Movement joint in situ on blockwork

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Technical trade enquiries
T  +44 (0)1299 888338
technical@renderplas.co.uk

 

    Richard Harley
    Technical Manager

Movement joints

PVCu movement joints / expansion joint beads for rendering and plastering

Our locally manufactured PVCu movement joints / expansion joint beads are designed for function and speed on all external and internal rendering and plastering applications. Discreet but strong, all beads give a perfect finish to every type of render including through colour render.
 
Application:  Designed to prevent cracking to render through thermal expansion and compression.  Must be used over a structural movement joint once settling is complete.  Can be used horizontally as a day joint to disguise a break in the application of render and provide an attractive architectural detail with a gentle shadow.  MJ4 can be folded through 90 degrees to form an internal corner on plasterboard and all profiles can be fitted in this way if a movement joint is required in an internal corner.

Colours:  Stocked in white and ivory across all PVC bead profiles except MJ4 which is supplied in white only.  Stocked in 10 further colours for MJX15.

Performance:  Renderplas plastic movement joints / expansion joint beads offer a value for money alternative to stainless steel beads because they are made from cost-effective recycled exterior grade, impact resistant, UV stable PVCu and are guaranteed not to stain or corrode like galvanized steel beads, reducing spalling and impact damage.  Designed to outlast their metal counterparts, plastic beads are guaranteed to be fit for purpose for the lifetime of the render and at least 25 years.  Our PVCu beads match the stipulations of the British and European standard for the design requirements of metal beads and lath (BS EN 13658-2:2005), are BBA certified, Class 1Y fire rated, and are not affected by weather.  The British and European Standard for the design and application of external render (BS EN 13914-1:2005) stipulates that only PVC beads and stainless steel beads can be used in all applications including situations of high atmospheric or background moisture and high atmospheric or background salt.  Beads with the code MJ4, MJ6, MJ10, MJ15 and MJ20 provide movement of +/- 2.5mm and beads with the code MJX15 provides movement of +/- 1.5mm as certified by the British Board of Agrément.

Storage, cutting and fixing:  PVCu beading is fast and easy to cut to length with tin snips or a fine toothed hacksaw and is safer to handle than cut metal.  Fixing is no different from steel beads and standard industry practice can be followed.  Please see the installation guide for details.  Store vertically away from heat and direct sun, or flat if supported along the entire length.

Packing:  All PVC beads are packed in robust fibreboard boxes.  Supplied in 2.5m lengths and in packs of 25 or 6 as shown in the table below.


Code Product
Description
Render or
Plaster
Depth
(mm)
Weight per Pack
(kg)
Lengths per Pack Colours Datasheet
MJ4 4mm Movement Joint Bead 4-6 5.33 25 White View»
MJ6 6mm Movement Joint Bead 6-8 5.88 25 White/Ivory View»
MJ10 10mm Movement Joint Bead 10-12 6.50 25 White/Ivory View»
MJ15 15mm Movement Joint Bead 14-17 7.31 25 White/Ivory View»
MJX15 15mm Wide Wing Movement Joint 15-17 5.0 6 All 12 View»
MJ20 20mm Movement Joint Bead 18-22 8.06 25 White View»