October 3, 2016


Rendering Coventry



Here at R J O’Callaghan we offer specialist coloured render only systems with a warranty of 10 years.

The render we use comes pre bagged and when applied, They have a reinforcing alkaline resistant glass fibre mesh embedded into them and have a high level of crack resistance, and a durable weatherproof coating with a natural finish.

There are many different types of finishes that can be applied, with more than 600 colours available. If you do happen to find a colour elsewhere by any chance, we will try our best to get an ideal match for you.

We value delivering the very best service possible for our customers as we understand the facade is one of the key feature to any property. We invite you to experience what R J O’Callaghan External Wall Insulation and Render Systems can offer you, And see for yourself why we take a great deal of pride in our high end rendering service.

Areas we offer our rendering services include – Coventry, Nuneaton, Bedworth, Leicester, Warwickshire, London, Surrey, and surrounding areas.

Types of Render Finishes include

:Silicone Render



:Brick slips & Brick Render

What are Specialist Renders Like?

When looking at rendering your home, you will more than likely come across the term Silicone/scratch render.

While both cement-based and lime renders are traditionally mixed on site with sand, and applied in two or more coats, Silicone/Scratch come already supplied in bags/Tubs ready for mixing with water and can be applied in the traditional way with a trowel.

Implications of Damaged Render

The most common cause of cracking and bulging, however, tends to be frost action on moisture trapped between the render and the wall. This is why small hairline cracks should be sealed when they first develop, otherwise water penetrating through can freeze and expand, blowing the render surface loose — resulting in even larger cracks.

In some cases, missing lumps of render are also simply down to physical damage. Either way, once damp becomes trapped behind the surface it can penetrate through solid walls

Eroded or Damaged Brick or Stone

Signs of ageing can sometimes be a good thing, conferring what is known as ‘period charm’. On the other hand, they may be indicators of trouble ahead.

Evidence of weathering in the form of minor erosion to old brick or stone is fairly common and needn’t be a concern where it only impacts on a few localised areas. But in cases where erosion has become excessive, the damaged masonry will need to be repaired or replaced.

Signs to look out for include crumbling and spalling to the face of brick or stone, and damp penetrating the wall which can sometimes leave white salts on the surface. Walls in exposed areas like roof parapets are especially vulnerable to erosion.