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Weber Saint-Gobain - Official website of the company

Technical Advice

Occasionally Weber issue technical advice notes to support our customers. Click on the link below to open the pdf document. If you need further advice please contact our Weber on 08703 330070 or email: technical(at)






Monocouche Best Practice Guide

Visible cracks in render are unsightly and although not hazardous to the construction of a building, they do reflect badly on the workmanship and overall aesthetics. Cracking can be caused by a variety of factors including excessive porosity of the substrate, shrinkage within the substrate, reflective cracking, lack of reinforcement or incorrect movement joints. By following the best practice in this guide the designer, site agent and contractor can avoid cracks to ensure a flawless façade.

For the full .pdf version please click here

Finishing weberend LAC to Receive Textured Synthetic Coatings

In the process of the installation of webertherm XM & weberend MT, we wish to highlight the importance of certain criteria that need to be adhered to as part of Best Practice in the finishing elements of the weberend LAC in advance of the application of weberplast TF150 & webersil TF150.

For the full .pdf version please click here

Weber Standard Mesh Cloth - Monocouche Renders

Weber has recently undertaken a number of performance tests of reinforcement meshes when embedded within a Monocouche Rendering. The findings demonstrate that the Weber standard mesh cloth out-performed similar Alkali Resistant Glass Fibre Meshes that are available in the UK via a number of suppliers and those of a dissimilar strength, weave, construction or composition. Therefore Weber will not endorse other mesh types being used in conjunction with weberpral.

For the full .pdf version please click here

weberend RB

There is a number of critical factors that must form part of the process when using or specifying weberend RB. The following points must be considered on any project where weberend RB has been specified as a finish.

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Lime Bloom

Where general lightening or patchiness on coloured cement products, that are otherwise sound and fully cured, seems to disappear when dampened with water, this is an indicator that the material has been affected by lime bloom.

Lime bloom does not result from a fault in the product but rather from the intolerance of cement to certain conditions during its early stage of hydration.

For the full .pdf version please click here

Maintenance of Through-coloured Render

weberpral products are a range of low maintenance cementitious through-coloured renders, information on cleaning, repairs, damage and maintenance can be found in this document.

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Hot Weather Working

Hot weather / rapid drying conditions can affect newly applied materials, causing synthetic materials to dry and cementitious materials to ‘pick up’ or stiffen much quicker than normal. Warm, dry conditions with stiff breezes can equally provide rapid drying conditions. In hot weather, application of both renders and finishes should be carried out in the shade following the sun around the building.

For the full .pdf version please click here

Winter Working

Do not work with frosted materials, on frosted substrates or apply any formless wet material in temperatures below 5°C or if low temperature can be expected during the drying and curing period.

For the full .pdf version please click here

Render Profile Beads with Scraped Finished Renders

Arises, features and stops can be formed with the use of purpose made UPVC profiles. Proprietary beads are available for detailing angles, pre sealed movement joints and both stops for vertical and horizontal bell cast details. A variety of manufacturers offer profile beads in various colours, so it is generally possible to use a bead in a sympathetic colour to the Weber render.

For the full .pdf version please click here

weberpral Site Specification

The site specification should be read entirely as it contains information on handling, desirable weather conditions, protection advice, preparation and application etc, which may have implications on labour costs and prelims, which would influence the tender price.

For the full .pdf version please click here