PlastiSpan® Recessed Nailer (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). PlastiSpan RN has recessed edges on the long edges of the board to fit strapping.

Other thicknesses are available upon request to meet the R-value requirements of your project.

The addition of PlastiSpan RN insulation increases the effectrive R-value of a wall assembly by eliminating thermal shorts due to wood studs which leave a large portion of the wall area un-insulated.

  • Meets all building code requirements
  • Available in Type 1, 2 and 3
  • R-values of 3.75, 4.04 and 4.27 per inch respectively
  • Closed cell insulation resists moisture
  • Easy to cut and install
  • Maintains R-value
  • A cost-effective insulation for higher energy efficiency and savings

Material Properties of PlastiSpan® RN Insulation

Standard Dimensions
Width Length Thickness
406 or 610 mm
(16" or 24")
2440 mm
(8 ft.)
Minimum 38 mm
(1 1/2" in.)
PlastiSpan RN Insulation Material Properties ASTM Test Method Units Property Values
Type 1 Type 2 Type 3
Thermal Resistance
Minimum per 25mm (inch)
C518 m20C/W
Compressive Resistance
Minimum @ 10% Deformation
D1621 kPa
Flexural Strength
C203 kPa
Water Vapour Permeance
E96 ng/(Pa.s.m2)
Water Absorption
D2842 % By Volume 6.0 4.0 2.0
Dimensional Stability
Maximum, 7 Days @ 70± 2℃ (158±40F)
D2126 % Linear Change 1.5 1.5 1.5
Limiting Oxygen Index
D2863 % 24 24 24
Other Standard & Custom thicknesses available upon request.
Standard sizes range from; 2x4,2x8,4x4,4x8.

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