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
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
 
C 177-762
or
 
C 518-762
 
 
 
 
 
 
 
 
 
 
0.178
0.185
0.200
 
0.192
 
 
 
 
 
0.178
0.185
0.200
 
0.192
 
 
 
 
 
0.178
0.185
0.200
 
0.192
 
 
 
 
 
0.178
0.185
0.200
 
0.192
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
Mechanical Properties
Compressive Strength
(lb./sq. in.)
Minimum (specification)
Value
 
D 1621-73
 
 
 
 
209
 
15
 
 
409
 
25
 
 
409
 
25
 
 
5010
 
40
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
  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 75F.
  4. Partially aged values after six-month aging at 75F or three-month aging at 140F.  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.  
  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.)
@ 25F Mean
Temperature
@ 40F Mean
Temperature
@ 75F 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 578-10 specifications for rigid cellular polystyrene thermal insulation
This standard supersedes Federal Specifications HH-I-524 B, HH-I-524 C, and ASTM C 578-08

 
Type I Type VIII Type II Type IX Type XIV Type X Type IV Type VI Type VII
Insulation Material
Expanded polystyrene (EPS)
Extruded polystyrene (XEPS)
                 
EPS EPS EPS EPS EPS        
          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:
40F (4.4C)
75F (23.9C)
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) 1.8 (29) 2.4 (38) 1.3 (21) 1.55 (26) 1.8 (29) 2.2 (35)
                 
                 
                 
4.0 (.70) 4.2 (.74) 4.4 (.77) 4.6 (.81) 4.6 (.81) 5.4 (.95) 5.4 (.95) 5.4 (.95) 5.4 (.95)
3.6 (.63) 3.8 (.67) 4.0 (.70) 4.2 (.74) 4.2 (.74) 5.0 (.88) 5.0 (.88) 5.0 (.88) 5.0 (.88)
                 
                 
10.0 (69) 13.0 (90) 15.0 (104) 25.0 (173) 40.0 (276) 15.0 (104) 25.0 (173) 40.0 (276) 60.0 (414)
25.0 (173) 30.0 (208) 40.0 (276) 50.0 (345) 60.0 (414) 40.0 (276) 50.0 (345) 60.0 (414) 75.0 (517)
                 
5.0 (287) 3.5 (201) 3.5 (201) 2.0 (115) 2.5 (143) 1.5 (86) 1.5 (86) 1.1 (63) 1.1 (63)
                 
4.0 3.0 3.0 2.0 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
                 
          X      
            X    
            X    
              X  
                X

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