How to prevent render cracking

Cracked render

"How do you stop render cracking?" is a question we get asked a lot. 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. This best practice guide is split into three separate sections for ease of use.

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.

The BRE A+ Green Guide rated weberpral monocouche render is ideally suited to fulfil and exceed the principle requirements of rendering, particularly in new construction. It is manufactured from carefully selected and graded aggregates to minimise drying shrinkage of the applied render. Providing that good practice, appropriate design and suitable preparation are undertaken the render will be fully bonded and restrained by the substrate and will not crack.

There are a number of key elements in design of the construction that should be acknowledged prior to render and within the application of the product. To support our key house building partnerships we provide services to assist in achieving a successful rendered construction.

  • Advice for the building designer

    For the Designer

    To avoid the risk of cracking, it is essential that certain design considerations are taken into account. This section, aimed at the building designer, focuses on good practice in design.

    Read our best practice guide for designers →

  • Advice for the site agent

    For the Site Agent

    To avoid the risk of cracking, it is essential that certain build considerations are taken into account. This section aimed at the site agent focuses on good practice when building the substrates that are to be rendered.

    Read our best practice guide for site agents →

  • Advice for the applicator

    For the Applicator

    To avoid the risk of cracking, it is essential that certain considerations are taken into account prior to and during the application of render. This section, aimed at the monocouche applicator, focuses on good practice when preparing a substrate and applying the monocouche render.

    Read our best practice guide for applicators →

Click Compare to help you choose the right product for your project, if you need further assistance please email technical@netweber.co.uk

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