In this blog post we discuss Render & Stucco. Read on for our tips & advice
Our guide to Render & Stucco
Traditionally, renders were applied to cover low-grade building materials such as porous brick or rubble stone as well as to protect walls from the elements...
Renders come in many finishes from roughcast, which weathers well, to smooth. Stucco (an Italian term also known as pargeting in Suffolk) is a smooth flat finish popular in Georgian and Victorian times, often where lines are trowelled out of the render to give the impression of stone. Smooth renders, particularly stucco, can look fabulous but do need to be maintained. When repairing or re-rendering, most problems come when you mix old and new materials. Traditional lime-based renders are strong and flexible, allowing the walls to breathe and condensation to escape. Cement-based render is more common today. It is rigid and non-porous, so doesn't move or ‘breathe' in the same way. On old buildings designed to allow for a little movement, this can make the render crack, allowing moisture in, which when frozen expands resulting in render falling off and the timber within to rot. More modern buildings will be constructed of these materials and so can be repaired with them with less risk. Check which products your builders are using before they start work.
There are also many synthetic renders with polymers, acrylics, aggregate reinforcements and anti-crack fibres which promise a low-maintenance, hermetically sealed finish on modern buildings. They come in a range of colours and textures.