If you’re looking to keep buildings comfortable and energy-efficient, roof insulation is what you need. Among the many options available, EPS (expanded polystyrene) roof insulation stands out as a smart choice for both commercial and residential projects. Lightweight, durable and highly effective, EPS insulation helps regulate indoor temperatures while lowering cooling costs, all without breaking the bank.
Why EPS Roof Insulation Works So Well
EPS is a closed-cell foam material that traps air within its structure and creates a barrier against heat transfer. This means it keeps warm air out in the summer and retains heat in the winter to reduce the workload on HVAC systems. Here’s what makes it such a strong performer:
- High R-Value: EPS provides excellent thermal resistance, typically ranging from R-3.6 to R-4.2 per inch, depending on density. This makes it one of the most effective insulation materials for controlling energy loss.
- Lightweight & Easy to Install: Unlike heavier alternatives, EPS boards are easy to handle and cut, speeding up installation and reducing labor costs.
- Moisture Resistance: EPS won’t absorb water, which means it won’t degrade over time or promote mold growth, a common issue with other insulation types.
- Long-Term Performance: Unlike some materials that settle or lose effectiveness, EPS maintains its shape and insulating properties for decades.
How EPS Roof Insulation Lowers Cooling Costs
One of the biggest benefits of EPS insulation is its ability to reduce cooling expenses. In hot climates, roofs absorb tremendous amounts of heat and force air conditioning systems to work harder. By installing EPS insulation, buildings stay naturally cooler.
This leads to:
- Lower energy bills: Reduced heat transfer = HVAC systems run less frequently.
- More consistent indoor temperatures: Fewer hot spots and drafts = improved comfort.
- Extended HVAC lifespan: Less strain on cooling systems = fewer repairs and replacements.
For commercial buildings with large roof surfaces, the savings can be substantial, often paying for the insulation investment within just a few years.
EPS vs. Other Roof Insulation Materials
While fiberglass, spray foam and polyiso are also used in roofing, EPS offers several advantages:
FeatureEPSFiberglassSpray FoamPloyiso
| Cost | Low | Moderate | High | High |
| Weight | Light | Moderate | Varies | Moderate |
| Moisture Resistance | Excellent | Poor | Good | Fair |
| R-Value per Inch | 3.6 – 4.2 | 2.9 – 3.8 | 6.0 – 7.0 | 5.6 – 6.8 |
| Ease of Installation | Very Easy | Moderate | Requires Pros | Moderate |
While spray foam and polyiso offer higher R-values, they come with higher costs and installation complexity. EPS strikes the best balance between performance, affordability, and ease of use, making it a go-to choice for many builders.
Custom Solutions for Better Drainage & Performance
At Benchmark Foam, we offer EPS roof insulation with tapered systems designed to improve drainage for certain applications. Standing water on flat roofs can cause structural damage and leaks, but our custom-cut EPS boards are shaped to direct water toward drains efficiently.
Key features of our tapered systems include:
- Factory-cut slopes, crickets and saddles: No need for on-site adjustments.
- Clear installation markings: Ensures correct placement every time.
- Compatibility with all major roofing systems: Works with single-ply, built-up and modified bitumen roofs.
We also offer 100% recycled EPS (eps360®), providing the same great performance while supporting sustainability efforts.
The Final Decision: EPS Roof Insulation Pays Off
EPS is a cost-effective and high-performing solution that delivers real energy savings. Because of its lightweight nature, moisture resistance and long-lasting thermal properties, it’s a favorite among contractors and building owners alike.
Ready to improve the energy efficiency of your building? Contact Benchmark Foam today to discuss EPS roof insulation options tailored for you.
