Rockwool Ablative batt Rockwool Insulation

Rockwool Ablative Coated 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 manufacturers, please allow extended lead times on Rockwool products. Please feel free to contact me to check availability and lead times.

Product Information

General information about Rockwool Ablative Coated 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

Nominal Density 160 kg/m³
Fire Performance Classification A1 BS EN 13501-1
Surface Spread of Flame Non-combustable
Slab Length 1.2m
Slab Width 0.6m
Board Edge Square

Product Prices

Buy Rockwool Ablative Coated Batt

The prices and quantity discounts below are 'per slab' rates. Each slab is 0.6x1.2m = 0.72m².

Availability Undetermined - Special circumstances are involved in the supply of these products. Rockwool Ablative Coated Batt 50mm, 0.6x1.2m = 0.72m² - ranging from £20.94 to £21.92 per m²

1 plus slabs @ £21.92 per m² = £15.78 (£18.94 inc-VAT) per slab
4 plus slabs @ £21.72 per m² = £15.64 (£18.77 inc-VAT) per slab
8 plus slabs @ £21.53 per m² = £15.50 (£18.60 inc-VAT) per slab
12 plus slabs @ £21.33 per m² = £15.36 (£18.43 inc-VAT) per slab
16 plus slabs @ £21.14 per m² = £15.22 (£18.26 inc-VAT) per slab
20 plus slabs @ £20.94 per m² = £15.08 (£18.10 inc-VAT) per slab

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

Please observe the 'Star Rating' indicators to assess availability.
Product Availability Excellent Generally 1 or 2 days for delivery
Product Availability Good Generally 1 to 5 days for delivery
Product Availability Fair Generally 5 to 10 days for delivery
Product Availability Poor Generally 5 to 15 days for delivery
Product Availability Undetermined 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 Certification, Downloads, and Installation Guides

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.

Installing Rockwool Ablative Batts

  • Make sure that the area within the aperture is clean of any debris and remove any dust from the edges.
  • Cut Rockwool Ablative Coated Batt to the size and shape required to fit the aperture ensuring that the batt will make a tight fit with all edges of the aperture.
  • Mark the batt to note placement of services for ease of cutting.
  • Cut rectangular/circular/semi circular holes from the coated batt to accommodate services such as cable trays/ladders containing cables, and pipe work services.
  • Cut the Coated batt across its width at the mid-point of each hole to enable the batt to be fitted into the aperture.
  • Apply Rockwool Acoustic Intumescent Sealant to all edges of the batt ensuring that an even cover is achieved over the entire thickness of the batt. This should include the outer edges of the batt and the edges of the cuts made across the batt to allow fitting into the aperture. There is no requirement to apply sealant to the edges of the holes cut to accommodate cable trays or ladders.
  • Insert the batt into the aperture.
  • Repeat the following steps on boths sides of the batt.
  • Apply a bead of Rockwool Acoustic Intumescent Sealant approximately 15mm wide around the perimeter of the batt ensuring that all gaps between the batt and surrounding edges are fully filled.
  • Apply a bead of Rockwool Acoustic Intumescent Sealant around all penetration/batt interfaces to ensure a complete seal.
  • Check fit around services once batt is in place. Gaps larger than 15mm should be infilled using offcuts of batt and Ablative Coating applied to cover any bare mineral wool.
  • Apply a bead of Rockwool Acoustic Intumescent Sealant approximately 15mm wide where cables pass through the batt. Ensure that the sealant fully encloses each cable within the tray or ladder and that all gaps are fully filled.
  • Paint any visible areas of stone mineral wool with Ablative Coating.
  • Note: For any areas of batt where the coating has been damaged, repaint with the Ablative Coating. Ensure that there is no uncoated slab or bare mineral wool visible.
  • Rockwool Ablative Coated Batts are not intended for use as load-bearing seals. All service items should be adequately supported either side of the seal to ensure that no load is transferred onto the Ablative Coated Batt.
    Minimum order level - £175.00 ex-VAT. For further details on Delivery Charges and Minimum Order levels, please Click Here