Do Siding Right the First Time. Add FullbackV.

Achieve lasting beauty, increase durability, and reduce energy use.

Beautiful Support for Vinyl Siding

Adding contoured insulation to siding helps support the panel, strengthening and maintaining its shape over time. Insulation also helps level the wall behind the siding, making the siding appear even straighter.

Curb Appeal & Close Appeal

Part of the close-up appeal that Fullback®V provides is the solid feel of real wood. The contoured insulation fills the gap between the siding and your wall, eliminating the hollow void and strengthening the panel.

Lasting Beauty

New siding is only a good investment if the beautiful appearance lasts. Ensure your vinyl siding will look great for decades by adding the support of contoured FullbackV insulation.

More than aesthetics

FullbackV protects more than just the appearance of vinyl siding.

Save Energy and Create a
More Comfortable Home

FullbackV adds an r-value of 2.0 - 3.5 to the siding, helping to save energy, reduce utility bills, and create a more comfortable home all year long! Adding insulation to the exterior of a home also helps dampen sounds from outside for a more enjoyable interior.

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Protect Against Impact Damage and Pests

The contoured shape of FullbackV completely fills the gap behind the siding, serving as a shock absorber to protect vinyl siding against cracking, denting, and breakage. Filling the gap eliminates space where pests can nest behind the siding, and Fullback is also treated with a safe insecticide to protect it from termites.

Take Control Of Moisture, Prevent Mold & Mildew

An average household produces 4-6 gallons of water vapor daily through activities like cooking & cleaning. FullbackV features a perm rating of up to 5.0, allowing moisture to escape the home. This reduces the chance of mold and mildew growth, creating a healthier home and longer lasting siding job.

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Interested in Even MORE Energy Savings?

Take energy savings to the next level with Neopor

FullbackV siding insulation is available in both white expanded polystyrene (EPS) and graphite-enhanced Neopor.
Neopor provides up to 20% more insulating value than standard EPS, allowing for more energy savings with the same amount of material. Learn more about Neopor



Specifications & Downloads


Dimensions = varies based on profile
R-value Range = 2.0-3.5 (varies based on profile)
Density = Minimum .90 lb/ft3
Water Vapor Permeanace = up to 5.0
Compressive Strength = Minimum 10 PSI
Flexural Strength = Minimum 23.5 PSI (EPS), minimum 25 PSI (Neopor)
For more information, download our data sheets >


Stories about Fullback V

Did You Know? Insulated Vinyl Siding Leads the Industry for Performance

July 17, 2014

Although vinyl siding has been around for decades, that doesn’t mean it’s “old” technology. In fact, vinyl siding with?Fullback?V?insulation from?Progressive Foam?provides industry-leading performance characteristics that make it a cutting-edge contender. Vinyl siding with FullbackV is an excellent choice for applications where energy efficiency, durability, and low maintenance are priorities: – With an r-value of 2.0 […]

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Five Reasons You Need to Insulate New Vinyl Siding

January 22, 2014
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Updated LCA Report Proves Vinyl Siding Is Still One of the Most Environmentally-Friendly Siding Products

September 12, 2013

Updated LCA Report Proves Vinyl Siding Is Still One of the Most Environmentally-Friendly Siding Products A recent life cycle assessment (LCA) released by the Vinyl Siding Institute (VSI) confirms that vinyl still ranks as one of the most environmentally friendly exterior claddings. The full LCA report (found here), extensively covers the impact that siding products […]

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