As many states prioritize energy efficiency and sustainability, it becomes important to think outside the box, and consider materials you may not have otherwise worked with as a way create these “net zero” homes.
One type of product that many architects are finding is the right choice for their needs is architectural EPS: cemented coated EPS core products that contribute to energy efficiency, and are lightweight, lower cost, and easy to customize.
There are many reasons you may want to consider switching out other materials to architectural EPS, as it has a lower environmental impact than heavier, resource-intensive materials like precast or quarried stone, particularly in transportation and installation.
What Are the Net Zero Strengths of Architectural EPS?
Expanded Polystyrene (EPS), when used in architectural components with a cementitious or protective coating, has several qualities that can contribute positively to net zero goals. While it is not a structural replacement for concrete or steel, it does provide meaningful advantages in the areas of energy efficiency, transportation, and lifecycle sustainability.
- Thermal Performance – EPS is an insulating material with a high R-value per inch of thickness. When used in exterior cladding, trim, or other building elements, it can reduce thermal bridging and contribute to the overall energy efficiency of the building envelope. EPS is unique in that it has a high and permanent R-value (typically R-4 to R-5 per inch). Unlike some materials, it does not settle or degrade over time, and its insulating performance is not dependent on trapped gasses that can diffuse out.
- Lightweight Properties – Compared to stone, precast, or other dense materials, EPS is significantly lighter. This reduces fuel consumption during transportation and often allows for easier installation, minimizing the labor and equipment needed onsite.
- Lower Material Waste – EPS can be cut and shaped with precision, reducing waste during fabrication. Some EPS used in construction can also include recycled content, further lowering its environmental impact.
- Durability with Coatings – When properly coated, EPS components can be resistant to weather, moisture, and pests, providing a long service life with relatively low maintenance needs. This contributes to the longevity goals often built into net zero planning.
- Cost-Effectiveness – Because EPS is more affordable than natural stone or precast alternatives, it makes energy-efficient detailing and design more accessible without requiring significant additional resources.
Now, EPS products are not load bearing. They are solely decorative. This means they can only be a part of the net zero goal, not a focal point. EPS products are best viewed as one tool among many in achieving net zero goals. Their lightweight nature and insulation properties make them particularly effective for:
- Exterior trim, cornices, and cladding that require additional thermal performance.
- Projects where transportation impacts and installation time need to be minimized.
- Applications where long-lasting, low-maintenance detailing is a priority.
For architects and builders aiming to design net zero homes, architectural EPS can be a smart substitution for more resource-intensive materials in non-structural applications. While it is not a complete solution on its own, its energy efficiency benefits, combined with cost savings and reduced environmental burden during transportation and installation, make it a legitimate option in sustainable construction planning.
