Custom Architectural Shapes

Molded Polystyrene

From columns to arches and cornices to window surrounds, high-performance architectural shapes have unlimited design possibilities and are used in stucco and Exterior Insulation and Finish Systems (EIFS). Our fabrication technology solves many construction and design challenges in addition to adding beauty to both residential and commercial buildings.

ACH Foam Technologies simplifies the design and estimating process by utilizing innovative computerized technology to accurately design and fabricate architectural shapes for your project. Standard and custom architectural shapes are produced with precision and consistency to shorten lead times.

All of our Architectural Shapes are manufactured with high-performance molded polystyrene. Material can be manufactured in a variety of densities to meet the needs of your project. Polystyrene meets tough exterior wall specifications and has been used in the construction industry for more than 30 years and is the preferred substrate for all stucco and Exterior Insulation and Finish Systems (EIFS), because it combines unlimited design potential with material strength and durability.

Custom architectural shapes are recyclable and environmentally friendly. It contains no CFCs, HCFCs, HFCs or formaldehyde and is chemically inert and safe to WTE systems.

Types of Shapes

Wall Caps
Keystones & Quoins
Logos & Signage
3-D Shapes
Available Upon


Unlimited Design Potential
Durable & Lightweight
Vapor Permeable
Easily Modified
Excellent Surface
High R-Value
Insect Resistant

Compatibility & Design

Polystyrene is approved by numerous acrylic, acrylic-modified and Portland cement-based stucco and EIFS products. Consult ACH Foam Technologies for more information. The following systems are listed by the EIFS Industry Members Association (EIMA): Polymer Modified Miner Combination Systems (PM), Acrylic and Mineral Combination Systems, Polymer-Base (PB) Acrylic Systems and Mineral-Base (MB) Cementitious Systems. Polystyrene can be specified in densities from 1 - 3 pounds per cubic foot. Very little weight is placed on a building, frequently eliminating the need for additional structural reinforcements. Polystyrene can be adhesively attached to a variety of substrates and provides excellent surface bonding for base coats. Consult your Stucco or EIFS manufacturer for installation procedures.

Design & Estimating

Architectural Shapes can be easily estimated and designed. Simple information such as overall height and width, in addition to any other pertinent interior dimensions will be needed for an estimate. All other interior dimensions will be scaled proportionately. Please contact your local design estimator for more information.

Quality Assurance,Building Codes, & Industry Standards

Every ACH plant has a quality-assurance program monitored by Underwriters Laboratories (UL). A quality-control manual is retained for inspection by code personnel and is verified by continuous in-plant material testing and independent laboratory sample testing. This procedure allows ACH to provide certified/code-listed polystyrene.

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