Flat Panel Ordering Details

Chose the panel that’s suited for your application interior or exterior.

MAX 3.75 RW Interior/Exterior

3 3/4 inch thick R-15.9 flat panel closed-cell insulation for, floors, walls, interior and exterior applications.


The MAX 3.75 RW is 3¾ in thick closed-cell, injection-molded EPS foam panel that achieves R-15.9 insulation. The MAX 3.75 RW is a universal super insulated flat panel, optimized for interior and exterior finishing. The MAX 3.75 RW flat panel will work on floors, walls, ceilings.


MAX 3.75 Insulated Flat Panel with Studs

FP-3.75 Panel Details dfx  - dwg - pdf
  FP-3.75 zip file
Architectural Submittal pdf
Panel Dimensions 24in × 48in × 3¾in
Sealed Horizontal Chase 24" o.c.

 48in × 1in × ¾in

Sealed Vertical Chase 16" o.c.

 24in × ¾in × ¾in

Drainage Channel 24in × ¼in × ¼in


8 sq-ft

R-Value ASTM C518



2×4 Wall/R-20 Batts

ASTM C578 Type II

     CAN/ULC S701 Type 2


injection-molded EPS 

ASTM C303 Foam Density

1.35 lbs

per cubic foot

ASTM E96 Water Vapor Permeability

 (Class III Vapor Retarder)


Maximum Service Temperature

(long term)

167°F = 75 Celsius (°C)

Co-Polymer Insulated Stud

Recessed ½in below Surface

Interlocking Edges

Service Raceways

Cutting Indication Lines

Designed Ready for Finishing Attachment


Exterior Rated Moisture Control


Section R703.1.1-approved 

Exterior Application

Interiors Application