Key Features

  • Closes off cavities around window and door reveals
  • Available in cavity widths 50 to  300mm
  • Supplied in 2.4m lengths
  • Prevents cold bridging
  • Available single flange for check reveal details
  • Insulated with ODP and GWP zero rated extruded polystyrene

The ARC Contract-Closer is designed to close off the cavity around window and door reveals without the need for a return block, preventing cold bridging and eliminating moisture, mould and staining from around windows and doors. The 2.4m lengths are manufactured from a rigid PVCu profile that is insulated with extruded polystyrene. The ARC Contract-Closer is manufactured to the specific cavity size required and can be made to suit cavities from 50mm up to 300mm.
The ARC Contract-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 jointing method on the next page.
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.
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.

Fire Properties
ARC’s extruded polystyrene insulation is classified as Euroclass F. When installed as a cavity closer and when protected by plasterboard and screed, a Euroclass B classification can be achieved.
Thermal Properties: Cold Bridging
Cold bridges are sections through the fabric of significantly lower thermal resistance than the rest of the construction. It is most commonly found around window and door openings and usually shows itself through so called pattern staining. A cold bridge through an external frame attracts moisture in the form of surface condensation which attracts dirt and dust. This surface condesation can also lead to mould growth and damage to internal plaster and paint work.

Please click here to view Datasheet > Contract-Closer v2 <

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