cavity closers

Insulated Cavity Closers

cavity closersHEAT LOSS AND COLD PENETRATION

The problems of cold bridging are recognised in the Part L Building Regulation 2010 and Scottish Building Regulations 2004. Dacatie Insulated Cavity Closers are used to overcome thermal loss that occurs around unprotected cavities and reveals. Thermal loss can result in problems of condensation, staining and mould growth at the reveals of these openings. Prolonged exposure to such factors will lead to a deterioration of the internal plaster and paint work. The use of Dacatie Cavity Closers will help to prevent the occurrence of such factors.

PREVENT MOISTURE PENETRATION

The use of a Dacatie Cavity Closer or frame former will prevent the ingress of water around a window or door. To achieve this it is important to specify a frame setback position of 30mm with a recognised sealant around the frame.

CREATE A FIRE BARRIER

Where a fire barrier is required, a Dacatie Fire Rated Cavity Closer (Pages 9-12) should be used. The closers have fire integrity ratings from 30 minutes to an hour.

COMPLY WITH PART L OF THE BUILDING REGULATIONS

Building Regulation (Part L) compliance is important. The path of minimum thermal resistance through the closer must be at least 0.45 m2K/W, which Dacatie Closers achieve.

For Frame Formers, the following information should be supplied:
1. Overall width (a - opening) mm
2. Overall height (b - opening) mm
3. Cavity width mm
4. Three or four sided former 3/4
5. Plaster stop required? yes/no
6. Check reveal yes/no

It is the responsibility of the contractor to ensure frames are supplied as ordered before installation, as no responsibility for any incorrect dimensions can be considered after the frame former has been built into the brickwork. Note: when ordering for timber frame constructions, please contact our technical department.

 
APPLICATION/FIXING DETAILS

The Dacatie frame Former is suitable for use with all window and door frames, including timber, PVCu and aluminium. For easy installation follow these steps. Step 1 Build wall up to sill height and locate the Dacatie Frame Former in the cavity (check former is square and propped up vertically). Step 2 Build up courses of brick /blockwork inserting brick ties alternately between the brick and the block every 225mm (every three bricks orevery course of block work). Step 3 Brick up to lintel height and remove bracing (if applicable). Step 4 Build in lintel and upper brickwork.

NOTES FOR WINDOW AND DOOR INSTALLATION

Check window or door is within tolerances; windows should be 10mm less than inside width of former and 8mm less than the inside height of former. Fix with standard window fixings (e.g. lugs, reveal straps or bolt fixings).

WEATHER RATING

Flush: Severe (with 30mm set back) Check Reveal: Very Severe

USAGE

A fully insulated cavity closer made up into sturdy factory built frame former eliminating the need for site fabricated timber templates around window and door reveals.

FIXING METHODS

Frame formers can be manufactured with welded corners or using corner brackets - both available through Dacatie. Contact us for further details.

  • Saves time on site
  • Part L 2010 compliant
  • Accepts all window and door materials
  • Insulation is zero rated for ozone depletion potential (ODP)
  • Available in two profiles FF4000 and FF5000 (for internal fixing)
  • Cavity Widths: FF4000: 75 – 110mm, FF5000: 110 – 160mm
  • D2000 also available as a 50 - 100mm fire rated frame former


cavity closers

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