- High Thermal Performance
- Easy Installation
- Custom U-Values & Lengths
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Composite Roof Panels (PIR)
Composite insulated roof sheets are single-piece insulated panels where the outer steel skin, insulation core and internal liner are permanently bonded in a controlled process. This delivers a sheet that is lightweight, thermally efficient and suitable for new build and full roof reroofing applications.
Composite panels arrive ready to fit, helping reduce labour time and ensuring consistent performance across every panel. These insulated sheets can be manufactured to specific U-values, thicknesses and lengths to suit your project.
Online Calculator
Follow our step by step calculator to get your steel roofing quote direct from Cardinal Steels
Custom Insulated Roof Panels
Use our online calculator to get a free quote for your insulated roof panels. Simply select your roof type (apex or single slope) and enter your measurements. Then you’ll be required to choose your roof profile and finish – Galvanised, Polyester, or Plastisol.
Choose your desired colour and then decide which optional extras you would like (GRP roof lights, roof flashings, fixings, and more). Follow our simple step-by-step guide to start building your quote for insulated steel roofing sheets now!
Why Choose Our Composite Panels?
- Superior Insulation: High-performance PIR foam core offers excellent U-values to meet modern building regulations.
- Load Bearing: The trapezoidal profile is engineered to support additional loads, including solar PV arrays.
- Fast Installation: Single-component construction significantly reduces on-site labour time compared to built-up systems.
- Durable Coatings: Available in a range of finishes, including Leathergrain Plastisol and HPS200 Ultra®, with guarantees of up to 40 years.
- Fire Safety: Fire-rated PIR core (Class B-s2, d0) for peace of mind and insurance compliance.
Application & Design
The JI Roof PIR is suitable for all roof pitches of 4° or more (after deflection). It is also a popular choice for vertical wall cladding in industrial units.
- Available Lengths: Standard lengths available, with custom cutting to your specific requirements.
- Acoustic Performance: Provides sound reduction (Rw) of up to 27dB.
- Flashings & Accessories: Cardinal Steels manufactures bespoke flashings in the same material and color to ensure a seamless finish. We also supply color-coded fixings, sealants, and foam fillers.
Technical Specifications
We provide a range of thicknesses to suit your project’s thermal requirements.
| Core Thickness (mm) | U-Value (W/m²K) | Weight (kg/m²) |
|---|---|---|
| 40mm | 0.46 | 10.76 |
| 60mm | 0.35 | 11.52 |
| 80mm | 0.25 | 12.28 |
| 100mm | 0.20 | 13.04 |
| 120mm | 0.16 | 13.78 |
| 150mm | 0.14 | 14.94 |
Plenty of Coatings & Colours Available
We aim to cater to a diverse array of aesthetic preferences, so you can find the right insulated steel roofing panel to compliment any existing property or new build plans.
From standard tones like whites and blacks to more vibrant hues like heritage green and terracotta, we have plenty of customisation options available.
Be advised that some colour options are only available when selecting a suitable coating for your insulated panels. Our plastisol and polyester coatings offer the widest choice for customisation. Our galvanised steel coating meanwhile comes without the availability for coloured finishes but makes up for this with it’s exceptional strength and longevity.
View our colour chart or get in contact with a member of our team to request a colour sample.