Soffit Slab

Fire product

ARC Soffit Slab

  • Provides fire stopping within the soffit at the party wall junction
  • Excellent thermal and acoustic properties
  • One size fits most roof pitches and soffit dimensions
  • Manufactured from foil faced mineral wool


ARC Soffit Slab is designed to fill the void within the soffit, providing a fire, thermal and acoustic barrier between dwellings. The barrier is manufactured from rockfibre mineral wool, with a reinforced foil facing to ensure an effective smoke barrier is created. An exact fit can easily be created to form an effective barrier at this junction.

Key stats

Insulation Non-combustible rockfibre mineral wool
Thermal conductivity 0.037W/mK

Frequently asked questions about this product

Is this product fire rated?

ARC Soffit Slab is manufactured using rockfibre mineral wool which achieves a fire classification of Euroclass A1 as defined in BS EN 13501-1, and complies with building regulations for fire stopping at the pitched roof party wall detail, as well as NHBC 7.2.16.

How can I fix ARC Soffit Slab in place?

ARC Soffit Slab is held in place by its compression fit, and should be cut slightly over size to achieve this.

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