Your Top Questions About Reclaimed XPS, EPS, & Polyiso Answered
For sustainable and cost-effective building solutions, consider Green Insulation. As a leading distributor of quality reclaimed XPS and EPS rigid foam panels, we are proudly based in Worcester, Massachusetts, and serve the entire New England region. Discover our inventory and see how reclaimed insulation can benefit your next project.
Your Definitive Guide to Reclaimed Foam Insulation
Choosing reclaimed insulation is a smart, sustainable decision for any building project. Still, it’s natural to have questions about using a material that’s had a previous life. Is it as effective as new? What will it look like? Is it difficult to install?
This guide is designed to be your go-to resource for clear, honest answers to all those questions and more. We believe in transparency and want you to have all the facts. By the end of this article, our goal is for you, whether you’re a seasoned contractor, a dedicated builder, or a hands-on DIY homeowner, to have the confidence and knowledge to decide if reclaimed insulation is the right fit for your project. As experts in the field, the team at Green Insulation is here to share what we know.
Does reclaimed insulation lose its R-value over time?
This is one of the most common and important questions we hear. The great news is that rigid foam insulation, like XPS, EPS, and Polyiso, has a very stable R-value. While some minimal R-value loss can occur in foam boards, this happens very early in the product’s lifecycle. By the time the material is reclaimed, its R-value has stabilized and will remain consistent and reliable for decades to come. You can count on it to provide excellent thermal performance for the life of your building.
To learn more about how thermal performance is measured, you can read our Ultimate Guide to R-Values and Thermal Performance.
Is reclaimed foam as durable and strong as new panels?
Absolutely. The durability of closed-cell rigid foam comes from its structural integrity, which is not compromised by its typical previous use on a commercial roof. These panels retain their impressive compressive strength, making them more than strong enough for common applications like insulating basement walls, foundation exteriors, and under concrete slabs.
How does reclaimed insulation handle moisture?
One of the key advantages of closed-cell foam like XPS and EPS is its inherent resistance to moisture. This property is not diminished over time or through its previous application. This makes reclaimed rigid foam an ideal choice for any area that may be exposed to dampness, such as basements and foundations. Its ability to resist water absorption helps prevent mold and mildew and protects the integrity of your structure.
For a deeper dive into the different material types, check out our comparison: XPS vs. EPS vs. Polyiso: Which is Best for Your Project?
Where does reclaimed insulation actually come from?
The vast majority of our reclaimed insulation is sourced from large, flat commercial and industrial roofs that are being replaced. During this process, large sections of high-quality rigid foam are carefully removed. Because these panels come from well-maintained systems, they are typically in excellent condition and provide a consistent, reliable source for top-tier insulation.
We take pride in our process, which you can learn more about in The Green Insulation Advantage: Our Quality & Sourcing Promise.
What will the panels look like? Will they have holes or blemishes?
This is where honesty and managing expectations are key. Because the panels have been previously installed, they are not cosmetically perfect like new boards. You can expect minor imperfections, which may include small fastener holes, slight scuffs, pressure marks from fasteners, or remnants of branding and lettering from their original use. We want to be clear that these blemishes are purely cosmetic and do not negatively impact the panel’s thermal performance or integrity in any way.
How are the panels processed and inspected?
Once the insulation arrives at our facility, every panel undergoes a quality control process. Our team inspects the foam and sorts it by type, thickness, and overall condition. We ensure the material meets our standards before stacking it and storing it safely, ready for its next use in your project.
How much money can I really save with reclaimed insulation?
The cost savings are one of the most compelling reasons to choose reclaimed insulation. Customers can often save 40-60% compared to the price of brand-new panels from a big-box store. This significant price reduction can make a huge difference in your project budget, allowing you to afford a higher R-value or reallocate funds to other parts of your build.
Is it a better long-term value than other insulation types?
When you look at the big picture, reclaimed rigid foam offers exceptional long-term value. Its upfront cost is highly competitive, and its lasting, high R-value and moisture resistance provide superior performance compared to materials like fiberglass, especially in moisture-prone areas like basements. It’s an investment that pays off in both immediate savings and long-term energy efficiency.
Where are the best places to use reclaimed rigid foam?
Reclaimed rigid foam is incredibly versatile. It is an ideal solution for insulating basement walls (both interior and exterior), foundations, under concrete slabs, in agricultural buildings like barns and sheds, and for workshops. It’s also great for exterior wall sheathing and any application where a durable, high-performance insulation board is needed.
Are there any special steps for installing used foam panels?
Installation of reclaimed panels is virtually identical to working with new rigid foam, requiring no special tools or advanced skills. You’ll use the same standard methods: a sharp utility knife and a straight edge for cutting, a compatible foam board adhesive for attachment, and proper seam tape for sealing the joints. The key steps of measuring, cutting, adhering, and sealing are all the same. The minor fastener holes you might see from the boards’ previous life are purely cosmetic and become a non-issue. Once the panels are installed and the seams are taped, you create a continuous thermal layer. The final wall covering, such as drywall, completely conceals these minor imperfections and provides the finished look.
For a complete walkthrough, see our DIY Guide: Installing Reclaimed Rigid Foam Panels for Basement Insulation.
Do I still need a fire barrier over reclaimed foam?
Yes, absolutely. This is a critical safety requirement that does not change. All building codes mandate that rigid foam insulation, whether new or reclaimed, must be covered by an approved thermal and fire barrier when installed on interior living spaces. The most common solution is 1/2-inch drywall. Always consult and comply with your local building codes.
Build with Confidence and Sustainability
As you can see, reclaimed rigid foam insulation is a high-performance, cost-effective, and reliable material that stands up to scrutiny. By choosing to build with reclaimed panels, you are making a smart decision that benefits not only your budget but also the environment by keeping valuable materials out of the landfill. You can move forward with your project confidently, knowing you’re using a product that delivers on all fronts.
Ready to start your project?
Browse our current inventory of reclaimed XPS, EPS, and Polyiso panels to find the perfect fit for your needs and budget. The team at Green Insulation is here to help you build smarter and more sustainably. Call Us Now!