PIR Insulation Boards Demystified: A Buyer’s Guide


When it comes to home improvement or constructing a new building, insulation might not be the most exciting topic, but it’s certainly one of the most crucial. Among the various insulation materials available, PIR insulation boards are gaining popularity due to their exceptional thermal performance and versatility.

In this buyer’s guide, we’ll break down the complexities and help you make an informed decision when selecting PIR insulation boards for your project.

Understanding PIR Insulation


Let’s start with the basics. PIR stands for polyisocyanurate, which is a type of rigid foam insulation. It’s known for its outstanding thermal efficiency, making it a top choice for keeping your home cosy and energy-efficient.

Advantages That Make This Option Stand Out from the Rest

  1. High Thermal Performance: PIR insulation has a high R-value. Think of R-value as the insulation’s ability to resist heat flow. The higher the R-value, the better it insulates. If you live in a cold climate, choosing PIR insulation with a high R-value will help keep your heating bills down in the winter.
  2. Compact Thickness: PIR insulation boards offer excellent thermal performance without the need for thick layers. This is particularly beneficial in projects where space is limited. If you’re insulating the walls of an old house with narrow cavities, PIR insulation boards can fit snugly and efficiently.
  3. Moisture Resistance: PIR boards have a closed-cell structure that resists moisture absorption, making them ideal for damp environments like basements or bathrooms. If you’re insulating a basement, PIR insulation boards can help prevent mold growth.

Factors to Consider When Buying


Now, let’s dive into the key factors to consider when buying boards.

Thermal Performance (R-value)

The climate you live in greatly influences your choice of PIR insulation boards. If you’re in a cold climate, you’d want a higher R-value. In contrast, a milder climate may require a lower R-value.

Thickness and Size Options

The space you are insulating and the desired effect will determine the thickness of the boards you should purchase. Usually speaking, boards that are thicker will perform better. However, you will need to make the best compromise between cost and performance because thicker boards can be more expensive.

To achieve the optimal U-Value of 0.17 W/m2K, boards that are 100mm thick are recommended. On the other hand, if there isn’t much room, 50 mm of thickness can be used. That said, in order to strike the best balance, 75mm PIR insulation boards are recommended because they offer the most cost-effective solution. The 75mm PIR insulation boards are thick enough to provide a boost in energy efficiency, without taking up a lot of space or being too costly for your budget.

Standard sized boards are available, but for some projects, custom sizes might be needed. When insulating a unique-shaped attic or crawl space, custom-sized PIR boards can be tailored to fit perfectly.

Facing Materials

PIR boards often come with different facings that serve various purposes. For instance, a foil facing can act as a vapour barrier in a bathroom, preventing moisture from seeping into the insulation.

Fire Resistance and Safety

Always check for fire ratings and compliance with local building codes. If you’re using PIR insulation in a commercial kitchen, you need fire-resistant PIR boards to meet safety standards.

Sustainability and Environmental Impact

Consider eco-friendly options if you’re environmentally conscious. Opting for PIR boards with recycled content can reduce your project’s carbon footprint.

PIR Insulation Board Applications

Now that you understand what to look for let’s explore the various applications of these boards:

1. Residential Applications:

  • Wall Insulation: PIR boards can be used in wall cavities to keep your home cosy. Imagine enjoying a warm and snug living room in the middle of winter.
  • Roof Insulation: Installing these boards in the attic can prevent heat from escaping through the roof. No more icy drafts in the upstairs bedrooms!
  • Floor Insulation: Keep your toes toasty by insulating your floors with PIR boards. Who wouldn’t love stepping onto a warm bathroom floor on a chilly morning.

2. Commercial and Industrial Applications:

  • HVAC Systems: PIR insulation helps maintain controlled temperatures in commercial buildings.
  • Cold Storage: PIR boards are perfect for insulating refrigerated warehouses and cold storage facilities. Your ice cream stays perfectly frozen until it reaches the grocery store.
  • Exterior Cladding: PIR insulation boards can be used beneath cladding to improve a building’s energy efficiency. A well-insulated store reduces energy costs, making goods more affordable for customers.

Installation and Maintenance Tips

Your journey doesn’t end with the purchase. Here are some installation and maintenance tips:

Proper Installation Techniques: Follow the manufacturer’s installation guidelines to ensure maximum effectiveness. Incorrect installation can result in gaps and reduced insulation performance.

Maintenance Considerations: PIR insulation boards typically require minimal maintenance, but inspect them periodically for damage. Damaged boards can compromise your home’s energy efficiency.

Ensuring Long-Term Effectiveness: Maintain the integrity of your insulation over time by addressing any issues promptly. Fixing a small tear in the facing material can prevent moisture infiltration.

To Sum Up

Insulating materials may not be the most exciting topic, but they play a crucial role in keeping buildings comfortable and energy-efficient. By understanding the factors to consider, assessing your project’s needs, and seeking expert advice, you can make an informed choice when buying PIR insulation boards.

Remember, a well-insulated space not only keeps you cosy but also saves you money on energy bills in the long run. So, demystify the world of PIR insulation and make the right choice for your next project!