InSoFast is 4 times faster and less expensive. For more information about material cost go to our comparison page: Compare cost/value
Exterior Panels
MAX 3.75 RW Interior/Exterior
3 3/4 inch thick R-15.9 flat panel closed-cell insulation for exterior wall 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.
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MAX 3.75 Insulated Flat Panel with Studs |
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| FP-3.75 Panel Details | dfx - dwg - pdf |
| FP-3.75 zip file | |
| Architectural Submittal | |
| Panel Dimensions | 24in × 48in × 3¾in |
| Sealed Horizontal Chase 24" o.c. |
48in × 1in × ¾in |
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Sealed Vertical Chase 16" o.c. |
24in × ¾in × ¾in |
| Drainage Channel | 24in × ¼in × ¼in |
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Coverage |
8 sq-ft |
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R-Value ASTM C518 |
R-15.9 |
| Outperforms |
2×4 Wall/R-20 Batts |
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ASTM C578 Type II CAN/ULC S701 Type 2 |
Closed-Cell injection-molded EPS |
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ASTM C303 Foam Density |
1.35 lbs per cubic foot |
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ASTM E96 Water Vapor Permeability |
(Class III Vapor Retarder) 3.5perm/in |
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Maximum Service Temperature (long term) |
167°F = 75 Celsius (°C) |
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Recessed ½in below Surface |
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Interlocking Edges |
√ |
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Service Raceways |
√ |
| Cutting Indication Lines |
√ |
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Designed Ready for Finishing Attachment |
Interior/Exterior |
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Exterior Rated Moisture Control |
ORSC, Section R703.1.1-approved |
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Exterior Application |
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Interiors Application |
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2.5 NRW Exterior
2 1/2 inch thick R-10.5 flat panel closed-cell insulation for exterior wall applications.
The FP-2.0RW (UX) is a feature rich insulation panel. The panel is optimized for exterior wall applications, one trip the the wall does what traditional methods need 5 trips. High pressure steam fusion co-molds the non ferrous studs every 16” on center providing positive attachment for siding and superior moisture and insulation control.
| FP 2.5 NRW Flat Panel | dfx - dwg - pdf - FP 2.5NRW zip file |
| InSoFast Exterior Architectural Submittal | |
| Panel Body Dimensions | 24in × 48in × 2½in |
| Drainage Channel Dimensions | 24in × ¼in × ¼in |
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Coverage |
8 sq-ft |
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R-Value ASTM C518 |
R-10.5 |
| Comparable Performance to |
2×4 Wall/R-15 Batts |
| ASTM C578 Type II |
Closed-Cell, injection-molded EPS |
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Canadian Standards CAN/ULC S701 Type 2 |
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ASTM C303 Foam Density |
1.35 lbs per cubic foot |
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ASTM E96 Water Vapor Permeability |
(Class III Vapor Retarder) 3.5perm/in |
| Maximum Service Temperature (long term) |
167°F = 75 Celsius (°C) |
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Recessed ½in below Surface |
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Interlocking Edges |
√ |
| Cutting Indication Lines |
√ |
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Designed Ready for Finishing Attachment |
Both Interior/Exterior (stucco, siding, etc) |
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Exterior Rated Moisture Control ORSC, Section R703.1.1 |
-approved rain screen and drainage technology on both sides |
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Exterior Application |
√ |
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Interiors Application |
√ |
Why would you work this hard?
- Weather Resistant Barrier
- Drainage Mat
- Foam Board with Fasteners
- All Weather Flashing Tape
- Furring Strips and Heavy Duty Fasteners
If you can go to the wall once and be done,
- Weather Resistant Barrier
- Foam Board with Fasteners
Continuous insulation done right.
- R-10 Closed-cell EPS Continuous Insulation
- Stable insulation zero thermal drift
- Built-in Drain and Dry Technology
- Rot-Resistant, Embedded Stud Framing
- Interlocking Tongue and Groove Edges
- Less work faster results!
- Simple to install, less parts and pieces
- Self-flashing panels; no taping seams
- No special tools or training needed
- One trip to the wall.
- Lives up to its name: In So Fast
- Self-aligning interlocks provides straight and true framing
- The panel adds a secondary layer of defense.
- Interlocking self-flashing barrier
- InSoFast’s rain screen, “drain-and-dry” technology
- Accomplished in one step, that takes 4 steps with traditional assemblies.
- The built-in dual drainage planes
- Allows excess water to, “drain-and-dry”; your building safe and dry.
- Exterior Rated Moisture Control Tested to and exceeds;
- *ORSC, Section R703.1.1-approved rain screen and drainage technology
"Oregon Residential Specialty Code"
The exterior wall envelope shall be installed in a manner such that water that enters the assembly can drain to the exterior. The envelope shall consist of an exterior veneer, a water-resistive barrier as required in Section R703.2, a minimum 1/8-inch (3 mm) space between the water-resistive barrier and the exterior veneer, and integrated flashings as required in Section R703.8. The required space shall be formed by the use of any noncorrodible furring strip, drainage mat or drainage board. The envelope shall provide proper integration of flashings with the water-resistive barrier, the space provided and the exterior veneer. These components, in conjunction, shall provide a means of draining water that enters the assembly to the exterior.
- The panel provides a double thermal and moisture disconnect
- Uninterrupted continuous insulation (CI)
- InSoFast goes beyond just “CI”. The fastener that attaches the panel is recessed ½” and insulated reducing the thermal short to near zero.
- Fastening the exterior cladding does not penetrate the weather resistant barrier keeping your building secure and dry.
- EXe 2.5 panel is the best choice for CONTINUOUS-continuous insulation.
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| A complex and labor intensive multi-step and multi-piece assembly. | An engineered one step to install panel. Same results less risk. |
- The human factor is engineered out of the installation process.
- Less parts and pieces = less training
- InSoFast will not rot, rust, warp, or decay
- Maintains its R-Value in extreme conditions, year after year.
- Exceed expectations, assemble less and Build Better.
- Combines rainscreen, insulation, and attachment
- Self-flashing panels; no taping of the board seams
- Drains better, dries better, performs better
- Thermally recessed fasteners; no cold spots
- No energy penalty for the fastener
- No energy penalty for the studs
- Non-conductive stud framing
- Non corrosive stud...no rusting
- Lives up to its name: In-So-Fast
- One detail, one solution
- Nationwide Code Compliance
- Rigorous testing and assurances
- Continuous insulation for nearly all assemblies
National Fire Protection Association (NFPA) in the International Building Code states that – wall assemblies shall be tested in accordance with and comply with the acceptance criteria of NFPA 285. InSoFast has tested and passed these stringent guidelines, here are a few of the possibilities that will work with the InSoFast continuous insulation panel. Please contact us for specific details.
Load Bearing Masonry Assemblies |
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| Cultured Stone Veneer | Thin Brick Veneer | Vented Rain Screen | Cement Board Siding |
| Steel Frame Assemblies | |||
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| Steel Siding | 3-Coat Stucco | Vertical Siding | Vertical Siding Rain Screen |
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This is an all concrete home being built in North Carolina; In this series of videos we will explore finishing concrete with InSoFast. |
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InSoFast Flat Panel EXe 2.5 is a feature rich continuous insulation panel. The EXe is optimized for exterior wall applications |
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For legal sake, we should probably clarify that you can try InSoFast panels at home. We don't necessarily condone trying the rock-climbing part at home. |
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The InSoFast Panel features built-in drainage channels that are specifically designed to direct the flow of moisture out of the wall. |
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Side Jamb Flashing Detail describes how to flash around an exterior window. This process added a 2 1/2" extension jamb so that the window will sit flush with InSoFast insulation panels. The jamb also provides an attachment point for siding. |
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Sill Flashing Detail describes how to flash around the sill of a window. This process added a 2 1/2" extension jamb so that the window will sit flush with InSoFast insulation panels. |
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Typical Head Jamb Flashing Detail to direct water around and away from the window opening. |
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This video illustrates a method for installing a pre-engineered insulated window buck being nailed to the wall. Additionally it shows a nail gun applying the panels to the wall. |
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This video illustrates the use of a starter track along the base of a home. The track contains special "weep holes" which direct moisture off and away from the surface of the home. |
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Built-in stud framing allows for fast installation exterior continuous insulation. During warmer weather the insulation can be nailed to the wall. |
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Attaching Siding directly to the built-in stud framing of the insulation panels. During warmer weather the insulation can be nailed to the wall. |
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In this video we demonstrates how Dan and the crew of MJ Builders attach James Hardie siding board to InSoFast panels. Dan illustrates a few techniques to assure a 32" offset of the lap siding. |
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InSoFast Metal colored flashing roof detail. This is coil stock metal bent to protects the exposed InSoFast Foam from UV degradation. |
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Remodeling the exterior wall with InSoFast and Hardie siding on a 1960's era colonial home to update and give the home a face lift and complete energy retrofit. |
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Technical description of InSoFast exterior applications over steel studs here we discuss a few of the different finishes. |
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Why InSoFast's panel is 24" x 48" expanded polystyrene. InSoFast could have manufactured our panel with any type of insulation and we chose shape molded Expanded Polystyrene. In this video we explain a few of the reasons. |
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Board and Batten Exterior with InSoFast panels. Our use of board and batten siding demonstrates one of the many exterior finishing choices you have when you insulate with InSoFast. |
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Tom from TBD Architecture discusses at the PassiveHouse 2016 Conference InSoFast affordability, cost of ownership is a wash! Better to invest in insulation then pay more for energy, which is an uncertain cost over time. |
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InSoFast exterior project in Minneapolis it isn’t a typical job site with a professionally-trained crew. This is a Urban Homeworks project coordinated by Minneapolis-based non-profit focused on rebuilding neighborhoods with the help of volunteers and students. |
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InSoFast exterior insulation vs Complexity (the human factor) why architects and community leaders choose InSoFast. Complex insulation methods are tedious and simple mistakes on the different layers can lead to major problems. |
The InSoFast panel studs provide a simplified approach to wall assembly. The InSoFast stud are injection-molded high-strength recycled polypropylene plastic. A special co-molding process expands the foam insulation around the studs forming one solid panel. The studs provide a structural attachment point to the substrate and for the specified finishes. For More Information:
| Inside Corners, All | |||
| Outside Corners, All | |||
| Foam Over 2x Backer | dxf | dwg | |
| Foam Under 2x Backer | dxf | dwg | |
| InSoFast No Backing | dxf | dwg | |
| ZipWall Backer Over Foam Board | dxf | dwg | |
| Zip Wall No Backer | dxf | dwg | |
| Foam Over Backer Stud | dxf | dwg | |
| Sheet Metal Backer | dxf | dwg | |
| Sheet Metal Strapping Backer | dxf | dwg | |
| InSoFast Over Additional Sheet Foam No Backer | dxf | dwg | |
| InSoFast With Additional Sheet Foam No Backing | dxf | ||
| Inside Corner No Backing | dxf | dwg | |
| Inside Corner 2x Backer With Foam | dxf | dwg |
| Outset Windows, All | |||
| Inset Windows, All | |||
| Outset Window Sill Section | dxf | dwg | |
| Outset Window Head Jamb Section | dxf | dwg | |
| Outset Window Horizontal Section | dxf | dwg | |
| Outset Window with 2×3 Framing Head Jamb Section | dxf | dwg | |
| Outset Window with 2×3 Framing Horizontal Section | dxf | dwg | |
| Outset Window with 2×3 Framing Sill Section | dxf | dwg | |
| Inset Window Head Jamb Section | dxf | dwg | |
| Inset Window Horizontal Section | dxf | dwg | |
| Inset Window Sill Section | dxf | dwg |
- Rigid Insulation on Exterior Walls
- Controlling Cold-Weather Condensation Using Insulation
- Insight: A Bridge Too Far
- Musings of an Energy Nerd: Air-Sealing Tapes and Gaskets
- Musing of an Energy Nerd: In Cold Climates, R-5 Foam Beats R-6
- Installing Exterior Insulation in Cold Climates
- Energy Saving Makes Cents
InSoFast Plus Method
Need a higher R-value? No Problem! Start with a base of InSoFast continuous insulation panels that are feature-rich and easy to install and then add rigid foam insulation over top of InSoFast panels.
