Cavity Closers

Heat loss and condensation through uninsulated door and window reveals can ruin the comfort of the home. Cavity closers would provide a thermal break at the reveal of the door and window openings and additionally would work as an effective vertical damp proof course (DPC).

If a cavity is not correctly closed around a reveal, water ingress can occur, and as a result, the seeping of damp and mould around the frame. It is important to take in to consideration the quality of the cavity closers used, and how they are installed, before the windows or doors are mounted.


Benefits

  • Prevent water penetration The use of a cavity closer will prevent the ingress of water around a window or door.
  • Prevent heat loss and cold penetration Thermal loss can result in problems of condensation, staining and mould growth at the reveals of these openings. Prolonged exposure to this will lead to a deterioration of the internal plaster and paint work.
  • Create a fire barrier A fire rated cavity closer can prevent the spread of fire.

Installation

Fitting a cavity closer during brick work
  • Make an accurate (timber) template the same size as the structural opening.
  • Cut cavity closer to the size of the sill and jamb.
  • Tack or nail the cavity closer to the window or the timber former along the sill and jamb.
  • Remove the relevant flanges on the run on so you are left only with the cavity width portion.
  • Position the window frame with 30mm overlap of cavity closer from the inside of the outer skin.
  • Position the window with the cavity closer attached onto the sill in the required position.
  • Ensure the timber window is level and upright then prop up in position.
  • Build up the two wall skins ensuring that they butt up tight to the closer.
  • Build inner skin up to the inside flange of the cavity closer and butt to the outer skin.
Fitting a cavity closers posts brick work
  • Cut cavity closer to cavity size.
  • Push fit the cavity closer into the opening ensuring that the exposed insulation points towards the internal skin.
  • Push fit the sill section in place, ensuring that the cavity closer butts up to the jambs.
  • Use galvanised or stainless steel nails to fix the flange into masonry.


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50mm Cavi-Mate EPS Cavity Closer

50mm Cavi-Mate EPS Cavity Closer

2.5m  show quantity discountsDelivery Time: 1 - 2 days

£10.85 (£13.02 inc VAT)

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Cavi-Mate EPS Cavity Closer is a new, robust window installation system ideal for the new build market. Manufactured from high quality PVC-U, it is a window former, locator and cavity closer, which enables Contractors to fit window frames quickly and easily by building around the sub-frame then fitt..

£10.85 (£13.02 inc VAT)

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other widths
100mm Kingspan Kooltherm Cavity Closer

100mm Kingspan Kooltherm Cavity Closer

100x2400mm  Delivery Time: 2 - 3 days

100mm Kingspan Kooltherm Cavity Closer is a PVCU extrusion with a rigid thermoset insulation core, which provides a simple and efficient method of closing cavities around openings in cavity walls. It is suitable for use with timber, metal or PVC window frames and can also be supplied to order in cur..

other thicknesses
26mm Reveal Clip for Kingspan Thermabate Cavity Closer 1m length

26mm Reveal Clip for Kingspan Thermabate Cavity Closer 1m length

revealclip  Delivery Time: 2 - 3 days

26mm Reveal Clip to help construction of check reveals and gives additional protection to the frame assembly.Supplied in one meter lengths. Colour coded to white. CERTIFICATIONKingspan Thermabate is manufactured to the highest standards under a management system certified to ISO 9001: 2008..

other thicknesses
50mm Kingspan Thermabate Cavity Closer 3m length (pack of 10)

50mm Kingspan Thermabate Cavity Closer 3m length (pack of 10)

50x3000mm  show quantity discountsDelivery Time: 3 - 5 days

£133.17 (£159.80 inc VAT)

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50mm Thermabate is a cavity closer box section with a fibre free, rigid thermoset urethane insulation core that maintains continuous insulation around window and door openings. It is suitable for use with timber, metal or uPVC window frames. It provides a simple and effective method for closing cavi..

£133.17 (£159.80 inc VAT)

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other thicknesses
Flange Extension Clip for Kingspan Thermabate Cavity Closer 1m length

Flange Extension Clip for Kingspan Thermabate Cavity Closer 1m length

extensionclip  Delivery Time: 2 - 3 days

Flange Extension Clip for connecting Kingspan Thermabate to extend the width of the fixing flange. It enables positive fixing of frame over suspect masonry. Supplied in one meter lengths. Colour coded to white. CERTIFICATIONKingspan Thermabate is manufactured to the highest standards ..

Jointing Clip for Kingspan Cavity Closer 1m length

Jointing Clip for Kingspan Cavity Closer 1m length

jointingclip  Delivery Time: 2 - 3 days

Jointing Clip connects two sections backtoback along their length to suit cavity widths of up to 300 mm in circumstances where a single section, Kingspan Kooltherm Thermabate Cavity Closer or Kingspan Kooltherm Cavity Closer will not suffice. It should be installed in 100 mm lengths at 300 mm centre..

Jointing Strip for Kingspan Cavity Closer 1m length

Jointing Strip for Kingspan Cavity Closer 1m length

jointingstrip  Delivery Time: 2 - 3 days

Jointing Strip that aligns and connects two abutting cavity closer sections along their crosssectional plane. It allows for opening sizes greater than 2.4 metres, and for the reduction of wastage through the use of offcuts. Limited to one butt joint per side of the opening.. Colour coded to Grey.CER..

Standard Flange Clip for Kingspan Thermabate Cavity Closer 1m length

Standard Flange Clip for Kingspan Thermabate Cavity Closer 1m length

flangeclip  Delivery Time: 2 - 3 days

Standard Flange Clip for use with Kingspan Thermabate Cavity Closers and for use as a weather check, for fixing closer sections to window frames, and for retaining partial fill insulation batts in the cavity. Supplied in one meter lengths. Colour coded to green.CERTIFICATIONKingspan Thermabate is ma..

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