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. 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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