
Thickness (in) mm R-value**
2.5 64 16.3
3.0 76 19.5
3.5 89 22.8
4.0 101 25.0
2.0 51 13.0
Figure 1. CI Max boards mechanically fastened