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Flexi-Closer

Versatile cavity closer for doors and windows marked with common cavity sizes

Key Facts:
  • Closes cavity around window and door reveals
  • Fits multiple cavity widths in one product – simply cut to size
  • Prevents cold bridging
  • Integral DPC
  • Helps eliminate moisture, mould and staining from around windows and doors
  • Insulated with expanded polystyrene (EPS)
  • Single flange available for check reveal details

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Description:

The ARC Flexi-Closer is a versatile cavity closer manufactured with markings to cut the product to common cavity widths, minimising time spent installing on site. The plastic profile acts as an integral DPC, eliminating the need to instal an additional DPC.

Download Datasheet
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Key Stats
Key Stats LabelKey Stats Value
Length supplied 2.4m
Insulation Expanded polystyrene (EPS)
Thermal conductivity 0.038W/mK
Orientation Vertical or horizontal
Integral DPC Yes
Mass Data available on request

Key Benefits

Suitable for standard details

Tackles damp & mould

Excellent thermal properties

Application:

ARC Flexi-Closer closes the cavity around window and door openings in masonry walls, providing excellent thermal properties. The rigid PVCu profile acts as an integral DPC, and is insulated with expanded polystyrene (EPS). ARC Flexi-Closer is supplied complete with cutting guides to enable common cavity widths to be quickly and accurately cut. The person installing the Flexi-Closer should first familiarise themselves with the datasheet, ensuring the correct product is being fitted into the cavity.

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Get in touch today to discuss your requirements and learn more about our Flexi-Closer. Our dedicated team is ready to collaborate with you from the initial consultation through to project completion, ensuring every detail is handled with expertise and care.
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Installation instructions

The ARC Flexi-Closer is easily installed, either as the brick and block work progresses, or in to pre-formed openings. Firstly, cut the lengths of cavity closer to the required cavity width. Secondly, 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 datasheet for jointing method.

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 optional and are sold separately.

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.

» No gaps should exist either between the cavity closer and construction, or between jointed sections.

» The cavity closer must fill the cavity between brick and block, with cavity insulation cut back.

» The PVC up-stand should be fitted against the external leaf to deflect any moisture penetration through the brick.

» A plasterboard sill should be mechanically fitted over the cavity closer.

FAQ’s

Can I cut down the Flexi-Closer on site?

Yes. The product has grooves marked at common cavity widths 65mm, 75mm 85mm and 100mm. The installer simply scores a knife down the groove to trim the product to the correct size.

Do I have to install a separate DPC?

ARC Flexi-Closer includes a plastic profile which acts as an integral DPC, eliminating the need to install a separate DPC.

Is the ARC Flexi-Closer fire rated?

No, the ARC Flexi-Closer is suitable for minimising cold bridging in applications where a fire rating is not required. If you require a fire rated cavity closer, please see the ARC Eco-Closer.

How do I join two lengths of the ARC Flexi-Closer together?

Please follow the guidance on the product datasheet.

What is the ARC Flexi-Closer insulated with?

The ARC Flexi-Closer is insulated with extruded polystyrene (XPS).

Do you have further documentation for the ARC Flexi-Closer?

For any information not found on the datasheet, please contact our technical team for support. Test reports, third party certification and the material data sheet are all available on request.

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For support or more information, contact a member of our expert team. We’re available to speak with Monday to Friday, 8am – 5pm. For technical enquiries including legacy product information please call 0113 252 9428 and select option 2.

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