PVC Movement Joint/ Expansion Joint Beads - Movement Joint for Rendering/ Plastering
Verified by manufacturer 1 month ago
MJ4 - 4 mm movement joint bead
MJ4 - 4 mm movement joint bead
Polyvinyl chloride (PVC) movement joints/ expansion joint beads for rendering and plastering to allow mechanical and thermal movement.
Application
Designed to be applied horizontally or vertically on all standard rendering applications, external wall insulation systems, and timber framing systems. Designed to prevent cracking to render through thermal expansion and compression. Must be used over a structural movement joint once settling is complete.
For standard render, a movement joint must be used every 6 running metres, or every 25 m². For next generation renders, a movement joint must be used every 40 m².
Description
Polyvinyl chloride (PVC) movement joints/ expansion joint beads for rendering and plastering.
Features and benefits:
- Designed to provide function and speed on all external and internal rendering and plastering applications.
- Gives a good finish to every type of render, including through colour render.
- 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.
- Available in white and ivory across all PVC bead profiles (except MJ4, which is supplied in white only. Available in slate and dove for MJ10 and MJ15).
- Manufactured from recycled, exterior grade, impact resistant, UV stable PVC, providing a cost effective alternative to stainless steel beads.
- Will not to stain or corrode (like with galvanized steel beads), reducing spalling and impact damage.
- Reduced installation time.
- Not affected by severe weather conditions; the flexible plastic membrane provides a watertight seal, and can be specified in areas of high moisture or high salt.
- 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.
- Supplied in 2.5 m lengths.
- Durable; impact resistant and dissipates shock waves.
- Can be cleaned in the same way as render.
- Suitable for all habitable climates.
- The chemical bond between flexible and rigid parts prevents separation.
- Fit for purpose for the lifetime of the render; at least 25 years.
Performance/ Approvals:
- BBA certified.
- Class 1Y fire rated.
- Manufactured in accordance with the British and European Standard for the design and application of external render (BS EN 13914-1: 2016), which 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.
- Exceeds the British Standard for thermal movement BS EN 13658-2: 2005. The flexible plastic membrane gives a certified range of ± 2.5 mm. Protective tear off strip allows quick removal of render from the joint.
General information
Color | Blue Brown White Green Grey |
Finish | Matt |
Material | Polyvinyl chloride (PVC) |
Shape | Other Guidance for specification option: M-shape profile. |
Length | 2500 mm |
Width | 57 mm |
Height | 4 mm 6 mm 10 mm 15 mm 20 mm |
Warranty description | 25 year |
Uniclass | |
CAWS | M20/110 Cement:lime:sand M20/120 Cement:lime:sand roughcast (harling) M20/130 Cement:sand (air entrained) M20/140 Cement:sand (air entrained) substrates M20/160 Proprietary cement gauged render M20/200 Gypsum plaster on cement gauged undercoats M20/210 Lightweight gypsum plaster M20/220 Multicoat proprietary plaster M20/240 One coat proprietary plaster M20/250 X-ray plaster M20/280 Gypsum plaster skim coat on plasterboard M20/310 Lime:sand M20/320 Lime:sand roughcast (harling) M20/330 Proprietary lime:sand M20/650 Movement joints |
Specification data - Unplasticized polyvinyl chloride (PVC-U) external render and plaster movement joints
Colour | White. |
To suit render or plaster depth of | 4–6 mm. |
Fixings | Embed in a continuous line of render. Mechanical fixings can be used temporarily if required until the beads are set. |
Chemical resistance | Manufacturer's standard. Manufacturer guidance
|
Fire performance | Class 1Y. Combustible within fire source, self-extinguishing upon removal of flame, will not contribute to the combustion of the system. |
Mechanical joints | +/- 2.5 mm. |
NominalSize | 4 mm. |
Curve radius | 1 m. |
Sustainability data
Contains Red List materials | No |
Country of material origin | United Kingdom Guidance for specification option: And Europe. |
Country of product manufacture | United Kingdom |
Embodied carbonA1-A3 (production stage) as defined in BS EN 15804 | 0.01 kg CO₂ eq/kg |
Recyclability | 100% |
Recycled contentAs defined in clause 7.8 of BS EN ISO 14021 | 90 % Guidance for specification option: 90% for the largest profile to 60% for the smallest profile. |