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100mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2
100mm Mannok PIR Insulation Board is an excellent choice for anyone looking for a high-performance insulation solution that provides superior thermal efficiency. It is ideal for use in any construction project, such as commercial and residential, in wall applications as well as roofing and flooring applications.
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110mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2
110mm Mannok PIR Insulation Board is an excellent choice for anyone looking for a high-performance insulation solution that provides superior thermal efficiency. It is ideal for use in any construction project, such as commercial and residential, in wall applications as well as roofing and flooring applications.
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120mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2
120mm Mannok PIR Insulation Board is an excellent choice for anyone looking for a high-performance insulation solution that provides superior thermal efficiency. It is ideal for use in any construction project, such as commercial and residential, in wall applications as well as roofing and flooring applications.
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130mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2
130mm Mannok PIR Insulation Board is an excellent choice for anyone looking for a high-performance insulation solution that provides superior thermal efficiency. It is ideal for use in any construction project, such as commercial and residential, in wall applications as well as roofing and flooring applications.
POA Get a quote -
140mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2
140mm Mannok PIR Insulation Board is an excellent choice for anyone looking for a high-performance insulation solution that provides superior thermal efficiency. It is ideal for use in any construction project, such as commercial and residential, in wall applications as well as roofing and flooring applications.
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150mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′)
150mm Mannok PIR Insulation Board is an excellent choice for anyone looking for a high-performance insulation solution that provides superior thermal efficiency. It is ideal for use in any construction project, such as commercial and residential, in wall applications as well as roofing and flooring applications.
POA Get a quote -
20mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2
20mm Mannok PIR Insulation Board is an excellent choice for anyone looking for a high-performance insulation solution that provides superior thermal efficiency. It is ideal for use in any construction project, such as commercial and residential, in wall applications as well as roofing and flooring applications.
POA Get a quote -
25mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2
25mm Mannok PIR Insulation Board is an excellent choice for anyone looking for a high-performance insulation solution that provides superior thermal efficiency. It is ideal for use in any construction project, such as commercial and residential, in wall applications as well as roofing and flooring applications.
POA Get a quote -
30mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2
30mm Mannok PIR Insulation Board is an excellent choice for anyone looking for a high-performance insulation solution that provides superior thermal efficiency. It is ideal for use in any construction project, such as commercial and residential, in wall applications as well as roofing and flooring applications.
POA Get a quote -
40mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2
40mm Mannok PIR Insulation Board is an excellent choice for anyone looking for a high-performance insulation solution that provides superior thermal efficiency. It is ideal for use in any construction project, such as commercial and residential, in wall applications as well as roofing and flooring applications.
POA Get a quote -
50mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2
50mm Mannok PIR Insulation Board is an excellent choice for anyone looking for a high-performance insulation solution that provides superior thermal efficiency. It is ideal for use in any construction project, such as commercial and residential, in wall applications as well as roofing and flooring applications.
POA Get a quote -
60mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2
60mm Mannok PIR Insulation Board is an excellent choice for anyone looking for a high-performance insulation solution that provides superior thermal efficiency. It is ideal for use in any construction project, such as commercial and residential, in wall applications as well as roofing and flooring applications.
POA Get a quote -
70mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′)
70mm Mannok PIR Insulation Board is an excellent choice for anyone looking for a high-performance insulation solution that provides superior thermal efficiency. It is ideal for use in any construction project, such as commercial and residential, in wall applications as well as roofing and flooring applications.
POA Get a quote -
75mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2
75mm Mannok PIR Insulation Board is an excellent choice for anyone looking for a high-performance insulation solution that provides superior thermal efficiency. It is ideal for use in any construction project, such as commercial and residential, in wall applications as well as roofing and flooring applications.
POA Get a quote -
80mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2
80mm Mannok PIR Insulation Board is an excellent choice for anyone looking for a high-performance insulation solution that provides superior thermal efficiency. It is ideal for use in any construction project, such as commercial and residential, in wall applications as well as roofing and flooring applications.
POA Get a quote -
90mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2
90mm Mannok PIR Insulation Board is an excellent choice for anyone looking for a high-performance insulation solution that provides superior thermal efficiency. It is ideal for use in any construction project, such as commercial and residential, in wall applications as well as roofing and flooring applications.
POA Get a quote -
125mm Mannok PIR Insulation Board 2400mm x 1200mm (8′ x 4′) 2.88m2
125mm Mannok PIR Insulation Board is an excellent choice for anyone looking for a high-performance insulation solution that provides superior thermal efficiency. It is ideal for use in any construction project, such as commercial and residential, in wall applications as well as roofing and flooring applications.
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Flat Roof Insulation Therm PIR
Flat roof insulating materials are fitted on or within roofs to control the transmission of heat through roofing materials. This insulation works on both modern and traditional flat roofing systems. It can be installed during new builds or retrofitted to upgrade thermal performance.
What is roof insulation flat roof?
These insulation products are meant for flat roofing systems only. Due to their low pitch and limited ventilation, flat roofs require insulation that carefully manages heat and moisture.
The insulating material can be added under, above, or between the roofing structure. These are known as cold, warm, or inverted flat roof systems. However, the most popular method in the UK covers warm flat roofs, where the insulation is fitted above the deck.
What is warm flat roof insulation used for?
Insulation for warm flat roofs primarily:
- Boosts the building’s energy performance.
- Maintains a warm roof deck.
- Protects the roof from temperature swings and condensation.
It can be used on many buildings with warm flat roofs, whether domestic, commercial, or refurbishment projects. It is commonly used in garages, extensions, garden rooms, offices, schools, and warehouses.
Types of warm flat roof insulation in UK
Insulation Wholesale offers an extensive range of flat roof insulation materials. All products are suitable for warm flat roof systems in line with UK Building Regulations.
Our most popular offerings include:
- PIR insulation boards: Lightweight, rigid, and highly efficient. Perfect for warm roof systems.
- EPS insulation (expanded polystyrene) boards: Cost-effective, moisture-resistant, and easy to install.
- XPS insulation (extruded polystyrene) boards: Are durable and dense. They are perfect for roofs exposed to heavy use or loads and are also commonly used in inverted roofs.
- Mineral wool insulation roof slabs: Robust, easy to cut, acoustic, and fire resistant. They are suitable for specific roofing specifications.
Benefits of using insulation for flat roofs
Depending on material choice and roof design, insulated flat roofs offer the following benefits:
- Superior thermal efficiency.
- Less condensation.
- Fire and sound protection.
- Reduced energy bills.
- Extended roof lifespan.
- An eco-friendly upgrade.
Why choose our flat roof insulation?
Here’s what makes Insulation Wholesale the trusted choice for flat roof insulation in the UK:
- Premium products from trusted UK brands.
- Quality guaranteed to meet UK regulations.
- Full range of accessories and compatible materials.
- Competitive flat roof insulation prices.
- Expert advice for both trade and DIY.
- Enjoy fast, reliable nationwide delivery within 1–3 working days, unless stated otherwise.
Are you installing a new roof or upgrading an old one? We’ll help you choose the right insulating product efficiently, affordably, and without compromise. Shop online now or contact our insulation experts for tailored advice.
FAQ
What is flat roof insulation?
This is the layer of thermal material added to a flat or low-sloped roof to improve heat retention and promote efficient energy use. This system helps meet current UK Building Regulations for energy efficiency.
Insulating a flat roof can also help sustain comfortable indoor temperatures and minimise condensation within the roof structure.
How much insulation is required for a flat roof?
The amount of insulation material depends on your desired U-value and roof design. The recommended U-value for most UK applications is 0.18 W/m²K. This typically requires between 130mm and 180mm of PIR insulation, though the thickness varies based on the material.
Always confirm thickness with a qualified installer to ensure compliance with your specific roof design and U-value target.
How much does flat roof insulation cost?
Material, thickness, and total roof area affect flat roof insulation cost. Materials like PIR and phenolic panels are more costly per sheet, but they deliver higher thermal efficiency; therefore, you may need less material overall. Check our online store or contact our team for a personalised quote for the best deal.
How thick should flat roof insulation be?
Most flat roofs in the UK need 130mm–180mm of insulating material to meet current building standards. The exact thickness depends on your chosen material and roof structure. PIR require less thickness to achieve the same level of performance as EPS/XPS or mineral wool.
