Our all new EPS 400

Why Understanding Your kPa Requirement Matters for Low-Profile UFH Systems

When specifying insulation for underfloor heating (UFH), one key factor that should never be overlooked is compressive strength — measured in kilopascals (kPa). While much of the conversation around UFH focuses on heat output and efficiency, the structural performance of the insulation layer plays an equally critical role, particularly in modern low-profile systems.

What is kPa and Why Does It Matter?

kPa is the amount of pressure or stress that a material can handle before it begins to compress. In a UFH system, insulation must support not only the system itself, but also ongoing loads from foot traffic, furnishings, and the chosen floor finish.

If the insulation compresses over time, it can lead to movement within the floor structure.

This risks damaging floor coverings, reducing system lifespan, and compromising overall performance. That’s why ensuring the correct kPa rating is essential — especially when working with slim, retrofit-friendly systems where there is less material depth to distribute load.

The Challenge of Low-Profile UFH

Low-profile UFH systems are increasingly popular in both renovation and new-build projects, where minimising floor build-up is critical. However, thinner systems demand higher performance from every component — particularly the insulation.

With less thickness available, the insulation must deliver:

·        High compressive strength in a reduced depth

·        Consistent support across the entire floor area

·        Stability under a variety of floor finishes

This is where material selection becomes crucial. Not all EPS insulation is equal, and lower-density options may not provide the durability required for long-term use in these applications.

Epic Insulation Profoil EPS400: Strength Meets Efficiency

Epic Insulation’s Profoil EPS400 is specifically designed to meet the demands of modern low-profile UFH systems. This moulded EPS panel offers a true 400 kPa compressive strength, ensuring exceptional load-bearing performance despite its slim design.  Additionally, moulded foam doesn’t suffer from weakening of the board from routing as the grooves are preformed rather than taking material away from an existing unrouted board.

At just 20mm thick, Profoil EPS400 keeps floor build-up to an absolute minimum, making it ideal for projects where height restrictions are a concern. The board is precision moulded with grooves for 16mm pipe at 150mm centres, allowing for fast, accurate installation and consistent pipe spacing.

This integrated design removes the need for additional fixing systems, simplifying installation while maintaining structural integrity across the floor.

Premium Foil Finish for Versatility

A key feature of Profoil EPS400 is its 100-micron foil facing which is lined into the groove. This high-quality reflective layer enhances heat distribution while also providing a robust, stable surface for a wide range of floor coverings.

Working alongside market leaders such as Mapei and Bostik, Epic Insulation has ensured that Profoil EPS400 is compatible with a multitude of floor finishes, giving installers and specifiers complete confidence in its versatility.

Suitable floor finishes include:

·        Ceramic & Porcelain Tiles

·        Engineered, Parquet & Solid Wood

·        Sheet vinyl

·        LVT

·        Carpet and Carpet Tiles

This flexibility allows designers to achieve the desired aesthetic without compromising performance or increasing floor height.

Why a 400 kPa Rating Makes the Difference

By choosing an insulation board with a 400 kPa rating, you are effectively future proofing your UFH system. It provides:

·        Confidence that the system will not compress under load

·        Long-term dimensional stability

·        Compatibility with both domestic and light commercial applications

Rather than trying to calculate minimum requirements for different scenarios, Profoil EPS400 delivers a single, high-performance solution suitable for all common use cases.

The Smart Choice for Modern UFH

Understanding your kPa requirement is not just a technical detail—it’s fundamental to the success of your UFH installation. In low-profile systems especially, selecting a high-strength insulation like Epic Insulation Profoil EPS400 ensures you achieve both performance and longevity without compromising on floor height.

For projects where every millimetre counts, and reliability is non-negotiable, Profoil EPS400 offers the perfect balance of strength, efficiency, and versatility.