Kingspan TR24 Thermaroof Flat Roof Board Insulation

The Kingspan TR24 Thermaroof insulation board is a premium solution designed specifically for flat roof applications. Made from rigid PIR (polyisocyanurate) insulation, it delivers impressive thermal performance with a conductivity as low as 0.024–0.027 W/mK. This makes it one of the more energy-efficient choices available for both new build and refurbishment projects. TR24 is compatible with most torch-on waterproofing systems, making it incredibly versatile across a wide range of flat roofing systems. Whether you're building from scratch or upgrading an existing flat roof, Kingspan TR24 provides excellent insulation while helping reduce energy costs over time.

Easy to Install, Built to Last

One of the key benefits of the Kingspan TR24 board is how simple it is to handle and install. It’s lightweight, easy to cut, and designed for a fast fit. Pre-bonded TR24 PB boards are also available for quicker installation—perfect for large-scale projects where time is of the essence. For added flexibility, Kingspan also offers TR24 in a tapered version to help create necessary falls in flat roofs.

Available Sizes

Kingspan TR24 comes in a variety of thicknesses to help meet different U-value requirements: 30mm – covers 7.2m² per Pack 50mm – covers 4.32m² per Pack 80mm – covers 2.8m² per Pack 100mm – covers 3.6m² per Pack 120mm – covers 2.88m² per Pack 130mm – covers 2.16m² per Pack

Key Features

Excellent thermal insulation with low conductivity (0.024–0.027 W/mK) Compatible with torch-applied waterproofing systems Lightweight and easy to handle and install Available with pre-bonded waterproofing layers (TR24 PB) for quicker installs Suitable for both new constructions and refurbishments Available in tapered versions for drainage solutions

Frequently Asked Questions

1. Can Kingspan TR24 be used with any waterproofing system?

TR24 is designed to be compatible with most **torch-applied waterproofing systems**, which makes it ideal for both commercial and residential flat roof projects.

2. Is Kingspan TR24 suitable for retrofit projects?

Yes, it’s perfect for both **new builds and refurbishments**, offering excellent thermal performance and reducing the need for additional layers.

3. What’s the difference between TR24 and TR24 PB?

The standard **TR24** board is a standalone insulation board, while **TR24 PB** comes **pre-bonded** with waterproofing material to **speed up installation** and reduce on-site labour.

Check out our full range of insulation.

Browse more insulation board available online.

At JJ Building Materials, we're committed to supplying quality building products at competitive prices, backed by the service and expertise you'd expect from an established independent merchant. Whether you're a trade professional managing large-scale projects or a homeowner taking on a DIY renovation, we're here to help you find the right products for the job.

As part of the JJ Roofing Supplies Group, we build on decades of experience supplying construction materials across the UK. We've expanded beyond roofing to offer a growing range of building materials, including timber, insulation, landscaping products, plumbing supplies, flooring, doors, bricks, fencing, garden buildings and much more – all available to order online with nationwide delivery.

We work with many of the industry's leading manufacturers to bring you trusted products that meet the highest standards of quality and performance. Our team is passionate about providing excellent customer service, competitive pricing and a straightforward shopping experience from start to finish.

When you shop with JJ Building Materials, you can expect:

• Competitive prices on leading brands and quality products.
• Nationwide delivery across the UK
  
• A constantly expanding range of building and landscaping materials.
  
• Friendly, knowledgeable customer support.
  
• A trusted business backed by the JJ Roofing Supplies Group.
  

Every order is personally reviewed by our experienced team to ensure everything is correct before dispatch. We offer delivery from as little as the next working day on selected products, so please refer to the dark blue Estimated Delivery box above for the expected delivery timeframe for this item.

We work with trusted manufacturers and specialist delivery partners to ensure your order arrives safely and on time. You'll receive tracking details once your order has been dispatched, and if we need to confirm any delivery details, one of our team will contact you directly to keep everything running smoothly.