K-Rend or Sand and Cement

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If you are thinking of improving the look or the weatherproofing of your property, there are several options available to you these days. You could use cladding; tiles, timber or plastic but, as a plasterer, the option I can offer is to render the property. The two options I can currently offer are; traditional sand and cement render or the new technology of silicone based, colour renders such as K-Rend.

What’s the difference?
Sand and Cement

The traditional sand and cement render is generally the cheaper option and offers a hardwearing, cost-effective protective shell to a building that is relatively quick to apply to the walls. However, the finish will be a brown colour and is not waterproof.

As part of the waterproofing process, the building will need painting using a suitable exterior paint on a regular basis. This consideration needs to be factored in to the decision making process when comparing options.







The alternative, and more expensive option, is a silicone based render such as K-Rend.

This is a modern version of the sand and cement render where polymers have been added to improve water resistance but also it allows the building to ‘breathe’ by letting moisture escape.

These modern renders are available in a wide range of colours which means that, unlike the sand and cement finish, once it is applied, it requires no further maintenance.  Follow this link for a selection of colours available from K-Rend; K-Rend Colour Options

How is it done?

There will be a requirement for scaffolding to be erected in order to apply either of these options so, unless the building is a bungalow, this is an additional cost factor.

The application time and method for both options is similar; SBR (a waterproofing agent) is usually applied to the bricks/blocks to ensure the base coat adheres properly. A mesh is then used in conjunction with a base (scratch) coat to prevent the top or finish coat from cracking. Windows and doors will need ‘plastic beads’ applied so the finished project has clean, sharp corners and the use of plastic means there is no chance of them rusting and spoiling the finish. If there is a particularly large area of wall there could be a requirement for an expansion joint to be used. This is to ensure that there is no cracking caused by any movement in the wall.

Want to discuss it further?

Paddy the Plasterer is happy to discuss any questions about either of these options so feel free to contact him at any time! Click here