DynaClad Polyiso NB

Polyiso NB is a rigid roof insulation composite panel composed of a closed cell polyisocyanurate foam core manufactured on-line to a fiber reinforced facer on one side and either 7⁄16″ or 5⁄8″ oriented strand board (OSB) on the other. Polyiso NB can also be manufactured off-line using an FM approved adhesive.

Features and Benefits

  • Manufactured with NexGen Chemistry: Contains no CFCs, HCFCs, is Zero ODP, EPA Compliant, and has virtually no GWP
  • A superior combination of high insulating properties and a nailable surface
  • Suitable for new construction and re-roofing on both commercial and residential projects
  • Incorporates APA-TECO Rated Exposure 1 OSB
  • The edges of the wood panels are rabbeted to allow for expansion and contraction of the wood, the foam edges shall be installed
    tightly to achieve thermal integrity across the entire roof deck
  • Also available as a non-rabbeted panel upon special request only
  • H-Shield NB is also available bonded to plywood in an off-line process
  • Hail Rating: SH-1


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  • Available size is 47.5″x95.5″ when rabbeted on line in thicknesses of 1.5″ (38mm) to 4.0″ (102mm)
  • Available in 4’x8′ when non-rabbeted in thicknesses of 1.5″(38mm) to 4.0″ (102mm)
  • Available in two compressive strengths per ASTM C 1289 Type V, Grade 2 (20 psi) or Grade 3 (25 psi)
  • Available with FSC® Certified OSB or plywood (special order)
  • When FSC wood is specified, H-Shield NB is manufactured with H-Shield CG
  • Multiple Substrate Types Available:
    • OSB:  7⁄16″ or 5⁄8″
    • Plywood: 5⁄8″ or 3⁄4″ CDX · Fire-Treated


  • Polyiso NB with 7⁄16″ OSB is suitable for use with heavyweight shingles and standing seam metal roof systems
  • Polyiso NB with 5⁄8″ OSB is suitable for use with tile and slate roof systems
  • Single-Ply Roof Systems – Ballasted, Mechanically Attached, Fully Adhered. (For high wind speed warranty — see individual Single-Ply manufacturer approvals and listings)


Codes and Compliances

  • ASTM C 1289 Type II, Class 1 Grade 2 (20 psi) or Grade 3 (25 psi)
  • International Building Code (IBC) Chapter 26
  • State of Florida Product Approval Number FL 5968
  • Miami Dade County, FL NOA NO: 09-0915.15 — Exp. 1.14.2015

Underwriters Laboratories Inc Classifications

  • UL 1256
  • Insulated Metal Deck Construction Assemblies – No. 120, 123
  • UL 790
  • UL 263 Hourly Rated P Series Roof Assemblies

UL Classified for use in Canada

  • Refer to UL Directory of Products Certified for Canada for more details

Factory Mutual Approvals

  • FM 4450, FM 4470
  • Approved for Class 1 insulated steel deck constructions for 1-60 to 1-270. Refer to FM Approval’s RoofNav for details on specific systems

LEED Potential Credits for Polyiso Use (PRE LEED V4)

For current LEED V4 contribution information go to www.PIMA.org or www.hpanels.com

  • Energy and Atmosphere
    • Optimize Energy Performance
    • Measurement & Verification
  • Materials & Resources
    • Material Reuse
    • Construction Waste Management
    • Recycled Content
    • Local and Regional Materials
    • Certified Wood
  • Innovation and Design


Insulation must be protected from open flame and kept dry at all times. Install only as much insulation as can be covered the same day by completed roof covering material. Hunter Panels will not be responsible for specific building and roof design by others, for deficiencies in construction or workmanship, for dangerous conditions on the job site or for improper storage and handling. Technical specifications shown in this literature are intended to be used as general guidelines only and are subject to change without notice. For more information refer to the Storage and Handling Technical Sheet, or refer to PIMA Technical Bulletin No. 109: Storage & Handling Recommendations for Polyiso Roof Insulation at www.polyiso.org.


Metal Roofing

Polyiso NB is installed, wood side up, over metal, wood or structural roof decks. Wood blocking, if necessary, should be equal in thickness to the Polyiso NB and should be installed along the eaves and rake edges of the roof.

Polyiso NB may be adhered to a properly prepared cementitious deck (with a full mopping of Type III or Type IV asphalt or a low rise adhesive) only when manufactured online.  All Polyiso NB manufactured off-line must be mechanically attached.

The Use of Synthetic Underlayments

1. Install approved polypropylene sheet material in 10 square rolls equal to the product listed, applied in shingle-like application in continuous coverage from eave to ridge per roof area with approved mechanical
attachment procedures.
a. DMI DynaClad® Polyiso NB Premium Roofing Underlayment

2. Install DMI Ultra HT Wind & Water Seal Underlayment in critical areas such as
valleys, aprons, rakes, and penetrations, particularly as they apply to watertight warranty requirements

When Polyiso NB with a foam thickness greater than 3.5″ is specified, DMI recommends the installation of a two layer system with staggered joints.

AIA Continuing Education

DMI is committed to providing you with high-quality expert-level education in accordance with the AIA/CES standards. The courses we offer are designed to meet the needs of architects and typically run one hour in length. All Attendees will earn 1 Learning Unit. Some of the courses offered will meet the Health, Safety, and Welfare (HSW) requirements as well as the Green Building Certification Institute (GBCI) credits.

information on available courses

Our Warranties are Second to None

DMI total system warranties protect all aspects of your metal envelope system, whether that be the watertightness of the roof or siding, the Galvalume ® steel, or the durable PVDF KYNAR® finish. When looking at warranties for your system, it is important to note that not all warranties are created equal. DMI warranties ensure the watertightness of all flashing conditions, trims, curbs, valleys, and penetrations. Building owners are protected with a total system warranty - “from the deck up” when using DMI insulation, fasteners, and underlayment. Our warranties are backed-up by a full-service Engineering Department, generating project specific shop drawings. Quality control is monitored by a minimum of two on-site inspections by our Field Technical Inspectors. DMI Total System Warranties give building owners and design professionals confidence that they are receiving the highest quality and most complete warranty available in the industry.

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