Physical Properties and ASTM Specifications

Typical properties of CertiFoam brand inusulation1
  ASTM
test method		 CertiFoam
15		 CertiFoam 25
SE, SL		 CertiLite
System Board		 CertiFoam
40		 CertiFoam 60
CertiFoam
Plaza Deck
Insulation Properties
Thermal Conductivity k
(Btu/hr. sq. ft. °F)
5-Year Aged (Design)
Values3
@ 25° F mean
@ 40° F mean
@ 75° F mean
6-Month Aged Values4
@ 75° F mean
Fresh (As Manufactured)
Values5
@ 40° F mean
 
C 177-762
or
 
C 518-762
 
 
 
 
 
 
 
 
 
 
 
 
 
0.178
0.185
0.200
 
0.192
 
 
0.110
 
 
 
 
 
0.178
0.185
0.200
 
0.192
 
 
0.110
 
 
 
 
 
0.178
0.185
0.200
 
0.192
 
 
0.110
 
 
 
 
 
0.178
0.185
0.200
 
0.192
 
 
0.110
 
 
 
 
 
0.178
0.185
0.200
 
0.192
 
 
0.110
Water Resistant Properties
Water Absorption
(% by volume)
Water Vapor Permeance
(perm Maximum)
 
D 2842-696
C272-767
 
E 96-808
 
1.0
<0.1
 
1.0
 
1.0
<0.1
 
1.0
 
1.0
<0.1
 
1.0
 
1.0
<0.1
 
1.0
 
1.0
<0.1
 
1.0
Mechanical Properties
Compressive Strength
(lb./sq. in.)
Minimum (specification)
Value
 
D 1621-73
 
 
 
 
209
 
15
 
 
409
 
25
 
 
409
 
25
 
 
5010
 
40
 
 
7010
 
60
Miscellaneous Properties
Maximum Recommended
Use Temperature (°F)
Linear Coefficient of
Thermal Expansion
(in./in. °F)
 
 
 
 
 
D696
 
 
165
 
 
3.5x10-5
 
 
165
 
 
3.5x10-5
 
 
165
 
 
3.5x10-5
 
 
165
 
 
3.5x10-5
 
 
165
 
 
3.5x10-5
  1. Typical property values are based principally on most recent product audit and sampling data.  For specific property ranges and bounds, contact you DiversiFoam Products representative.
  2. Because of ongoing technical discussions regarding the complete application of test methods C117-76 and C518-76, traditional industry methods for determining the thermal conductivity of low density insulations are used.  test uncertainty of thicker foam insulations is expected to be less than 5 percent from listed values.
  3. Recommended typical design values after five-year aging at 75°F.
  4. Partially aged values after six-month aging at 75°F or three-month aging at 140°F.  These values are not recommended for use in design calculations.  They are included for comparison with published values for polyisocyanurate and polyurethane foams measured after aging for these periods according to RIC/TIMA procedure 281-1.
  5. Fresh or "as manufactured" k factors for comparison purposes only.  DiversiFoam Products and XEPS industry organizations continue to recommend that long-term aged values be used for design calculations.
  6. Test precision is plus or minus 1.0 percent by volume.
  7. Values will be between 0.0 and the values shown.
  8. Desiccant method.  For all CertiFoam products one inch or greater in thickness.
  9. Vertical compressive strength at 10% deformation or yield, whichever occurs first.  Structural applications involving high continuous loads, high temperatures, or non-uniform loads may require higher safety factors based on minimum specification values.
  10. Vertical compressive strength at 5% deformation or yield, whichever occurs first.  To minimize viscoelastic deformation with time in load-bearing applications, higher safety factors are recommended:  3:1 for dead loads, and 5:1 for live or combined loads.  Elevated temperatures may also require higher safety factors.
Thermal Resistance (R-value) of five-year aged CertiFoam
Nominal
Thickness (in.)		 @ 25°F Mean
Temperature		 @ 40°F Mean
Temperature		 @ 75°F Mean
Temperature
1/2
3/4
1
1 1/2
2
2 1/2
3
2.8
4.2
5.6
8.4
11.2
14.0
16.9
2.7
4.1
5.4
8.1
10.8
13.5
16.2
2.5
3.8
5.0
7.5
10.0
12.5
15.0

ASTM C 578-05 specifications for rigid cellular polystyrene thermal insulation
This standard supercedes Federal Specifications HH-I-524 B, HH-I-524 C, and ASTM C 578-01

 
Type I Type VII Type II Type X Type IX Type IV Type VI Type VII Type V
Insulation Material
Expanded polystyrene (EPS)
Extruded polystyrene (XEPS)
                 
EPS EPS EPS   EPS        
      XEPS   XEPS XEPS XEPS XEPS
Physical Properties
Density, minimum lb/ft3 (kg/m3)
Thermal resistance of 1.00 in. (25.4 mm)
thickness, minimum °F-ft2h/Btu (k-m2/W)
at mean temperature:
40°F (4.4°C)
75°F (23.9°C)
Compressive resistance at yield or 10%
deformation, whichever occurs first (with
Skins intact), minimum, psi (kPa)
Flexural strength, minimum, psi (kPa)
Water vapor permeance of 1.00 in. (25.4 mm)
thickness, max, perm (ng/Pa-s-m2)
Water absorption by total immersion,
maximum, volume %
Dimensional stability, (change in
dimensions), maximum, %
Oxygen index, minimum, volume %
                 
0.9 (15) 1.15 (18) 1.35 (22) 1.30 (21) 1.8 (29) 1.6 (29) 1.8 (29) 2.2 (35) 3.0 (48)
                 
                 
                 
4.0 (.70) 4.2 (.74) 4.4 (.77) 5.4 (.95) 4.6 (.81) 5.4 (.95) 5.4 (.95) 5.4 (.95) 5.4 (.95)
3.6 (.63) 3.8 (.67) 4.0 (.70) 5.0 (.88) 4.2 (.74) 5.0 (.88) 5.0 (.88) 5.0 (.88) 5.0 (.88)
                 
                 
10.0 (69) 13.0 (90) 15.0 (104) 15.0 (104) 25.0 (173) 25.0 (173) 40.0 (276) 60.0 (414) 100.0 (690)
25.0 (173) 30.0 (208) 40.0 (276) 40.0 (276) 50.0 (345) 50.0 (345) 60.0 (414) 75.0 (517) 100.0 (690)
                 
5.0 (287) 3.5 (201) 3.5 (201) 1.1 (.63) 2.0 (115) 1.1 (.63) 1.1 (.63) 1.1 (.63) 1.1 (.63)
                 
4.0 3.0 3.0 0.3 2.0 0.3 0.3 0.3 0.3
                 
2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0
24.0 24.0 24.0 24.0 24.0 24.0 24.0 24.0 24.0
Product meets or exceeds Type:
CertiFoam 15
CertiFoam 25 SE, SL
CertiLite System Board
CertiFoam 40
CertiFoam 60/CertiFoam Plaza Deck
                 
X X X X          
X X X X X X      
X X X X X X      
X X X X X X X    
X X X X X X X X  

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