Thermal Cavity Closers

G243-G244

The G243 and G244 Flexible Cavity Closers sections allow for arched and round windows and doors to be easily incorporated into building designs without compromising insulation requirements.

  • Description & Key Features

    Product Description

    The G243 and G244 Flexible Cavity Closers sections allow for arched and round windows and doors to be easily incorporated into building designs without compromising insulation requirements.

    Manthorpe flexible cavity closer is available in two alternative profiles the G243 Cavity Closer suits standard cavities while the G244 is suitable for rebated details. Both are suitable for closing the cavity at circular or arched openings with a minimum diameter of 500mm.

    Any size opening can be produced, from domestic ‘bull’s eye’ windows to large commercial applications, through its unique joining system and flexible capability.

    It meets all current building regulations and achieves the required U value at the reveal of door and window openings when the frames are fixed to allow a 15mm overlap into the cavity. It is recommended that a suitable cavity tray should be fitted above the window to shed water away from the closer, frame and inner leaf.

    The cavity closer is non-load bearing and should not be used as replacement for traditional methods of fixing window and door frames to the masonry.

    Key Features

    • Suit arched and round window and door reveals
    • Single and double flange versions for standard and rebated details
    • Insulation providing GWP rating of less than 5
    • Available in varying cavity widths
  • Technical

    Fitting Requirements

    Bend around a dummy former to cut to size, oversail arched closers by 150mm down into the vertical jambs.

    Use a G245 Fixing Clip to join to a straight length of closer if needed.

    Brick up to the base of the opeing in the normal manner, fit the closer and tie into the masonry as the wall is built around the opening.

    Certifications

    Manthorpe Thermal Cavity Closers - BBA Certificate - 96-3226.pdf

    Regulations & Standards

    BS 5250:2011 Control of condensation in buildings.

    Approved Document L1 & L2:
    Conservation of fuel and power.

    NHBC Technical Guidance 6.7:
    Doors, Windows & Glazing

    BRE Digest Report 262: Thermal Insulation: Avoiding Risks.

    BRE Information Paper IP 1/06: Thermal Bridging at Junctions & Openings

  • Specifications

    Size Information

    Length 2.5m

    Cavity width from 50mm to 150mm

    Wider cavity sizes are available to order as specials up to 350mm.

    For circular or arched openings with a minimum 500mm diameter

    Material

    Extrusion: UPVC

    Styrofoam: CFC free
    extruded
    polystyrene

    Colour

    Extrusion: White

    Styrofoam: Blue

    Quantity Information

    Length per pack: to order

To keep up to date with new product launches, sign up to our newsletter today