An integral part of our fire systems, the high density, non-combustible, semi-rigid slabs offer increased fire protection in terms of insulation for any thatched roof.

Coverage – Each pack contains 12 slabs which are 1200x400x50mm each, the pack will cover an area of 5.76m²


Product Description

Beware! Thatch is one of only a few roofing materials that is combustible. Therefore, Thatchbatts® are the ideal product because they are non-combustible and will reduce the heat transfer around the roof timbers in the event of a fire!

Thatchbatts® are non-combustible, semi-rigid, high quality resin bonded mineral rock wool slabs. The Thatchbatts® have been manufactured to a width of 400mm, to allow them to be compression fitted between the roof joists. They also have a high density for increased fire protection on the underside of thatched roofs.

Thatchbatts® are normally used in conjunction with either TAS100 Thatch Fireboards or Thatch Firewall Membrane to produce a comprehensive fire barrier in terms of both integrity and Insulation. Thatchbatts® can be also used to improve thermal and acoustic values. When Thatchbatts® are used in conjunction with other components in the roof system, they can help to achieve U-Values ranging from 0.12 to 0.18 depending on the thickness selected.


  • Dimensions:
    • Length 1200mm
    • Width 400mm
    • Depth 50mm
  • Weight: 3.5kg/m²
  • High Density
  • Excellent Thermal Conductivity


  • Zero spread of flame
  • Easy to cut and install
  • Water repellent
  • Thermal & acoustic insulation
  • Lightweight
  • Reduces Heat Transfer
  • Improves insulation U-Values


Thatchbatts® have been tested in conjunction with other products in our range as part of our systems.


Since the release of Thatchbatts®, we have seen most architects selecting a minimum of 100mm of Thatchbatts® to achieve increased fire protection and thermal values.

Although Thatchbatts® offer increased fire protection where permitting, they should be used in conjunction with either Thatch Firewall or Thatch Fireboard to create a comprehensive fire barrier system.


Thatchbatts® are designed to be friction fitted between rafters set at 400mm centres.

When multiple layers of Thatchbatts® are being used, we recommend that the joints are staggered to give a more comprehensive solution.

Although the slabs, in most cases, are self-supporting, we still recommend that consideration be given to also using one of our wired support systems. These are particularly relevant if the area below the Thatchbatts® is a traditional loft space.

General Notes

  • Please review Health & Safety practices regarding dust/fibre development or confined spaces – wear a suitable disposable face mask or other suitable approved respirator.
  • All products will be supplied with Installation Instructions, which will need reviewing before completing any works.

COSHH & MSDS documents are available upon request

For more information on this and other Thatch Fire Protection Products and Systems, please contact us on 08455 20 40 60 or use our enquiry form.