Fanfold PolyShield Insulation

Wall insulation and underlayment that significantly reduces application labor costs while adding R-value to your exterior walls

Cellofoam Poly Shield® Fan-Fold is a wall insulation and underlayment that significantly reduces application labor costs while adding R-value to your exterior walls.


Cut in 24" panels along its 4' x 50' expanse, the insulation is easily transported accordion style and then rapidly unfolded flat and attached.


Poly Shield Fan-Fold is typically used on exterior walls as an insulative backer board for siding, but may also be used for other applications such as insulating interior or basement walls.



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Why PolyShield Fan-fold Insulation?

Poly Shield Fan-Fold is made of premium expanded polystyrene (EPS) rigid insulation that meets or exceeds the requirements of ASTM C578, Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation. The core EPS is composed of closed cells with excellent dimensional stability, compressive strength, and water resistance. Poly Shield Fan-Fold is faced with tough polymeric laminates on both sides for added strength and durability in storing, handling, and installation. Several different poly facer options are provided to meet project needs. These include printed polypropylene and polyester facers, as well as a metalized, reflective polypropylene. Properly installed with a dead air space, the reflective facer can provide a significant R-value boost to Poly Shield Fan-Fold’s thermal performance (see table). Poly Shield Fan-Fold is bundled accordion style, with each bundle covering 200 ft2 or two squares.

  • Labor & Material Savings
  • Stable R-value
  • Moisture Resistant
  • Premium Quality
  • Environmentally Friendly
  • Manufactured to your Needs

Technical Info