Does expanded polystyrene (EPS) present a serious fire hazard?
The EPS in an Fox Blocks has a flame retardant that allows the forms to be flame resistant. The EPS will melt when exposed to sustained temperatures over 300°F (149°C). The ignition point of the melted styrene is 600°F (315°C) (wood is approximately 500°F (260°C). Fox Blocks have been tested to meet the building code requirements for flame spread and smoke development, plus Fox Blocks may be used as fire resistant rated wall assemblies in schools and hospitals.
Does EPS ‘off gas’?
EPS does not off-gas. Fox Blocks forms do not and never have contained any CFC or HCFC products. The forms are made by a steam process that utilizes ‘pentene gas’ as a blowing agent. The blowing agent dissipates from the product within 48 hours of manufacturing. Fox Blocks forms are odorless, do not deteriorate, and do not off gas.

Building Stronger Hotels with ICF Blocks
Integrated Learning Center
Can you vibrate or consolidate the concrete in ICFs?
Yes, consolidation of the concrete is one of the key elements in the placement of concrete in an ICF wall. Fox Blocks recommends internal vibration with a pencil vibrator, quickly in and slowly out.

Let’s Talk About Our Foundation
Fox Blocks has been making insulated concrete forms since 2005. Our parent company, Airlite Plastics, was founded in 1946, and today, it is still a family owned business. Airlite produces plastic containers and insulated packaging products for a variety of industries, so we share knowledge of plastics innovation throughout the company.

Building Commercial Retail Developments with ICF Construction
Building commercial retail developments with ICF construction creates structures that are disaster-resistant, energy-efficient, environmentally-friendly, quiet, and durable.

Integrated Design in Architecture and Construction
In the field of architecture and construction, integrated design is a powerful solution that tackles the inefficiencies of traditional isolated processes. This approach combines different project elements under a unified vision, and proves particularly effective with Insulated Concrete Forms (ICF) like those from Fox Blocks. By using ICF, the building process becomes more efficient and collaborative.

ICF Basements 101: Everything You Need to Know Before You Build
Case Studies