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• Features & Benefits
• Substrate Preparation
• Application
• Limitations

Features & Benefits

• Conforms with the requirements of NHBC Render Chapter 6.11
• Premier Guarantee Warranty product approval
• LABC and LABSS registered details
• BS 5628-3 Code of Practice for the use of masonry
• BS EN 13914-1 Code of Practice for external rendering
• BS 8000 Workmanship on building sites
• Suitable for masonry and walls conforming to BS 5628-3 and constructed from the following:
  • Ultra-lightweight, lightweight & dense aggregate concrete blocks*
  • Bricks
  • Clay blocks e.g. Porotherm*
  • Standard low and normal density lightweight aircrete blocks
  • Breeze blocks (clinker)*
  • Stone/rubble stone
  • Shuttered concrete*
  • Expanded clay insulation blocks*
  • Clean, sound, well adhered existing render
  • Base coats conforming to BS EN 13914-1
  • PAREX grey weather resistant base coats, e.g. Monogris E, Parmurex or Tradirex
  • Dry-stacked inter-locking modular wall units e.g. Durisol recycled timber blocks Durisol with Monorex GM is NHBC approved for single skin external wall construction
  • For below dpc applications and old substrates in accordance with BS8000 - 4 Code of Practice for Waterproofing, consult Parex

*These substrates will require a suction control coat of Microgobetis 3000

• Unsuitable for:
  • Weak mortar or plaster (Gypsum) coated constructions
  • Exposed vertical substrates with a backward incline above 10° - a backward incline may affect water run off and may have a tendency to hold moisture
  • Painted substrates - Unless treated with Parinter
• Finishes:
  • Medium Scraped
  • Spray Textured - from tyrolean style to heavy roughcast effect
  • Smoothed Spray Textured

Substrate Preparation

• Substrates must be clean, sound, dust-free and free of any material which may prevent adhesion
• Remove all traces of plaster, paint, etc.
• Construction of the masonry must comply with BS 8000-3
• On low suction substrates e.g. shuttered concrete or high suction substrates e.g. lightweight aircrete or clay blockwork, first apply a coat of ready-to use Microgobetis 3000 or a Monorex GM keycoat made up by adding 0.5 litres of 751 Lankolatex to the mixing water volume for a 25kg bag of Monorex GM
• On wet or wet patchy substrates or where different materials have been used it is advisable to apply a key coat made up by exchanging 0.5 litres of water for 0.5L of 751 Lankolatex or Fixopierre for the mixing volume for a 25kg bag of Monorex GM. Allow the key coat to fully dry a minimum of 48 hours before the application of the next coat. This suggestion will assist against the effect of ‘block ghosting’ and shade variation
• TV10 Mesh may also be required, dependent upon substrate condition and project specification.

Application

For Weatherproofing Applications to Concrete Blocks, Clay Blocks, Lightweight Aircrete Blocks, Bricks, etc.

Spray Textured & Smooth Spray Textured

• Apply a level, compact minimum 13 - 15mm thick 1st coat
• Allow to dry and then spray the Textured finish
• The Smooth Textured appearance is obtained by pressing a plastic or stainless-steel float over the stiffened but not dry Textured finish

Scraped Finish

• Apply a level, ruled compact 18 mm thick coat, level the surface with a straight edge, spatula or trowel flat
• Allow to dry (3-16 hours) and depending on the substrate and drying conditions, scrape the surface in small circular motions using a scraping tool, removing no more than 3 mm from the surface. This scraping process must remove any slight imperfections and bring the application to the specified finished thickness
• Each elevation must be scraped at the same stage, as early scraping will result in a slightly darker shade and later scraping in a lighter shade
• The minimum finished thickness after scraping is 15 mm
• After scraping, any dust on the surface should be removed by brushing with a clean soft bristle brush
• Always stand back and examine the whole surface for blemishes and unevenness. Errors must be corrected at this stage as rectification later is not practical

For Decorating Waterproof Concrete & Masonry Substrates i.e. Covered With an Existing Sound & Weatherproof Render

Spray Textured & Smooth Spray Textured

• Apply a level, ruled, lined, compact minimum 5 mm-thick 1st coat
• Allow to dry and then spray the Textured coat
• The Smooth Textured appearance is obtained by pressing a plastic or stainless-steel float over the stiffened but not dry Textured coat

Scraped Finish

• Apply a level, ruled compact 13 mm thick coat, level the surface with a straight edge, spatula or trowel flat
• Allow to dry (3-16 hours) and depending on the substrate and drying conditions, scrape the surface in small circular motions using a scraping tool, removing no more than 3 mm from the surface

Limitations

• Product intended for professional use
• Due to shrinkage differentials, avoid applying a thin base coat and a thicker top coat application as the shrinkage values of a thicker top coat could cause the render to delaminate from the base coat. The same effect is also caused by applying a very hard render over a softer base coat
• It is advisable when completing the different finishes, to take into account the hardening time, which will vary according to climatic conditions
• Avoid applications on substrates exposed to direct sun or in hot drying winds
• Do not apply on over heated substrates. In hot condition dampen the substrate prior to application and dampen the render after application
• Do not apply to a frozen substrate or on thawing substrates. Do not use in freezing conditions.
• Take precautions during damp climatic conditions (Discolouration could occur)
• Do not apply on very wet substrates or where there are wet patches. (Discolouration could occur)
• Minimum application temperatures: +5°C for light colours, +8°C for dark colours
• Over 30°C, special precautions must be taken
• In order to reduce the risk of colour differences after drying, always use the same batch number for the same façade