Knauf Earthwool 100mm Loft Roll 40 Combi Cut

100mm Knauf Earthwool Insulation Loft Roll 40 is a Glass Mineral Wool roll engineered for unheated lofts where sloped roofs need insulation installed at ceiling height. This 100mm loft insulation provides excellent thermal performance across its range.

Boasting non-combustible properties, 100mm Knauf Loft Roll 40 achieves the top Euroclass A1 fire reaction rating. The product is manufactured using Knauf Insulation proprietary bio-based binder, ECOSE® Technology.

Product specification

Brand: Knauf®

Model: 100mm Knauf Loft Roll 40

Thickness: 100mm

Length: 11250mm

Width: 1140mm (2x570 3x380)

Dimensions: 11,250mm x 1,140mm x 100mm

Pack Coverage: 12.83m2

Material: Glass Mineral Wool

Profile: Combi-Cut | 2x570mm | 3x380mm

Facing: Unfaced

R-Value: 2.5m2K/W

Thermal Conductivity: 0.040 W/mK

Fire Classification: Euroclass A1

Vapour Resistivity: 5.00MNs/g.m

Applications: Pitched roof at ceiling level

ECOSE Technology: Yes

Features: Quick and simple installation

Manufacturer: Knauf Insulation Earthwool®

100mm Knauf Loft insulation Roll 40 is available in the following formats:

• Combi-cut rolls
• Ready-cut rolls
• Uncut rolls
• Short length, combi-cut rolls

ADVANTAGES

1. Simple to manage and move around building sites thanks to compression packaging and reduced weight.
2. Combi-cut variants feature partial perforation, giving you the option to fit between joists or use as a full-width roll, boosting installation speed.
3. Ready-cut variants arrive pre-sized, streamlining on-site work.
4. Uncut variants provide adaptability for custom fitting, whether between joists or as complete-width rolls for faster setup.
5. Supplied in longer lengths to speed up installation and reduce labour time, maximising efficiency on-site (applies to Combi-cut, ready-cut, and uncut rolls).
6. Available in shorter lengths to deliver a budget-friendly choice in smaller quantities, particularly for short-length Combi-cut rolls.

Application

100mm Loft Rolls provide thermal insulation for cold pitched roofs at ceiling height. Installation typically involves two layers: the first layer sits between the joists, and the second layer runs over and perpendicular to the joists.

Sizes:

Management, Cutting, and Storage Guidelines:

• Handling 100mm Knauf Loft Roll 40 is straightforward, given their light weight and simple installation process. They can be readily trimmed to your required dimensions.
• The 100mm Loft Insulation Rolls come wrapped in recyclable polythene packaging (4-LDPE), offering short-term safeguarding.
• For longer-term on-site protection, store the product indoors or under shelter, positioned above ground level.
• Avoid leaving Loft Rolls exposed to the elements for extended periods.

About

Our 100mm Glass Mineral Wool insulation products contain up to 80% recycled material. By maximising the use of recycled glass in manufacturing, we minimise the need for fresh raw materials.

Thermal

The 100mm insulation's energy-saving performance and thermal efficiency help keep buildings warm during winter and cool in summer. When indoor and outdoor temperatures differ significantly, buildings lose heat quickly in winter and gain it rapidly in summer. Our 100mm Knauf mineral wool insulation solutions maintain steady interior temperatures by reducing heat movement via convection, conduction, and radiation. Proper insulation of your property delivers substantial energy savings, either by reducing heating system demands in cold weather or lowering cooling system usage in warm weather.

Fire Safety

The 100mm loft insulation fire performance provides passive fire protection capabilities. Buildings must be designed and constructed to minimise fire risk, limit spread, maintain structural integrity, and enable safe evacuation if needed. Beyond acting as a fire barrier, our non-combustible mineral wool insulation solutions don't fuel fire progression, thereby reducing its severity and impact.

Acoustic

Insulation's acoustic properties significantly improve the indoor environment for building occupants. Noise control is essential for enhancing "quality of life" in homes and creating healthy, productive, and comfortable spaces in offices, hospitals, schools, and commercial buildings. Our 100mm Knauf mineral wool insulation roll products deliver strong sound absorption and noise reduction performance, whether in new builds or retrofitted to existing structures. This enhances sound insulation and acoustic comfort.

Info

Browse our Knauf Insulation range and use the left-hand filters to narrow by thickness or coverage. To discuss product suitability for your project or request a quantity discount, contact us on +4402038839057, email sales@insulationbee, or use Live Chat - Competitive UK Knauf Loft Insulation Pricing.