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.

Related products

Loading... Updating page...