About this product
weber.rend RB is the combination of 2 polymer-modified mortars, used together to create a brick-effect finish, on the weber.therm XM external wall insulation system.
Technical data
Uses
- To produce a brick-effect finish on the weber.therm XM external wall insulation system.
Constraints
Cutting out will take place after the face layer has formed a skin, and experience and climatic conditions will dictate the moment at which to commence.
Proceed methodically rather than rushing and making mistakes which will be visible and time consuming to rectify.
Do not cut too early as this will produce torn edges in the joints.
Take particular care at corners.
Keep cutting tools clean.
Ensure the surface is hard enough before removing the scrapings. If too early, there is a risk of damage to the surface.
Features and benefits
- Provides a cost-effective alternative to bricks
- Available in a choice of base and face colours
- Factory batched materials for consistency
- Supported by comprehensive technical and architectural services
- Established track record in varying climatic conditions
Colours
weber.rend RBB (base or ‘mortar joint’ render) is available in 8 colours. weber.rend RBF (face or ‘brick’ render) is available in 7 colours. Specifiers should consult the Colour Chart on page 33 of the specifiers’ handbook Weber render solutions and, whenever possible, obtain samples prior to specification.
Preparation
All surfaces must be clean, dry and free from anything that may interfere with the bond of the weber.rend RBB render.
Ensure that the weber.rend LAC has been lightly comb-scratched prior to the application of the weber.rend RBB.
Application
Base coat
Mix weber.rend RBB polymer modified mortar, by adding clean, potable water only, to achieve a workable consistency. Allow to stand 5 – 10 minutes and remix (do not add water).
Apply to the weber.rend LAC on the weber.therm XM EWI system, 7 – 8mm thick and rule to achieve a flat, in-plane surface. Take care not to over-trowel.
Face coat
Mix weber.rend RBF polymer modified mortar, by adding clean, potable water only, to achieve a workable consistency. Allow to stand 5 – 10 minutes and remix. (Do not add water)
When the weber.rend RBB has ‘taken up’, apply 2 – 3mm of weber.rend RBF render and immediately lightly texture the surface with a soft bristle brush.
Leave to take up, then set out the surface with the chosen brick pattern, taking care not to damage the face coat. Mark out the horizontal lines first.
Cut out the horizontal joints using a spirit level and the weber.rend RB cutter. Do not cut too deep.
Mark and cut out the vertical lines, again taking care not to cut too deep or damage the face coat.
After all joints have been formed, and when the surface is partially cured, (hard but not fully set), remove all traces of cut-out material by brushing with a soft bristled brush.
Good practice
Do not apply:
● If frost is forecast within 24 hours of use
● In damp/wet conditions
● In temperatures below 5°C or above 30°C
● On elevations in direct sunlight or where the substrate is hot
Packaging
weber.rend RBB is available in 3 ply, 20 kg bags with batch code and description on the side.
weber.rend RBF is available in 3 ply, 25 kg bags with batch code and description on the side.
Coverage
Use Nominal thickness Coverage
Base 7 mm 8.5 kg/m2
Face 3 mm 5.5 kg/m2
Storage and shelf life
When stored unopened in a dry place at temperatures above 5°C, shelf life is 12 months from date of manufacture.
Health and safety
Contains cement (Contains chromium (VI). May produce an allergic reaction). Harmful by inhalation. Irritating to eyes and skin. Keep out of the reach of children. In case of contact with eyes, rinse immediately with plenty of water and seek medical help. After contact with skin, wash immediately with plenty of soap and water. Wear suitable protective clothing, gloves and eye/face protection.
For further information, please request the Material Safety Data Sheet for this product.
Technical services
Weber's Customer Services Department has a team of experienced advisors available to provide on-site advice both at the specification stage and during application. Detailed specifications can be provided for specific projects or more general works. Site visits and on-site demonstrations can be arranged on request.
Technical helpline
Tel: (01525) 722110
Fax: (01525) 718988
Sales Contact
Weber products are distributed throughout the UK through selected stockists and distributors. For UK sales enquiries and overseas projects, contact Weber's Sales office.
Sales office
Tel: (01525) 722100
Fax: (01525) 718988