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PlastiSpan® RN Insulation
Cost effective rigid insulation, recessed edges to fit strapping

PlastiSpan® RN Insulation is used in Continuous Insulation and Insulating Interior Basement Walls.


PlastiSpan® RN insulation applied to the exterior of above-grade wood
frame walls is a great way to increase the energy efficiency of that portion
of the home. PlastiSpan RN insulating sheathing is manufactured with the
long edges routed out to fit a 19 x 64 mm (1” x 3”) nailer for the
installation of exterior cladding.

PlastiSpan RN insulation installed over the exterior of wood frame walls
increases the effective thermal resistance (/RSIeff Reff) of the total wall
assembly because it eliminates thermal bridges due to wood studs
(which leave approximately 20% of the wall area without insulation).

• Contact us for other available thicknesses
• The addition of PlastiSpan RN insulation increases the RSIeff/Reff of a
wall assembly by eliminating thermal shorts due to wood studs which
leave a large portion of the wall area un-insulated
• Recessed edges to fit strapping





Material Property Units ASTM C578
XI I VIII II IX XIV
Normal Density pcf
(kg/m3)
0.75
(12)
1.00
(16)
1.25
(20)
1.50
(24)
2.00
(32)
2.50
(40)
Density
Minimum
pcf
(kg/m3)
0.70
(12)
0.90
(15)
1.15
(18)
1.35
(22)
1.80
(29)
2.40
(38)
R-value (RSI)1
Minimum per inch
(25.4 mm)

75 ºF
(24 ºC)
ft2•hr•°F/Btu
(°C•m2/W)
3.1
(0.55)
3.6
(0.63)
3.8
(0.67)
4.0
(0.70)
4.2
(0.74)
4.2
(0.74)
Design R-value (RSI)2
per inch (25.4 mm) thickness
40 ºF
(4.4 ºC)
ft2•hr•°F/Btu
(°C•m2/W)
3.4
(0.60)
4.2
(0.73)
4.3
(0.75)
4.6
(0.80)
4.8
(0.84)
4.8
(0.84)
75 ºF
(24 ºC)
ft2•hr•°F/Btu
(°C•m2/W)
3.2
(0.57)
3.9
(0.68)
3.9
(0.69)
4.2
(0.73)
4.4
(0.77)
4.4
(0.77)
Compressive Resistance
Minimum @10% deformation
psi
(kPa)
5.0
(35)
10.0
(69)
13.0
(90)
15.0
(104)
25.0
(173)
40.0
(276)

Water Vapor Permeance
Maximum

Perm
(ng/Pa•s•m2)
5.0
(287)
5.0
(287)
3.5
(201)
3.5
(201)
2.5
(143)
2.5
(143)
Flexural Strength
Minimum
psi
(kPa)
10.0
(70)
25.0
(173)
30.0
(208)
35.0
(240)
50.0
(345)
60.0
(414)
Dimensional Stability
Maximum
% linear change 2.0 2.0 2.0 2.0 2.0 2.0
Water Absorption3
Maximum
% by volume 4.0 4.0 3.0 3.0 2.0 2.0
Oxygen Index
Minimum
volume % 24 24 24 24 24 24

1Thermal resistance values are minimum requirements per C578 at mean temperature of 75 ºF (24 ºC).
2Design thermal resistance values are provided at mean temperatures of 40 ºF (4.4 ºC) and 75 ºF (24 ºC). 
3ASTM Test Method C272 water absorption requires 24 hours submersion of specimen under water. The water
absorption values above are applicable to specific end-use design requirements only to the extent that the
end-use conditions are similar to requirements stated in the test method.