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HYDROFOAM Radiant Heat Insulation

HYDROFOAM® maximizes radiant heat insulation for residential projects by ensuring the heat is dispersed evenly throughout the entire floor area, providing homeowners with a more comfortable living and working environment.

Nudura innovation continues with HYDROFOAM®. Installation is fast and easy compared to traditional radiant heat insulation, which requires multiple steps to run radiant heat piping. The 4’ x 4’ (1.2 m x 1.2 m) boards are 2 1/2“(64 mm) thick and easily installed with an overlapping interlock on all four sides, ensuring the boards are locked in place during installation.

HYDROFOAM® utilizes a 360° multi-directional friction fit anchor system in which radiant heat piping is easily stepped into place in any direction required. It offers installers a lightweight, and high density expanded polystyrene (EPS) radiant heat insulation product that increases installation speeds, is easily cut to meet any angle or radius while providing R-10 of insulation value.


  • Insulation under the concrete slabs
  • 4' x 4' (1.2m x 1.2m) molded boards
  • Only 4" (100mm) from base to nubs
  • Available thicknesses: R-10 (RSI 1.76, U-value 0.57), 3" (76mm) - R-12.6 (RSI 2.22, U-value 0.45), 4" (100mm) - R-16 (RSI 2.82, U-value 0.35)
  • Multi-directional anchoring
  • Compatible with 1/2" (13mm) and 5/8" (16mm) diameter radiant tubing
  • Radiant tube spacing is based on 3" (76mm) increments
  • Shiplap/interlocking on all 4 sides
  • Eco-friendly - No CFCs of HCFCs
  • 100% recyclable
  • Resistant to water and moisture
  • Qualifies as low emitting materials**

**Conforms to LEED 4.1 CPDH testing standards. 


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Information Sheet Product Catalogue Technical Data



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