When insulating & managing moisture is a top priority, we've got you covered.

HalfbackH20 features built-in drainage grooves to keep the wall dry.

  • Moisture-Management
  • house-siding
  • insulation-fiber-cement
Maximum Moisture Management

HalfbackH20 features built-in moisture management grooves that allow bulk water to efficiently drain down the wall and away from the home.


The flat face of HalfbackH20 makes it is versatile enough to be used with any kind of siding, including fiber cement, engineered wood, shakes, scallops, and stone.

Manages Water Vapor

An average household produces 4-6 gallons of water vapor inside daily. HalfbackH20 features a perm rating up to 3.5, allowing moisture to escape the home. This reduces the chance of mold and mildew growth, creating a healthier home and longer lasting siding.

HalfbackH20 does more than manage moisture.


Save Energy and Create a
More Comfortable Home

HalfbackH20 adds an r-value up to 5.0 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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Levels the Wall for
Improved Appearance

Adding HalfbackH20 siding insulation helps level the wall behind new siding, reducing the visibility of imperfections in the wall that otherwise might create a less-than-perfect appearance.


Protect Against Damage From Pests

HalfbackH20 siding insulation is treated with PREVENTOLTM EPS, a safe insecticide which protects the foam from termite damage. This provides an extra layer of defense between your home and mother nature.

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Interested in Even MORE Energy Savings?

Take energy savings to the next level with Neopor

Halfback H2O 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


White EPS

EPS is a closed cell, rigid foam insulation made of 98% air and 2% plastic. EPS has been proven to be a safe material which provides excellent thermal insulation properties.


Neopor® has similar properties to EPS, but contains high-purity graphite particles which reflect heat as it passes through the insulation, slowing it down. This graphite gives our Premium Series insulation its super-efficiency and dark gray color.

Specifications & Downloads


Dimensions = 4'x4' and 4'x8'
EPS Thicknesses = 3/4" (R-2.3) and 1" (R-3.3)
Neopor Thicknesses = 3/4" (R-3.0), 1" (R-4.0) and 1-1/4" (R-5.0)
Density = Minimum .90 lb./ft3
Water Vapor Permeance = Up to 5.0
Compressive Strength = Minimum 10 PSI
Flexural Strength = Minimum 25 PSI

Stories About HalfbackH20

HalfbackH20: Insulation for Maximum Moisture Management

June 11, 2014

  HalfbackH20 is a general siding insulation product that not only insulates your home, but also provides an extreme level of?protection against bulk water that may accumulate on the sheathing surface. How It WorksHalfbackH20 is a closed cell, rigid siding insulation with drainage grooves for enhanced moisture management. The grooves are built into the back […]

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Mold Remediation Remodel Uses HalfbackH20

May 1, 2013

HalfbackH20 Premium Siding Insulation Installed Under Fiber Cement During Mold Remediation Remodel ?We believe that HalfbackH20 Premium is the perfect product for us to add insulation to these remodeled homes while resting easy knowing it will help effectively manage moisture from day one.” -Joe Yurick, General Manager Atlantic Remediation and Restoration Contractors (ARRC) in Pennsylvania […]

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