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When it comes to keeping homes warm and energy-efficient, insulation plays a key role. Among the wide range of insulation materials available today, polystyrene insulation sheets stand out as one of the most cost-effective solutions on the market. Known for being lightweight, moisture-resistant, and affordable, polystyrene is a popular choice for DIY enthusiasts and large-scale building projects alike. However, it’s important to understand its limitations when compared to higher-performance materials such as Recticel PIR insulation boards.
Polystyrene insulation comes in two main forms – expanded polystyrene (EPS) and extruded polystyrene (XPS). Both types provide effective thermal insulation and are commonly used in walls, floors, roofs, and external wall systems. EPS insulation, such as Jablite EPS70, EPS100, and EPS150, offers different levels of density and compressive strength to suit various building applications.
One of the biggest advantages of EPS insulation is its low cost. Compared to many other insulation materials, including PIR boards, EPS is inexpensive to produce and easy to handle, making it ideal for budget-conscious projects or large developments where affordability is key.
Polystyrene is a versatile product that can be used across multiple areas of construction. It’s particularly effective in:
Because it’s easy to cut and install, polystyrene is a favourite for DIYers and tradespeople looking for a quick, cost-effective solution. It’s also recyclable, which makes it a more sustainable option than many expect.
While polystyrene insulation performs well in many settings, it’s less thermally efficient than Recticel PIR insulation boards such as those made by Recticel. PIR (Polyisocyanurate) offers a significantly lower thermal conductivity – meaning you need thinner boards to achieve the same U-value. In practice, this allows for slimmer wall and roof build-ups, freeing up valuable space while providing better insulation performance.
For projects where achieving top energy ratings or Building Regulations compliance is a priority, PIR insulation is often the better long-term investment. However, if your goal is to insulate quickly and affordably, polystyrene boards are a reliable, budget-friendly option.
Ultimately, the choice between polystyrene insulation and Recticel PIR insulation depends on your project requirements and budget. EPS insulation provides great value and solid performance for many standard applications, while PIR offers superior thermal efficiency and space-saving advantages.
At Cut Price Insulation, we stock a full range of both materials — from cost-effective Jablite EPS boards to high-performance Recticel PIR insulation. Whichever option you choose, you’ll get top-quality products at unbeatable prices with fast delivery.
