Rendering is the protective covering that shields the exterior exposed walls of a house or property from the elements. Think of it as the equivalent to a thick waterproof jacket that keeps the rain out and acts as a barrier to the cold.
The outer layer of your house, if built of brick, is pretty porous. Without intact rendering, the property will quickly absorb moisture from the rain and air, allowing the dreaded damp to penetrate and cause all kinds of expensive problems. Prevention is most definitely better than a cure when it comes to rendering.
Many homes with single skin (usually 225mm/9”) brick construction are suitable for rendering, whilst considering this, it is a good time to consider your insulation. This can be inside, though this will take valuable space. Outside insulation would be affixed to the wall, a mesh placed on top, with a final render layer. Note modern day render materials can be found in colours to save the cost of decorating. If your home is cavity insulated already, then you only need to focus on the external render.
Traditional rendering, using a layer of either cement or lime on top of a scratch coat(layer of mortar or plaster applied to a wall surface before the final finish), has a life expectancy of around 30 years. But modern formulas such as acrylic or resin-based renders can be good for up to 40 years, plus they are less prone to cracking and they usually hold a higher insulation rating than their older counterparts. So, not only will you save money in the long run, but you will also reduce the environmental footprint of your home.
With the average house rendering cost starting at around £5,000, it’s not an inexpensive investment. But while there are many property maintenance jobs you can undertake yourself, painting tired walls or treating rotted fences for example, it is highly advisable to leave rendering to the pros. If the wall surface is not perfectly prepared, even the highest-quality rendering material will peel and crack before it should.
Hiring professional and skilled tradespeople is easy at Find a Craftsman. One simple click here gives you access to a choice of specialists who are rendering installation experts and accredited for their skill, integrity and expertise by the Guild of Master Craftsmen. This blog will give you an overview of rendering cost, e.g. silicone render cost, an explanation of the steps involved, different types of rendering available and their suitability, and other key things to consider.
An understanding of the entire rendering process is advisable, even if you do hire a Find a Craftsman tradesperson to do the job.
1 Wall preparation: Repairs to the brickwork and an assessment of structural damage/stability are important parts of this. Features including alarm boxes, drainpipes and weather protectors around windows and door frames will also need to be removed and refixed at the end.
2 Insulation layer: This forms the base of the installation and comes in sheet form or block cladding. You can also add insulation internally if this is easier. Note that cavity insulated homes should not require this in most instances.
3 The right foundation: A vital stage, where a render ‘mesh’ or scratch layer is applied, to make sure the subsequent layers stick and don’t crack prematurely.
4 Render layers: Depending on whether you plump for cement, lime, acrylic or resin-based materials, the number of layers required will vary.
5 Finishing touches: One advantage of contemporary resin-based renders is that they come in pre-coloured options, so they are good to go. A textured finish, such as pebbledash or roughcast may be used to give increased weather resilience. At this stage, you may choose to paint the dried render yourself, as a way to keep costs down.
If you’re scratching your head over the bewildering choice of rendering options, the table below will help.
• Breathable, flexible and damp-proof.
• Good choice for period properties.
• Affordability makes this the most popular choice, but it does require multiple layers.
• The cement-based render is simply sprayed onto the surface and only requires a single layer.
• Can be applied to existing renders as a topcoat. Silicone also reduces the amount of future cleaning required.
• Strong plastic polymers cut down on the risk of early cracking. Coloured options negate the need for a final coat of paint and reduce overall cost.
• While some may consider these textured finishes old fashioned, they can both increase insulation and protect properties in high-rain areas. Some pebble-dashed buildings are still going strong, over 100 years later. Modern aggregates can create a more contemporary finish.
Now you’ve got a better idea of the material you want to use, take a look at the average supply-only cost. We will go into labour and installation costs further down.
Type of render
Semi-detached house (200m2)
*Source: Myjobquote.co.uk, 2022
High-quality render brands
Now it’s time to consider the advantages of using a specific render brand that your skilled Find a Craftsman installer may recommend.
This waterproof coloured silicone lasts way longer than traditional cement and you can choose from silicone thin coat or silicone scraped texture, depending on the finish you want to achieve. While it is substantially more expensive – k render cost per m2 comes in at between £30–£70, depending on your location – it requires no maintenance.
If you’re going down the pebbledash route, this brand has a one-coat rendering product that can save you time and cash. Weber render cost per m2 ranges from £25–£65, and your choice will again be affected by the durability and longevity you desire.
This brand offers monocouche, acrylic and silicone renders amongst others and it’s a go-to choice for more industrial-scale undertakings such as bridges and railways. Therefore you can be confident in a long lifespan. Parex render cost per m2 ranges from £20–£60, dependent on location and render selection.
Rendering can be a time-consuming process – for example, a large, detached home may take up to two weeks. Let’s consider the ‘extras’ you should think about.
As our blog has outlined, there are many aspects to rendering work you may not have previously been aware of. As the UK’s most established trade association, The Guild of Master Craftsmen has been proudly representing tradespeople and artisans who have skill, integrity and expertise for over 40 years. At Find a Craftsman, hundreds of reliable, trustworthy and experienced contractors all over the UK are at your fingertips, so you’ll have peace of mind that the completed rendering will stick around for a long time to come.