Wall Specification Grade Molded Polystyrene

For Use in Exterior Insulation Finish Systems (EIFS)

ACH Foam Technologies’ molded polystyrene solves many construction and design challenges, in addition to adding beauty to residential and commercial buildings. ACH Foam Technologies' molded polystyrene has unlimited design possibilities, making it the perfect insulation for Exterior Insulation Finish Systems (EIFS), Stucco Exterior Wall Systems, and Architectural Shapes.

Foam-Control® WSG (Wall Specification Grade) is the preferred insulation and architectural shape component for Exterior Insulation and Finish Systems (EIFS).

Foam-Control® is manufactured under an industry leading quality control program monitored by UL and further recognized in ICC‑ES Evaluation Report ER-1006 and UL Evaluation Report UL ER11812-01.  Foam-Control® WSG meets ASTM C578, “Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation.” Foam-Control® WSG meets ASTM E2430, “Standard Specification For Thermal Insulation Boards For Use In EIFS”.

Foam-Control® WSG is compatible with various EIFS coating types

  • Polymer Modified (PM) systems
  • Polymer Base (PB) systems
  • Cementitious systems
ACH Foam Technologies' simplifies the design and estimating process for Architectural Shapes by utilizing innovative computerized technology to accurately design and fabricate the material for your project. Shorter shipping distances and production lead times combined with a product that is durable and easy to handle, will help save time and money.

Benefits of Foam-Control® WSG for EIFS

  • Unlimited Design Potential
  • Environmentally Friendly
  • Durable & Lightweight
  • More R-Value for Less Money
  • Time & Labor Savings
  • Termite Resistant
  • Moisture Protection
  • High R-Value
  • Excellent Surface Bonding
  • Easily Modified at the Jobsite
ACH Foam Technologies' polystyrene is approved by all major EIFS and Stucco Manufacturers in the United States. These products include the following wall claddings: Polymer Based Acrylic (PB), Polymer Modified Mineral (PM) and Mineral Based (MB).

Polystyrene is recyclable and environmentally friendly.  It contains no CFCs, HCFCs, HFCs or formaldehyde and is chemically inert and safe for WTE systems.

Installation of Wall Specification Grade Polystyrene for EIFS

Consult your EIFS or Stucco manufacturer and the local building codes for proper installation procedures.


Thorough fire-safety evaluations conducted by independent laboratories combined with ACH’s technical manufacturing expertise and superior quality control, assures our customers receive a consistently outstanding product. ACH Foam Technologies provides quality UL labeled polystyrene.