Fanfold Closed Cell EPS Foil Faced Insulation

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

Fan-Fold Closed Cell EPS Foil Faced 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.


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.

The Benefits Of Closed Cell EPS Insulation

By Mark Kearns • November 7, 2022
There's a reason EPS is overtaking other insulation options...

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Why Fan-fold Closed Cell EPS Foil Faced Insulation?

Closed Cell EPS Foil Faced 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. 


Closed Cell EPS Foil Faced 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 Closed Cell EPS Foil Faced Fan-Fold’s thermal performance (see table). Closed Cell EPS Foil Faced 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