Everything needs a change on regular intervals or else it becomes very ordinary and loses the ability to catch the person’s attention, whether it’s living or non-living. As we clean our residential or commercial property and decorate it with beautiful accessories, we must take proper attention towards the outer area also because the exterior appearance...Read More

Ashlar detailing provides an aesthetically pleasing effect within the render finish and is achieved by cutting recessed joints into the “green render” using simple tooling. The effects can be quite stunning but good execution by the applicator is paramount and Parex will offer training and advice when this is required. There are some basic rules with regard to Ashlar cutting that should be observed. These are regarded as...Read More

Lime bloom is the most common form of efflorescence ( formation of a salt crystal crust or covering through a chemical change) on cement based renders. It is caused by the migration of lime water molecules (Ca(OH)2) to the surface of the damp external render because of diffusion i.e. the surface of the damp external render contains a high...Read More

Understanding the nature of the substrate (the wall to be rendered) is critical to the success of any rendering job. The key properties of the substrate are: strength Water absorption or ‘Suction’ In general, stronger substrates will require stronger render mixes. Whilst a degree of suction is required to enable the scratchcoat to bond to the substrate, excessive suction (e.g. in aerated concrete...Read More

Hemp-lime is a natural material consisting of hemp mixed in with mortar to produce light weight insulating mortars. It has a density of between 110 and 150 kg. per m3. The strands are between 5 and 25mm long. Originally developed in France to repair historic properties to replace deteriorating wattle and daub (a Lime, mud, horse hair and...Read More

Textured wall coatings or even smooth painted areas don’t usually become infested with moss but normally either an algae or lichen. The colour and type of growth of the algae or lichen depends upon what area of the country it occurs. However, regardless of what type of micro-organism is infesting the textured wall, the treatment...Read More

The rendering system is determined by the background material, anticipated stress and aesthetics. The number of coats in the rendering varies. The simplest is just one coat, and normally the maximum is three. A basic principle in building up the rendering is that the strength of each layer is less as one moves outwards. The thickness of the rendering is determined...Read More

The original Mediterranean villas in Europe were externally rendered and painted white to help reflect heat from the Sun during the Summer season, the white pigment of the paint being due to  titanium dioxide A rendered finish is generally guaranteed to provide protection of the duration 15-20 years if properly applied while the addition of paint...Read More

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