Lime putty based render is known to be less flexible than hydraulic lime render and has the longest time duration to cure/ dry, requiring a minimum of three months. Lime putty based render requires a long time to cure because it slowly absorbs carbon dioxide (CO2) from the atmosphere, undergoing a chemical change from calcium...Read More

Tyrolean rendering is a cement based render containing silicone which gives the render its waterproof properties. It is a finish used on masonry or concrete wall surfaces, suitable in an environment where there water is nearby and/ or high humidity e.g. coastal, suburban and rural environments. Tyrolean is usually applied using a hand operated or open-hopper spraying machine...Read More

Although rendering is used on property because of its durability and stylish appearance, it is able to sustain damage if it is subjected to sudden and great changes within the property structure e.g. if the house foundation sinks unevenly to the ground due to a faulty ground foundation. Any cracks noticed regardless of how small...Read More

The raw material for the manufacture of lime mortars and renders is obtained from naturally occurring sources such as limestone (one form of CaCO3 or calcium carbonate), sea creature shells or coral calcium carbonate/ chalk (another form of CaCO3 or calcium carbonate). For the process of making lime putty (Ca(OH)2 or calcium hydroxide) from the...Read More

When deciding to paint a new external render, it is difficult for people to decide which high quality branded paint to use on the render as there is a confusing choice of paints e.g. the Dulux weathershield smooth masonry paint or the Dulux Weathershield Waterseal. Dulux Weathershield Waterseal is a silicone based product that isn’t...Read More

Lime is known as a traditional material that has been used for many years. It is also a material that is being increasingly recommended by conservationists and architects because it does not have the potential to damage traditionally constructed buildings greatly in comparison to hard cement mortars and gypsum plasters which are well known to be  inappropriate...Read More

For a render to be highly durable, it must be bonded strongly to substrate. One of the factors affecting  bonding is the suction or absorbency of the background/ substrate i.e. the degree to which the molecules in the substrate are attracted to the render. In cases where suction is very high, walls can be lightly...Read More

It is essential the correct type of render be used to protect and enhance any particular building. Using the wrong type of render on the wrong type of wall will result in the inability of the render to adhere to the substrate, build up of damp within the substrate etc. Examples to illustrate the importance...Read More