Rockwool Ablative Batt, ablative coated rockfibre fire protection batt Rockwool Insulation

Rockwool Ablative Batt

Fire stopping solution for concrete floors, masonry and dry wall systems, following the creation of voids for the passage of services.

Provides fire resistance up to 2 hours (50mm) and up to 4 hours (60mm).

Tested for air tightness, providing an additional smoke and acoustic seal.

Non-combustible – Euroclass A1.

Lightweight and simple to install. Easy to to repair if damamged. Requires little to no maintenace upkeep.

Made from diabase rock, which is a renewable and plentiful natural resource.

Does not contain gases that have ozone depletion potential (ODP) or global warming potential (GWP).

Thicknesses and Availability:

This Rockwool Range includes the following readily available product thickness: 50mm.

The following thickness will need to be sourced from the manufacturer and may have minimum order requirements: 60mm.

Due to supply challenges from the manufacturer, please allow extended lead times on Rockwool products. In some cases, the lead times are as long as 12 weeks. Please feel free to contact me to check availability and lead times.

Product Information

General information about Rockwool Ablative Batt

Product Application

Fire stopping to service and void penetrations

Rockwools fire protection batt, Ablative Coated Batt, is specifically designed to provide fire stopping solutions to service and void penetrations in floors and walls.

Product Make-up


Durable non-combustable stone wool spun from volcanic rock, compressed and resin bonded into slabs.


Faced on both sides with a high performance ablative coating.

Product Properties

Thickness 50mm to 60mm
Slab Length 1.2m
Slab Width 0.6m
Slab Edge Square

Product Prices

Buy Rockwool Ablative Batt

Product ex-VAT inc-VAT
Rockwool Ablative Coated Batt 50mm, 0.6x1.2m = 0.72m² £21.26 £25.51

Limited stock of the 50mm Ablative Batt is held at most of our depots. Where we need to bring stock in from the manufacturer, please allow up to 2 weeks for delivery

  • Generally 1 or 3 working days for delivery
  • Generally 1 to 5 working days for delivery
  • Generally 5 to 10 working days for delivery
  • Special request or made to order item, allow extended lead times. Minimum order levels may apply.
  • Please call to check availability and approximate lead times

Product availability depends upon stock levels at closest depot and delivery logistics to geographic locations

Product Performance and Guides

Product Performance, Manufacturer Downloads, and Installation Guides

Product Performance

Fire Performance Classification A1 BS EN 13501-1
Surface Spread of Flame Non-combustable
Nominal Density 160 kg/m³

Fire Performance

A single 50mm Ablative Coated Batt can provide up to 2 hours fire resistance integrity and insulation, ratings are dependent upon the service penetrations and void size. Where 4 hours integrity and insulation are required it is recommended to use 60mm Ablative Coated Batt.

Acoustic Performance

Tested for head of wall:

  • Rw= up to 48db (2 x Coated batts)
  • Rw= up to 37db (1 x Coated batts)

The correct use of Coated batt within concealed cavities and voids will reduce the level of transmitted sound:

  • Rw= up to 52 db (2 x Coated batts) - incorporating 48mm O/D PVC /15mm copper pipe penetrations.
  • Rw= up to 34 db (1x Coated batts) - incorporating 48mm O/D PVC /15mm copper pipe penetrations.

For specific acoustic requirements please contact ROCKWOOL Technical Solutions.

Product Certificates

Please visit the Rockwool website for product certificates.