50mm Rockwool Flexi Insulation Slab 1200x400mm

50mm Rockwool Flexi represents a high-performance stone wool insulation solution delivering both thermal and acoustic properties. The product features a distinctive flexible edge on one side for enhanced installation performance.

The 50mm Rockwool Flexi slab incorporates patented flexible edge technology, guaranteeing a precise fit against structural frameworks. Installation proves straightforward, with the insulation positioned easily between fresh timber. As timber naturally shrinks during the drying process, the 50mm Flexi Slab expands to fill gaps. This product achieves Euroclass A1 non-combustible status, delivering superior acoustic insulation and thermal performance.

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

Product Specification

Thickness: 50mm

Width: 400mm

Length: 1200mm

Dimensions: 1200x400mm - 5.76m2

Density: 33kg/m3

Weight of 1m2: 1.65kg

Weight: 9.5kg

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

R-Value: 1.32m2K/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

50mm Rockwool Flexi represents a premium non-combustible multi-use insulation slab featuring an innovative flexible edge design. Engineered with proprietary technology, it provides rapid, effortless friction-fit installation with guaranteed precision. The flexible edge maintains optimal contact between the product and supporting structure, enabling straightforward installation and reliable performance.

The adaptability of Rockwool Flexi 50mm extends across numerous building scenarios. From timber-framed external walls and roof rafters to floor systems and partition walls, this insulation slab performs consistently. Its flexibility permits integration throughout building envelopes, enhancing both thermal and acoustic characteristics.

Info

Browse our Rockwool range and refine by thickness or coverage using the left-side filters. For project-specific product guidance or bulk quotations, contact us on +4402038839057, email sales@insulationbee or use Live Chat - Competitive UK Insulation Pricing.