EXe 2.5 Panel (Exterior Applications)

Product Overview

The EXe 2.5 is our most versatile exterior grade panel it is optimized for masonry or framed construction. The EXe Combines rainscreen, insulation, attachment strips or furring, with self-flashing panels. Thus eliminating parts, pieces and guess work with the in the field conditions. 


    • SKU: FP-2.5NRW (5 panels 40 sq-ft.
    • EXe 2.5


SKU: FP-2.5NRW = 1 box contains a total of 5 EXe 2.5 Panels covering 40 sq.ft.

Product Video

Engineered Features

R-10 Continuous Insulation

At 2½-in thickness, the EX 2.5’s closed-cell, injection-molded EPS foam body achieves R-10 insulation.

EPS is a non-toxic, inert insulation that maintains its R-value throughout the life of your building. Because it does not absorb moisture like open-cell types of bead board, it is rated highly for damp and humid conditions. The EPS body is a fire-retardant material and serves as a Class III vapor barrier.

Strong Rot-Resistant Studs

Each panel is co-molded with three high-strength polypropylene studs that align every 16-in O.C. The anterior surfaces are fully embedded by a ½-in of insulation while the posterior surfaces feature ribbed dovetails for adhesive applications against interior concrete, stone, metal or brick walls. They are not prone to moisture damage, and do not thermally short the wall system.

Self-Leveling Tongue-and-Groove Interlocks

Tight interlocking edges form a continuous, self-flashing seal. Unlike traditional flashing tapes, the 3 dimensional seal that will not change shape, dry or crack over time. The self-flashing tongue and groove prevents thermal and water leaks.

A notched alignment system ensures the panels and studs stay aligned even when cut to fit.

Rain Screen Moisture Control

Built into the front and back of the EX panel is a network of shingle-style capillary channels. They comply with Oregon Residential Speciality Code section R701.1 allowing the panel to serve as a certified rainscreen for exterior applications.

The channels are specifically-sized cavities that moderate wall pressure so that both interior and exterior wall assemblies can drain and be allowed to remain dry.

Double Thermal Disconnect

  • 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 a ½” reducing thermal shorts to near zero.
    • Fastening the exterior cladding does not penetrate the weather resistant barrier keeping your building secure and dry.
  • EXe 2.5 panel continuous insulation is the best choice for continuous-continuous insulation.
Physical Properties, Architectural Details

EXe 2.5 Insulated Panel with Studs

EXe 2.5 Flat Panel Details
dfx dwg pdf EXe 2.5 zip file
InSoFast Exterior Architectural Submittal pdf
Panel Body Dimensions 24in × 48in × 2½in
Drainage Channel Dimensions 24in × ¼in × ¼in


8 sq-ft

R-Value ASTM C518


Comparable Performance to

2×4 Wall/R-15 Batts

ASTM C578 Type II

Closed-Cell, injection-molded EPS 

Canadian Standards  CAN/ULC S701 Type 2

ASTM C303 Foam Density

1.35 lbs per cubic foot

ASTM E96 Water Vapor Permeability

 (Class III Vapor Retarder) 3.5perm/in

Maximum Service Temperature (long term)

167°F = 75 Celsius (°C)

Co-Polymer Polypropylene Insulated Stud

Recessed ½in below Surface

Interlocking Edges

Cutting Indication Lines

Designed Ready for Finishing Attachment

Both Interior/Exterior (drywall, siding, etc)

Exterior Rated Moisture Control

ORSC, Section R703.1.1-approved rain screen and drainage technology on both sides

Exterior Application

Interiors Application

Foundations Walls
Shipping Containers
Tiny Houses
Passive House
LEED/Green Build
NFPA Assemblies
Estimating Panels

Estimating and ordering is simple measure the square feet of floor, wall, or ceiling surface that the project requires to complete the job. Divide the total square  footage (xx) by 40 sq-ft. this will determine the number of  boxes required for your project, (round up to the whole box count).  Don’t overestimate.

    • One (EXe 2.5 Insulated Panel = (8 sq.ft)
    • One box of  5 (Insulated Panels = (40 sq.ft)
Estimating Adhesive

Estimating Adhesive Quantity

Estimating the amount of adhesive YOU will use has variables beyond our control like condition of your walls and how accurate are you with a glue gun? For one side wall like a 20′ standard height shipping container you will need approximately 3 tubes of the adhesive. That is in a perfect world. PL Premium 3x adhesive is applied in a ⅜” bead on the backside of the studs onto the ribbed surfaces.  We realize that a 3/8″ bead of glue is very subjective. It is important that there is enough adhesive to squish the dovetails on the back side of the stud when pressed to the container wall. Adhesive follows the “Goldie Locks rule, too much, too little, and just right To verify that enough adhesive is used, press the panel into place. Pull the panel back and check to see if the adhesive has spread out beyond the full width of the stud. It is normal for the panel to “float out” from the side of the container when it is accommodating irregularities in the container walls. Additional adhesive may be necessary in some areas. If you are doing it just right you can expect that 1 large 28-fl oz tube will cover 18 of our 24″ long studs or enough glue at a 3/8″ bead to cover 36 foot long bead of glue. 

Additionally you will have to estimate for glue around openings like windows and doors.

1 large 28-fl oz / 828 ml tube = 18 (24″ studs or inserts) approximately 6 panels or 48 square feet.


Shipping, Purchasing & Returns
Can I cancel or modify my order?

Yes but act quickly. To cancel or modify your order contact us immediately at orders@insofast.com or call 888-501-7899 with your request. However, we cannot guarantee that your request to modify or cancel your order will be granted.

How long do I have to cancel my order?

You can cancel your order any time before it reaches the “In Process Ready to Ship” stage. Once your order is in processed and sent to the fulfillment center, it cannot be cancelled without a processing fee. We strive to have all orders “In Process Ready to Ship” within 24 hours. You have less than 24 hours to cancel your order without any additional fees. If it is past the 24-hour mark and you do not want the items you ordered, you can still return them. See below.

Will I be charged if I cancel my order after it is shipped?

Yes you will be charged in the event of a cancellation. The freight company’s charges for delivery will be assessed. At a minimum you will be charged a $30 restocking fee per box and up to 50% of the cost of the entire order.

No Returns without Authorization.

Authorized Returns are subject to $35 Restocking Charge per box up to 50% of the cost of the entire order. No Returns after 30 days. No returns from authorized retailer will be accepted, all returns must go through the authorized retailer. Only unopened and clean boxes will be considered for return. No Returns for sales outside the continental US

Credit Issued.

No credits will be issued until the product has been returned and evaluated for condition.

  • Purchases made with a check will be issued a check refund within 30 days.
  • Purchases made with a credit card or debit card will have a credit issued to the same account.
    • Discover® Card, American Express®, Mastercard®, Visa®, at the discretion of InSoFast®.

Please read all the current Shipping, Purchasing & Returns *

See if InSoFast flat panels are right for your project. We have a low risk sample pack program established in the lower 48 states. We will ship to you an InSoFast sample pack, literature, and an installation guide for $30.00. If you purchase more than $600.00 of the flat panels we will credit you for cost of the sample packs within 90 days of your purchase. (limit 1 pack $30.00 maximum credit)

(Due to additional freight charges, sample credits are not available for International orders to, Canada, Mexico, Alaska and Hawaii and will include additional freight charges to those regions.) 

Freight Details / Dimensions Weight
We offer free curb side deliveries on all of our orders.

You may upgrade your delivery service for an additional charge. LIFT GATE SERVICE IS AN ADDITIONAL CHARGE. Please read through our shipping and purchasing policies, for more details before placing your order. 

Product Code

Number of Parts

Box Dimension

Cubic Feet Per Box

 Weight Per Box




EXe 2.5

5 Panels 40 SqFt





22 Lbs

NFPA 285 Wall 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
NFPA 285 compliant assemblies-cmu-adhered stone NFPA 285 compliant assemblies-cmu-adhered brick NFPA 285 compliant assemblies-cmu-horizontal Nichiha siding NFPA 285 compliant assemblies-cmu-horizontal cement board siding
Steel Frame Assemblies
NFPA 285 compliant assemblies-steel framing-horizontal cement clap board siding NFPS 285 compliant assemblies-steel framing-stucco NFPA 285 compliant assemblies-steel framing-adhered brick NFPA 285 compliant assemblies-steel framing-adhered stone

Add R-Value with InSoFast PLUS

It’s easy to increase your R-Value beyond R-10 while maintaining the engineered benefits of the continuous InSoFast panels. Just start with a base of feature-rich InSoFast panels.