Thermadeck Insulated Decking

ThermaDeck is composed of a continuous core of rigid foam insulation laminated between two layers of structural board. The result is a simple, fast, high efficient decking system that provides superior thermal performance and substantially greater strength than conventional stud construction. Our thermal poly deck system consists of panels with 3.5″, 5.5″ and 7.25″ core of insulation sandwiched between two 1/2″ Oriented Strand Boards giving our Therma-Deck a 25% better insulated rating than conventional flooring construction. ThermaDeck eliminates costly foundation work and finished surfaces can receive carpet, laminate, tile or almost any type of flooring. Framing, insulation and vapor barriers are all manufactured at Sunspace and our Dealers are trained in the production and installation of all decking products. This reduces labor costs and ensures that you receive a high quality thermal decking system. All panels are laminated in our factory to the size and specifications needed for your job and the deck is assembled on site using a basic tongue and groove style.

Why use Thermadeck?

  • Reduced labor costs, high level insulation. Framing, insulation and vapor barrier all manufactured at Sunspace, delivered on site via the local dealer for immediate installation.
  • Thermal decks have been ULC tested and proven to be as much as two times stronger than 2x4 and 2x6 wood frame construction. 
  • Can any type of flooring be used on top of the Thermadeck? Yes! Carpeting, laminate or hardwood. Your choice of flooring can be added!
  • No painting
  • No pests
  • No warping
  • Leak Proof
  • Slip Resistant
  • Flex resistant
  • Sag resistant

Specifications & Engineering

  • ULC tested
  • 2 times stronger than 2×4 and 2×6 wood frame construction
  • Panels 48″ wide and up to 24′ high
  • R values:
    • 4 1/2″ -R17
    • 6 1/2″ -R26
    • 8 1/4″ -R35
  • 7/16″ OSB skins with EPS core
  • Panels designed to receive standard size lumber


  • Home
  • Cottage
  • Commercial


Available in Sand and Grey.