Most popularSaleCelotex
Celotex PIR Insulation Board - 2400mm x 1200mm - All Thicknesses
From £10.95 GBP£12.64Unit price /Unavailable
Most popularSaleRecticel
Recticel General Purpose Insulation Board - 2400mm x 1200mm - All Thicknesses
From £10.95 GBP£12.04Unit price /Unavailable-
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Ecotherm
Ecotherm Eco-Versal - 2400mm x 1200mm - All Thicknesses
From £10.95 GBP£12.04Unit price /Unavailable -
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General Purpose
General Purpose PIR - 2400mm x 1200mm - All Thicknesses
From £10.95 GBP£12.04Unit price /Unavailable -
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Kingspan
Kingspan Thermapitch TP10 - 2400mm x 1200mm - All Thicknesses
From £92.00 GBPUnit price /Unavailable
A Cost Effective Solution for Superior Thermal Performance
These high-performance rigid foam boards help reduce energy costs, improve building durability, and provide superior thermal performance compared to most slabs and rolls on the market. Their excellent insulating properties make them an ideal choice for a variety of applications, including walls, floors, and roofs.
Best Uses for PIR Insulation
Walls
PIR insulation is an excellent choice for walls, offering a thickness range of 25 mm to 150 mm. This variety allows for the ideal balance between space efficiency and thermal resistance. Using PIR insulation up to 150 mm thick ensures high R-values, which meet stringent energy efficiency standards while preserving valuable interior space.
Roofs
For roofs, which are a significant source of heat loss, PIR insulation boards with thicknesses of 100 mm to 150 mm are recommended. These thicker boards provide exceptional thermal resistance, essential for maintaining a consistent indoor temperature and improving overall energy efficiency. Whether used in flat or pitched roofs, PIR insulation helps prevent heat loss and enhance building performance.
Floors
PIR insulation is also effective for floors, with thicknesses typically ranging from 25 mm to 150 mm. For solid floors, 75 mm to 100 mm thicknesses are commonly used, while suspended floors benefit from 50 mm to 75 mm insulation. This range ensures minimal heat loss and supports structural integrity, keeping floors warm and energy-efficient.
Popular PIR Thicknesses
25mm PIR insulation boards are often used in applications where minimal insulation is needed or where space is limited. They are ideal for improving thermal performance in internal walls or as an additional layer over existing insulation. 25mm is alos used as an upstand around the perimeter of the floor and to prevent cold bridging by fitting across the top of another board for walls and roofs.
50mm PIR insulation boards are commonly used for both walls and floors. They provide a good balance of thermal resistance and space efficiency, making them suitable for a variety of building projects, including both new constructions and refurbishments.
70mm PIR insulation boards offer enhanced thermal performance compared to thinner options. They are particularly effective in applications where additional insulation is needed without taking up too much space, suitable for walls, floors, and roofs.
100mm PIR insulation boards are frequently used in both walls and roofs. They offer substantial thermal resistance while being space-efficient, making them suitable for a wide range of building applications, including new constructions and renovations.
120mm PIR insulation boards are ideal for solid floors, pitched roofs, flat roofs, masonry walls, and steel or timber-framed systems. Easy to handle and install, they offer excellent thermal properties, enhancing energy efficiency and maintaining consistent indoor temperatures.
150mm PIR insulation boards are particularly effective for roofs, especially flat roofs. This thickness provides superior thermal performance, crucial for areas with high external temperature fluctuations. It ensures minimal heat loss and maximises energy efficiency.
Frequently Asked Questions
What is PIR insulation?
What is PIR insulation?
PIR (Polyisocyanurate) insulation is a type of rigid foam insulation known for its high thermal performance and fire-resistant properties. It is used to enhance energy efficiency and reduce heat loss in buildings.
What happens if PIR insulation gets wet?
What happens if PIR insulation gets wet?
PIR insulation is not ideal for consistently damp environments, as prolonged exposure to moisture can reduce its thermal performance and lead to potential damage. While it has some moisture resistance, it is important to ensure proper installation and protection from dampness to maintain its effectiveness.
How thick should PIR insulation be for my loft?
How thick should PIR insulation be for my loft?
When insulating your loft, PIR boards should generally be between 100 mm and 150 mm thick. You can use a single 150 mm board to achieve high thermal performance, or two 75 mm boards to reach the same level of insulation. Ensure the boards are cut to fit snugly between joists for optimal performance and energy efficiency.
Is PIR insulation better than polystyrene?
Is PIR insulation better than polystyrene?
PIR insulation is more effective at resisting heat flow and provides better thermal performance with less thickness, making it ideal for situations where space is limited and high insulation performance is needed. However, if cost is a primary concern polystyrene may be a suitable alternative. You may opt to use an extruded polystyrene if you need strong moisture resistance, which is better than standard expanded polystyrene thermally.
Which is better, Celotex or Kingspan?
Which is better, Celotex or Kingspan?
Celotex has been around for over 90 years and is known for providing reliable and budget-friendly PIR insulation. Kingspan, on the other hand, is praised for its advanced technology and excellent thermal performance. If you need a trusted and cost-effective option, Celotex is a solid choice. For top-notch insulation with the latest innovations, Kingspan might be the better.
