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Cavity Width: 50mm Cavity - 2.4m Length (Pack 8)
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£104.14 inc VAT

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The ARC Eco-Closer is designed to close off the cavity around window and door reveals without the need for a return block and where a fire rating of up to one hour is required. It prevents cold bridging and eliminates moisture, mould and staining from around windows and doors

This is for the Eco-Closer and Eco-Closer Plus products.

  • 1 Hour fire-rated
  • Closes cavity around window and door reveals
  • Prevents cold bridging
  • Integral DPC helps eliminate moisture, mould and staining from around windows and doors
  • Insulated with non-combustible rockfibre mineral wool
  • For cavity widths from 50mm to 300mm
  • Single flange available for check reveal details
  • Supplied in 2.4m lengths
  • Third-party certificated by Certifire

The 2.4m lengths are manufactured from a rigid PVCu profile that is insulated with non-combustible rockfibre mineral wool which provides fire, thermal and acoustic properties as well as being ODP and GWP zero rated.

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


Length supplied 2.4m
Third-party certification Certifire CF5410
Insulation Non-combustible rockfibre mineral wool
Thermal conductivity 0.035W/mK
Fire rating Up to 60 minutes
Insulation performance 15 minutes
Test standard BS 476 Part 20
Construction type Masonry
Orientation Vertical or horizontal
Integral DPC Yes

    The ARC Eco-Closer is easily installed. Simply cut the jamb profile
    to the height of the window or door opening plus 75mm to allow the
    bottom edges to drop into the cavity below the sill. 

    Once the jamb sections are installed, measure the required width for the sill section and cut a length to butt tightly to the jamb sections. If a longer length than 2.4m is required, see below

    Option 1 (First Fix): As above and build in the jamb sections as the
    brickwork progresses using ARC Brick Ties* (1 every 225mm). Ties are
    not required on the sill section, simply hold in place with an adhesive
    or nail to block. *ARC Brick Ties are sold separately and can be purchased by clicking this link

    Option 2 (Second Fix): Cut sections to required size as above and
    simply push fit once the openings are formed. Sections can be
    secured by nailing to block or using a suitable adhesive.

    Jointing Method:

    Where a longer length than the supplied 2.4m is required, the following jointing
    method should be used. 

    Using an appropriate saw, remove 150mm of the
    plastic profile only, then push the exposed insulation into the next length of plastic

    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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