30 DAY


Size: 50mm Cavity - 50 x 260 (340 DPC) x 1200mm (pack 12)
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£126.43 inc VAT

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The ARC Party Wall DPC is designed to enable the closing of an external cavity both vertically at the junction with a party wall and horizontally at separating floor levels, where building regulations require the use of a mineral wool closer for acoustic insulation purposes.

  • Up to four hours fire integrity
  • Specified in semi-detached, apartments and major projects
  • Meets requirements of Robust Detail Part E and Building Regulations Part B
  • Vertical, horizontal or staggered variants available
  • Integral DPC
  • Maximum cavity width available: 300mm
  • Easily installed with a friction fit
  • Third-party certificated by Certifire

Manufactured from non-combustible rockfibre mineral wool insulation and sleeved in colour coded polythene for onsite identification and protection. The ARC Party Wall DPC includes an integral DPC, satisfying any requirement for a DPC to be installed between the barrier and external brickwork.

This product is sold in pack quantities, the pack sizes are on the product dropdown for easy selection.


Length supplied 1.2m
Third-party certification Certifire CF5403
Insulation Non-combustible rockfibre mineral wool
Thermal conductivity 0.037W/mK
Fire rating Up to 4 hours
Insulation performance Minimum 3 hours
Test standard BS 476 Part 20
Construction type Masonry
Orientation Vertical or horizontal
Integral DPC Yes

    Please click on the links below:

    ARC Party Wall DPC Datasheet

    ARC Party Wall DPC is designed to be installed as the brick and blockwork progresses, requiring only a friction fit within the cavity. No mechanical fixing is necessary.
    Vertical Installations:
    The internal blockwork should be completed first. The ARC Party Wall DPC is then installed against this, with the brickwork being laid tight against the DPC, ensuring the barrier is tightly fitted with no gaps. The barrier should be oriented so that the 100mm lap of DPC is at the bottom of each length, this lap should run in front of the length below.

    ARC’s wealth of technical experience ensures that the best solution can be identified from their comprehensive range of products. All fire barriers and cavity closers are manufactured to NHBC requirements and hold LABC accreditation. Operating within an ISO 9001 Quality Management System and ISO 14001 Environmental Management System, all products are manufactured to the highest standards.

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