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Thermalboard EPS Insulated Radiant Floor Underlayment

Thermalboard EPS 2024

Heat Up, Not Down.

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Radiant Panel Integrated Insulation

Heat up, not down. Thermalboard EPS combines our traditional panels with an underlayment of EPS insulation. This unique combination directs heat where you want it most.

  • Insulating. Sound Dampening.
  • High Compression. High Impact Assembly. Flooring goods friendly.
  • Water/ Mold Resistant EPS Foam. MR 30 moisture resistant substrate
  • Raised Floor: No double plating required. Staple/Screw to subfloor
  • Over Slab: Glue or shoot to concrete. Easy Install.
Thermalboard EPS Insulated Panels Side View

New & Existing Slab • Garage • Basement

Thermalboard EPS Over Concrete

Over Uninsulated Subfloor

Thermalboard EPS Over Subfloor

Two Standard Models*

Standard R 2.25 and R 5.2 Value.

*Special order versions with higher R value available.

Thremalboard R 0.5

R 0.5

Thermalboard EPS R 2.3

R 2.25

Thermalboard EPS R 5.2

R 5.2

WBI Radiant Panel Manufacturer and mechanical engineering firm Monterey Energy Group discuss modern radiant floor heating.

Radiant Floor Heating in Custom Homes

With passion and expertise, our guests discuss how hydronic radiant floor systems can influence a project’s score on the Active House Radar, providing valuable insights into the benefits of this innovative technology.

Whether you’re an architect, builder, or simply interested in cutting-edge sustainable solutions, this episode is a must-listen.

Thermalboard Performance

Thermalboard is a highly efficient, fast responding radiant heat panel system. Our system was designed to supply lower water temperatures resulting in lower operating costs to the owner. Our fast response system allows for rapid heating up and cooling down for easy control and comfort.

ThermalBoard Heat Flow Density Chart

Zero Formaldehyde

Zero VOC Adhesives

Dense & Durable

Recycled Aluminum

Thermalboard Performance Chart

Thermalboard Energy Efficiency

While energy efficiency may not be a feature of sustainability, it is a desirable feature for green homes. Thermalboard aluminum laminated low mass system is a highly efficient method for delivering hydronic heat, making our product part of broad-based carbon reduction strategies and an excellent technical partner with geothermal and air to water heat pumps in achieving Net Zero Energy building solutions.

Compatible with Most Flooring Goods

We provide detailed instructions & graphics for installation over most floor coverings. Thermalboard works with most flooring goods including:

  • carpet
  • tile
  • stone
  • hardwood
  • marble
  • laminate
  • vinyl
  • ceramic
  • brick
  • concrete
  • wool
  • urethane
  • bamboo
  • thinset mortar
  • cork
  • rubber
  • softwood
  • sheet vinyl
  • linoleum
  • + more
Thermalboard Eureka Cost Effective Radiant Heat Panels

Cost Effective Radiant Floor Heat

Thermalboard is far less expensive than integrated structural plywood radiant panel systems and many other panel systems with equal performance in independent testing. An excellent alternative to gypcrete and cement.

Ideal with Hydronic Heat Pump Systems.

ThermalBoard is a low supply water temperature panel.

Installation Videos

Follow the guide for a quick installation overview of Thermalboard. For more detailed instructions you can download our free Installation Manual here.

DIY Installation Guide with Step by Step Instructions

Step by Step DIY Installation Guide

Need more installation tips? Check out this step-by-step guide!

Easy Installation with Thermalboard


Higher Efficiency


Fast Responding


Low Profile (5/8″)


Low Water Temp

Design & Layout CAD Services

Each project receives a board layout for accuracy and ease of installation. We also offer optionally complete mechanical design services. We offer both a CAD panel layout service and a complete system design service. Virtually all projects select our panel layout service with some choosing a full turnkey system mechanical design and specification.

Optional PEX / Manifold & Mechanical System

Optional PEX Tubing
Optional Mechanical System Available
Optional Manifold System Available
Douglas Danner

Free project estimate factory direct to your jobsite. 

Call (866) 414-7244 for specifying assistance or more information.