Eaves Insulator

Cold Bridging product

ARC Eaves Insulator

  • Ensures junction detail between wall plate and ceiling is fully insulated
  • Resolves traditional cold spot at difficult to reach triangular cavity
  • Provides ventilation opening of 10,000mm2/m
  • Available to fit 600mm rafter centres
  • Can be used in conjunction with all ventilated facia and soffit designs
  • Helps improve your SAP rating – reduces heat loss through the wall plate junction by up to 49% when compared to traditional loft insulation
  • Housebuilder Product of the Year 2019


The requirement for ARC Eaves Insulator elevated from the problem of heat loss through the roof membrane at the junction between the pitched roof and the top of the cavity wall. The nature of the shape of this part of the dwelling lends itself to difficulties in access for construction workers to provide adequate and consistent insulation to prevent heat loss. Traditional methods of filling this ‘triangular cavity’ are to apply a mineralfibre product manually over the ceiling trusses, forcing it into the narrow gap at this junction. This method of filling this ‘triangular cavity’ can be problematic for the construction worker. Calculating the amount of mineral fibre required is difficult and knowing how much compression is required to achieve an effective fill results in inconsistencies in insulation and therefore the heat loss achieved.

Key stats

Tray lengths 600mm or 900mm
Insulation Non-combustible glass mineral wool
Thermal conductivity 0.035W/mK

Frequently asked questions about this product

Is this product fire rated?

No. The ARC Eaves Insulator provides thermal insulation at the wall plate junction, and is made using a non-combustible glass mineral wool insulation.

How do I install ARC Eaves Insulator?

Please follow the guidance on the product datasheet.

Do you make ARC Eaves Insulator in different sizes?

ARC Eaves Insulator is available in a variety of sizes to suit most roof pitches. Please see the product datasheet for details or contact our sales office for technical advice.

Industry awards and accreditations for this product

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