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Extira Panels are Engineered for Outdoor Use

Made with the same proprietary TEC™ process used to make MiraTEC, Extira is a revolutionary product for exterior applications that performs better than wood or MDF. Extira panels may look like MDF, but they don’t perform like it. Different ingredients and a patented and proprietary manufacturing process lead to a superior performance.

Extira is easy to work with; can be carved, routed and machined. Resists moisture, rot, and termites. Twice as strong as MDF, Extira is made to be used outside.

Plus, Extira panels are covered by an industry-leading 10-year limited warranty that far exceeds competitive panel products. Download the warranty for complete details:

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Extira Panels Size Range

Thickness Options (+/- 0.005″)

Panel Size 7/16″* 1/2″ 5/8″ 11/16″* 3/4″ 1″ 1-1/4″
4′ x 8′ (49″ x 97″)
4′ x 16′ (49″ x 194″)
2′ x 16′ (25″ x 194″)

* Check with your local dealer for availability.

Extira Panel Weights

Panel Size Weight (Lbs)
4′ x 8′ (49″ x 97″) 69
4′ x 16′ (49″ x 194″) 138
2′ x 16′ (25″ x 194″) 69
Panel Size Weight (Lbs)
4′ x 8′ (49″ x 97″) 83
4′ x 16′ (49″ x 194″) 165
2′ x 16′ (25″ x 194″) 83
Panel Size Weight (Lbs)
4′ x 8′ (49″ x 97″) 99
4′ x 16′ (49″ x 194″) 198
2′ x 16′ (25″ x 194″) 99
Panel Size Weight (Lbs)
4′ x 8′ (49″ x 97″) 129
4′ x 16′ (49″ x 194″) 259
2′ x 16′ (25″ x 194″) 129
Panel Size Weight (Lbs)
4′ x 8′ (49″ x 97″) 155
4′ x 16′ (49″ x 194″) 309
2′ x 16′ (25″ x 194″) 155

Frequently Asked Questions About Extira Panels

Where can I buy Extira panels?
Visit the Where to Buy section for information on where to purchase Extira panels.
What are Extira Panels?
  • A treated wood composite panel product for non-structural applications for exterior and high moisture interior environments.
  • Available in square cut panel dimensions of 49″x 97″, 49″ x 194″ and 25″ x 194″.
  • Available in thicknesses of 1/2″, 3/4″, 5/8″, 1″ and 1 1/4″ (+ /- 0.005″). 7/16″ and 11/16″ are also available by special order.
  • Sanded two sides (S2S) for a smooth, unprimed surface.
What are the key benefits of Extira panels?
  • Moisture, rot and termite resistant. Treated with zinc borate and manufactured with phenolic resins.
  • One piece solid substrate – not laminated.
  • No added urea formaldehyde.
  • Made using sustainable materials and contributes to industry green building programs.
  • 10-year warranty.
What can I make with Extira panels?
  • Any non-structural paint grade application for exterior and interior use.
  • Extira has been used for exterior millwork such as fluting, rosettes, dentil mould, raised panels; shutters, fenestration (door and window parts); exterior signage; some marine, landscape and nursery applications; underlayment for countertops and many other applications.
How does Extira compare to MDF?
  • In internal bucket testing, Extira panels exhibited substantially smaller edge cracks after exposure and air drying than Medex.
  • Caliper swell when saturated in water improves 1-1/2 to 5 times comparing Extira to MR grade and typical MDF.
  • JELD-WEN manufactures another product, MiraTEC trim, using the same ingredients and manufacturing technology, which has performed exceptionally well since its introduction in 1998.
How are Extira panels made?
  • Wood fiber, phenolic resins, zinc borate and a water repellent are combined to form a thick, fiber mat. Extira is 90% wood. Zinc borate controls the growth of white and brown rot and other wood-destroying organisms. It is an EPA-registered biocide.
  • The fiber mat is loaded into a sealed cavity.
  • Steam is injected directly into the mat, making heat transfer uniform through the mat. This process is controlled by forced convection.
  • Steam escapes the mat evenly from the center to the periphery of the board, improving board properties and allowing thicker board dimensions.
  • This process contrasts with the slow, outside-to-inside temperature rise found in conventional MDF-type pressing.
  • After cooling, Extira is sanded on both sides with a six-headed sander to reach thickness tolerances of +/-0.005″

Click here to learn more about the TEC process.

How is MDF made?
  • Wood fibers are blended with resins (often urea formaldehyde resins) and formed into a mat.
  • No ingredients for moisture, rot or termite resistance are added.
  • The mat is pressed between hot platens.
  • Heat is transferred from the platens to the mat. This can be a slow process because air becomes trapped in the mat and moisture evaporates during this process. It also takes a long time to transfer heat to the center of the mat. Air and steam escape around the periphery of the mat. The temperature at the surfaces of the mat is greater than the core during the press cycle.
  • The properties of the final product are influenced greatly by the final core temperature within the mat.
  • Due to this process, the board is not necessarily consistent throughout all points.
What is zinc borate?
Zinc borate is a wood preservative that provides protection from wood destroying organisms for wood composite materials. It is added during the manufacturing process to control the growth of fungi that can lead to rot decay. Zinc borate is a broad-spectrum fungicide with no demonstrated adverse environmental effects (source: EPA Pesticide Fact Sheet).
Are Extira panels green?
Yes, Extira panels are made from sustainable materials. No old growth wood is used in the manufacture of Extira panels. They are made from wood that is of no commercial timber value and is the byproduct of other operations. This leftover wood is also detrimental to the overall vitality of the forest. Extira panels have no added urea formaldehyde. This is certified by Scientific Certifications Systems, certificate number SCS-MC-01802. Extira panels are CARB compliant.  They are acknowledged by the California Air Resources Board’s (CARB) Airborne Toxic Control Measure (ATCM) 93120 to utilize exempt status ultra-low emitting formaldehyde (ULEF) resins. Extira panels also contributes to industry programs such as LEED and the National Green Building Standard.
Do Extira panels contain urea formaldehyde?
Extira panels have no added urea formaldehyde. This is certified by Scientific Certifications Systems, certificate number SCS-MC-01802. Extira panels are CARB compliant.  They are acknowledged by the California Air Resources Board’s (CARB) Airborne Toxic Control Measure (ATCM) 93120 to utilize exempt status ultra-low emitting formaldehyde (ULEF) resins.
Why are Extira panels better than wood?
  • Extira panels have stable pricing and availability.
  • No knots or voids, therefore offering 100% yields.
  • Resists checking, splitting and cracking.
  • Resists moisture, rot and termites.
How are Extira panels similar to wood?

Extira is 90% wood so it retains some of same attributes. Extira handles and machines similar to wood.

How can Extira panels be cut?

Fine tooth handsaws or power saws with combination blades work best. JELD-WEN, inc. recommends carbide tipped blades. Cut into the face of the material. Extira can also be mitered for applications such as joints or column posts. Extira can be routed or shaped for a variety of molding patterns and will machine similarly to standard MDF.

How can I fasten Extira panels?

JELD-WEN, Inc. recommends traditional fasteners, such as glue and adhesives. We recommend polyurethane-based adhesives. Some general guidelines: 1) Position nails no closer than 1/2 ” from the edge; 2) Drill pilot holes when putting a screw into the edge of the product.This is not necessary when you screw into the face. JELD-WEN, Inc. does not recommend nailing into the edge of the product.

Extira is a Green Product

With the Earth’s natural resources in limited supply, choosing products that are manufactured responsibly is more important than ever. Extira uses sustainable products throughout its production processes and has earned third-party certification for no added urea formaldehyde. Extira panels also contribute to industry green building programs.

SUSTAINABLE MATERIALS

No old growth wood is used in the manufacture of Extira panels. It is made from wood that is of no commercial timber value and is the byproduct of other operations. This leftover wood is also detrimental to the overall vitality of the forest.

  • All wood comes from an area within a 150 mile radius of the Towanda, PA production facility.
  • 100% northern hardwoods are used, which includes maple, beech, oak and other species.

Extira panels are treated with zinc borate, an EPA-registered biocide and a naturally occurring earth mineral that is environmentally safe and ensures protection against termites.

NO ADDED UREA FORMALDEHYDE

Extira panels have no added urea formaldehyde. This is certified by Scientific Certification Systems under certificate number SCS-NAUF-01802.

Through repeated testing by the Composite Panel Association (CPA), Extira panels have demonstrated formaldehyde emissions equivalent to background levels found in the environment.

COMPLIES WITH CARB

Extira panels are acknowledged by the California Air Resources Board’s (CARB) Airborne Toxic Control Measure (ATCM) 93120 through CARB executive order N-17-105 (re-certified in June of 2018) to utilize exempt status ultra-low emitting formaldehyde (ULEF) resins.

CONTRIBUTES TO GREEN BUILDING PROGRAM

Extira panels contribute to industry green building programs such as LEED and the National Green Building Standard.

GREENGUARD GOLD CERTIFIED

JELD-WEN is constantly striving to improve the sustainability of our products and recently reinforced our efforts through obtaining UL Environment’s GREENGUARD Gold Certification. With the award of GREENGUARD Gold Certification, Extira will help building and design teams meet and exceed emissions criteria for various green building programs, such as LEED®, Living Building Challenge and ASHRAE. Architects, builders, home owners and interested parties can find JELD-WEN’s certified product portfolio on UL’s database, The SPOT.

As an accredited, third-party organization UL certifies products and materials for low chemical emissions and serves as a resource for choosing healthier products and materials for indoor environments. All certified products must meet stringent emissions standards originally developed for the US EPA and the State of Washington building projects. GREENGUARD Certification is broadly recognized and accepted by sustainable building programs and building codes around the world.

Looking for more information?

MiraTEC and Extira have a wide range of literature available for download and digital viewing. Use the button below to access the online publication library. If you would like printed materials, please contact us through this simple online form, or reach out to your MiraTEC representative. 

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