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Technical Information
Polar R and Polar Fold are manufactured with a rigid insulation core and wrapped with tough polypropylene facers which create a durable water resistant board. EPS is a closed cell foam which is highly resistant to heat flow and moisture penetration.
The standard polypropylene film facers are available in white opaque on one side and a metalized film on the other side.
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| Physical Properties |
| Property |
Type
XI |
Type
I |
Type
VIII |
Type
II |
Type
IX |
| Nominal Density |
lb/ft3
(kg/m3) |
0.75
(12) |
1.00
(16) |
1.25
(20) |
1.50
(24) |
2.00
(32) |
| Density1, min. |
lb/ft 3
(kg/m3) |
0.70
(12) |
0.90
(15) |
1.15
(18) |
1.35
(22) |
1.80
(29) |
Design Thermal Resistance
per 1.0 in. thickness |
75ºF |
ºF•ft2•h/Btu (ºK•m2/W) |
3.22
(0.57) |
3.85
(0.68) |
3.92
(0.69) |
4.17
(0.73) |
4.35
(0.77) |
| 40ºF |
ºF•ft2•h/Btu (ºK•m2/W) |
3.43
(0.60) |
4.17
(0.73) |
4.25
(0.75) |
4.55
(0.80) |
4.76
(0.84) |
Thermal Resistance1,min.,
per 1.0 in. thickness |
75ºF |
ºF•ft2•h/Btu (ºK•m2/W) |
3.10
(0.55) |
3.60
(0.63) |
3.80
(0.67) |
4.00
(0.70) |
4.20
(0.74) |
| 40ºF |
ºF•ft2•h/Btu (ºK•m2/W) |
3.30
(0.58) |
4.00
(0.70) |
4.20
(0.74) |
4.40
(0.77) |
4.60
(0.81) |
Compressive strength1
@10% def., min. |
psi
(kPa) |
5.0
(35) |
10.0
(69) |
13.0
(90) |
15.0
(104) |
25.0
(173) |
Flexural strength1,
min. |
psi
(kPa) |
10.0
(69) |
25.0
(173) |
30.0
(208) |
40.0
(276) |
50.0
(345) |
Water Vapor Permeance1
of 1.0 in. thickness,
max., perm |
<1.0 |
<1.0 |
<1.0 |
<1.0 |
<1.0 |
Water Absorption1
by total immersion,
max., volume % |
<1.0 |
<1.0 |
<1.0 |
<1.0 |
<1.0 |
Oxygen Index1
min., volume % |
24.0 |
24.0 |
24.0 |
24.0 |
24.0 |
| Flame Spread2 |
20 |
20 |
20 |
20 |
20 |
| Smoke Developed2 |
150-300 |
150-300 |
150-300 |
150-300 |
150-300 |
1 See ASTM C-578 Standard Specification for complete information
2 See UL Certificate AFM-1 available from R-Control Building Systems
Caution: EPS contains a flame retardant; however, it should be considered combustible and not exposed to sources of ignition
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Termite Resistant
Foam insulation has been shown to become termite infested under certain exposure conditions. Polar R and Polar Fold can be treated to resist the infestation of termites with the Perform guard treatment. Perform Guard is made under a patented process that uses a natural mineral that is formulated to resist termites. This safe EPs regulated additive is thoroughly tested and nontoxic. Consult with ACH for more information.
Weathering
Long-term exposure to sunlight causes yellowing and a slight oxidizing of the surface due to ultraviolet light. This has little effect on mechanical properties. If stored outdoors, cover EPS with light-colored, polyethylene film tarps.
Adhesives, Coatings, and Chemicals
Solvents, which attach EPS, include esters, ketones, ethers, aromatic and aliphatic hydrocarbons and their emulsions. If EPS is to be placed in contact with materials (or other vapors) of unknown composition, pretest for compatibility at maximum exposure temperature.
Flame Retardance/Performance
Although flame-retardants used in manufacturing of Polar EPS cores provide important margins of safety. All EPS products must be considered combustible and should not be exposed to open flame and other sources of ignition. Tests have demonstrated that the products of combustion for EPS are carbon monoxide and carbon dioxide, at concentrations far less than those given off by equal volumes of wood products.
Environmental Advantages
Inert, non intuitive, highly stable. Contains no CFC, HCFC, or HFC. Contains no formaldehyde.
Applications
Below Grade
Underslab
Protection Board
Siding Underlayment
Exterior Sheathing
Masonry Cavity Wall
Roof insulation
Weather Resistive Barrier
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