100mm Rockwool Flexi Insulation Slab 1200x600mm

100mm Rockwool Flexi is a stone wool insulation product engineered to deliver both thermal and acoustic performance. Its defining characteristic is a patented flexible edge on one side, which enables superior fitting precision.

The Rockwool Flexi slab features a flexible edge designed to create a friction fit between the insulation and structural framing. Installation is straightforward—the material fits easily between fresh timber and expands as the timber dries and shrinks, maintaining continuous coverage. Classified as Euroclass A1 non-combustible, this insulation delivers enhanced acoustic insulation and thermal protection.

Suitable for multiple building applications, including pitched roof installations, timber-framed external walls, and internal partitions.

Product Specification

Thickness: 100mm

Width: 600mm

Length: 1200mm

Dimensions: 1200x600mm - 4.32m2

Density: 33kg/m3

Weight of 1m2: 1.65kg

Weight: 14.26kg

Thermal Conductivity: 50-120mm 0.038 W/mK / 140mm> 0.035 W/mK

R-Value: 2.63m2K/W

Product Standards: BS EN 13162

Reaction to fire (Euroclass): Euroclass A1

Acoustic: Achieves Part E (resistance to sound) when installed in accordance to ROCKWOOL guidelines

Water vapour resistance: 5.2 MNs/gm

Water repellent: Yes

FEATURES AND BENEFITS:

• Excellent thermal performance. • Effective noise absorption. • Euroclass A1 non-combustible. • FLEXI Edge ensures tight friction fit. • Remains securely in place when timber studs dry out and contract. • Mineral wool insulation batts (slabs) CE marked to BS EN 13162:2012+A1:2015

Applications

1. Intermediate Floor Insulation
2. Separating Floor
3. Rafter Line
4. Separating Wall
5. Partition Wall
6. Pitched Roof
7. Timber Frame
8. Floor Solutions

About

This 100mm Rockwool Flexi non-combustible insulation slab combines multi-purpose functionality with innovative flexible edge technology. The patented design delivers a quick, effortless friction fit for flawless installation. The flexible edge maintains a perfect seal between the product and its supporting framework, ensuring straightforward installation and optimal performance.

Rockwool Flexi 100mm adapts to numerous building scenarios. From timber-framed external walls and roof rafters to floor cavities and partition systems, this insulation performs reliably across all applications. Its flexibility enables seamless integration throughout building structures, enhancing both thermal and acoustic characteristics.

With 100mm Flexi Insulation Slab, you gain a dependable solution combining innovative design with proven performance for your insulation requirements.

Info

Browse our Rockwool range and refine by thickness or coverage using the left-hand filters. For project-specific guidance or bulk pricing enquiries, contact us by phone on +4402038839057, email sales@insulationbee, or use Live Chat - Lowest UK Insulation Prices.