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Rockwool 100mm Flexi Slab Acoustic Insulation (1200mm x 600mm) 4.32m² (6 per Pack)

In Stock

SKU : YBM1218

ROCKWOOL Flexi® is a high-performance stone wool insulation slab designed for acoustic, thermal and fire-resistant applications in framed building elements. Its unique Flexi-Edge allows each slab to compress and friction-fit accurately between studs or joists, ensuring minimal air gaps and consistent long-term performance. Each slab measures 1200mm × 600mm × 100mm, with 4.32 m² coverage per pack (6 slabs).

Lead Time: 3-5 Days

Manufacturer Model No:
Flexi
Thickness:

From:
£40.11 Ex VAT
£48.13 Inc VAT

Description

Key Features & Benefits

  • Flexi-Edge Technology: Compressible edge provides a secure friction-fit between studs/joists.
  • Thermal Conductivity: 0.038 W/m·K.
  • Acoustic Absorption: Optimised fibre structure reduces sound transmission and dampens vibration.
  • Euroclass A1 Non-Combustible: Maximum fire-safety rating under EN 13501-1.
  • Dimensional Stability:  Retains shape and thickness for the building’s lifetime; will not slump.
  • Water Repellent:  Stone wool fibres resist moisture while remaining vapour-permeable.
  • Environmentally Produced: Made under ISO 14001 & ISO 9001; contains no harmful blowing agents.

 

Applications / Typical Uses

  • Internal partitions (timber or metal stud).
  • Separating / party walls compliant with acoustic requirements.
  • Intermediate, suspended and separating floors.
  • Pitched roofs and rafter-level insulation.
  • Timber or steel external framed wall systems.
  • New builds, refurbishments, and upgrade works.

 

Installation & Handling

  • Select slab size to suit standard centres (e.g., 600 mm or 400 mm).
  • Insert slabs with Flexi-Edge against the stud to create a friction-fit.
  • Install only onto dry, structurally sound substrates.
  • Cut with long-blade knife if needed; avoid compressing slabs as this reduces performance.
  • Use PPE: gloves, eye protection, and mask in low-ventilated areas.
  • Follow ROCKWOOL’s installation guidance to achieve declared thermal, acoustic & fire performance.

 

Compliance & Certification

  • EN 13162:2012 + A1:2015 – Mineral wool insulation for buildings.
  • Reaction to Fire: Euroclass A1 (EN 13501-1).
  • Manufacturing Standards: ISO 9001 Quality Management & ISO 14001 Environmental Management.
  • Suitable for use in systems requiring fire-resistant, non-combustible insulation.
  • Product documentation including DoP and SDS available from ROCKWOOL.

Additional information

Amount

Total pack coverage

Single Product Coverage

Thickness

Width

Length

Application

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Manufacturer Model No

Manufacturer's Technical Documents

Data Sheet

View
Safety Guide

View

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Payment

The average delivery lead time for the majority of orders is 3-5 working days from the date of your order, however, it could extend to 7-10 working days on rare occasions. Once the order has been placed, a member of staff will then be in contact to confirm a delivery date.

The following delivery fees apply to Grey delivery area.

  • Minimum order value: £200 ex VAT
  • Orders between £200 and £600 ex VAT£55ex VAT
  • Orders over £600 ex VAT: Free delivery

 

Delivery lead times for orders outside our standard delivery may take between 7-10  working days. If you are outside our standard grey delivery area, please click on the “Save & Share Basket” button at the cart stage, select the email option and send it to sales@theyardbm.co.uk or call us on 07902 952 591. We will get back with a delivery quote to you shortly.