140mm Rockwool Flexi Insulation Slab

140mm Rockwool Flexi is a multi-functional stone wool insulation product engineered to deliver both thermal and acoustic performance. Distinguished by its patented flexible edge design on one side, this Rockwool Flexi slab ensures a secure friction fit between the material and structural framework. The flexible edge technology allows the insulation to accommodate timber movement as it naturally dries and contracts, maintaining consistent coverage throughout. Rated Euroclass A1 non-combustible, 140mm Flexi Slab delivers enhanced fire safety alongside superior thermal and acoustic insulation properties.

This product performs effectively across multiple building applications, including pitched roof installations, timber-framed external walls, and internal partition systems.

Product Specification

Thickness: 140mm

Width: 600mm

Length: 1200mm

Dimensions: 1200x600mm - 2.88m2

Density: 33kg/m3

Weight of 1m2: 1.65kg

Weight: 13.31kg

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

R-Value: 3.78m2K/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

140mm Rockwool Flexi represents an innovative non-combustible insulation slab solution featuring a distinctive flexible edge technology. This patented design enables rapid installation with a reliable friction fit, guaranteeing consistent performance across diverse building scenarios. The flexible edge mechanism maintains optimal contact between the product and supporting structure, facilitating straightforward installation and maximising thermal efficiency.

Rockwool Flexi 140mm demonstrates exceptional versatility across numerous building applications. From timber-framed external walls and roof rafter systems to floor assemblies and internal partitions, this insulation material performs reliably in all contexts. Its adaptability enables seamless integration throughout building structures, enhancing both thermal and acoustic performance characteristics.

With 140mm Flexi Insulation Slab, you benefit from innovative engineering and proven quality to address your insulation requirements with confidence and dependable results.

Info

Browse our complete Rockwool range and refine selections by thickness or coverage area using the left-hand filters. For guidance on product suitability for your specific project or to request a quantity discount quotation, contact us by phone on +4402038839057, email sales@insulationbee, or use our Live Chat service - Lowest UK Insulation Prices.