Knauf Loft Roll 44 Insulation Combi Cut

Knauf Insulation Loft Roll 44 is a high-performance glass mineral wool insulation roll, ideal for use in cold lofts where pitched roofs are insulated at ceiling level. Designed to deliver excellent thermal performance, it’s a trusted solution for improving energy efficiency in homes and buildings. Made using ECOSE® Technology, Knauf’s bio-based binder, this insulation is kinder to the environment and safer to handle — with no added formaldehyde and less dust or odour. Ideal for building insulation applications, this product helps create an efficient thermal envelope. It also works seamlessly with insulation systems. It’s also completely non-combustible, carrying the highest possible Euroclass A1 fire rating, offering extra peace of mind in any residential or commercial setting.

Product Features

Knauf Loft Roll 44 is available in two formats: Combi-cut rolls, which are partially perforated for flexible installation between joists or as full-width coverage Ready-cut rolls, pre-slit to specific widths for quick placement between standard joist spacings All rolls are supplied in long lengths, making them fast and easy to install — perfect for speeding up insulation jobs. Lightweight and compression-packed, they’re also convenient to carry and store, whether you’re working on a single property or across a larger site.

Thermal and Fire Performance

Thermal conductivity: 0.044 W/m·K Fire rating: Euroclass A1 – the highest level of non-combustibility under EN 13501-1 Sustainable production: Made using recycled materials and ECOSE® binder for improved indoor air quality

Available Thicknesses & Coverage

100mm: 13.89m² per roll 150mm: 9.18m² per roll 170mm: 8.01m² per roll 200mm: 5.93m² per roll Whether you're topping up existing insulation or starting from scratch, there’s a size to suit every loft project.

Frequently Asked Questions

1. Can I install Loft Roll 44 myself, or do I need a professional?

Loft Roll 44 is designed to be DIY-friendly. Its combi-cut format makes it easy to fit between joists without extra cutting. Just remember to wear gloves and a mask for comfort and safety.

2. What makes ECOSE® Technology better than traditional insulation binders?

ECOSE® Technology uses a natural, formaldehyde-free binder made from rapidly renewable materials. It produces less dust, has a softer feel, and improves indoor air quality — all while offering strong performance and durability.

3. Is 200mm insulation enough for building regulations?

Generally, 270mm total depth is recommended to meet current **Part L** UK building regulations for loft insulation. You can achieve this by layering, for example: 100mm between joists and 170mm across joists.

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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.

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Roof Tiles & Fittings:

We recommend ordering an additional 10% of roof tiles to allow for any breakages that may occur during delivery or handling. Roof tiles are naturally fragile, and having a few extra on site helps prevent delays and ensures your roofing project can be completed without interruption.

Multiple Products from the Same Supplier

If you're ordering multiple products from the same supplier, your order will be dispatched together once all items are ready. This means the longest lead time will apply.

If you need part of your order sooner, please call us on 01202 113233. We can arrange a split delivery, although an additional shipping charge will apply.