Rendering is used to protect external walls and brickwork from the weather.
It is usually made up of a mixture of sand, cement and aggregate. This is then applied to the external wall to create a protective layer.
There are many different styles of rendering available, each with different costs associated with it.
This article will cover what different types of rendering cost, factors that affect the cost and other information related to rendering.
Average Render Cost Per m²
Below is a breakdown of the labour and material costs that make up a render cost. Costs are based within a South East location.
|Item||Labour Cost Per m²||Material Cost Per m²||Total Cost Per m²|
|Through Colour Render||£31||£20||£51|
You aren’t required to paint all types of render, but the painting costs need to be added on top of the render m² if it is needed.
Based on the m² prices above, this corresponds to the different types of houses below. Generally, the higher the m² coverage needed, the lower the figure within the range.
|Description of Work||Render Area||Total Cost|
|Terraced House (2 faces rendered): 5m x 7m x 6m||70m²||£2100 - £4200|
|Semi Detached House (3 faces rendered): 6m x 8m x 6m||120m²||£3600 - £7200|
|Detached House(4 faces rendered): 7m x 9m x 6m||192m²||£5760 - £11520|
Factors That Affect the Cost of Rendering
- The thickness of render chosen. 10mm thick application cheaper than a 13mm thick application for example.
- Whether the render needs painting. Where paint required will incur additional cost than where not.
- Location. The prices quoted in the table above apply for the South East or Outer London area. The adjustments below can be used to calculate costs in your area.
Region % Adjustment
South East (Southampton, Oxford, Kent, Outer London) 0
Inner London +4%
South West (Bristol, Exeter) -4%
West Midlands (Birmingham) -10%
East Midlands (Northampton, Nottingham, Leicester) -10%
East Anglia (Cambridge, Norwich, Ipswich) -5%
North West (Liverpool, Manchester) -12%
Yorkshire and Humberside (Leeds, Sheffield) -11%
North East (Newcastle, Sunderland) -10%
Scotland (Edinburgh, Glasgow) -6%
Wales (Cardiff, Swansea) -9%
Northern Ireland (Belfast) -12%
Which Render Should I Choose?
Cement render is very durable and stronger than lime. They are the most cost-effective solution compared to other types of render and quickly. This makes them one of the most popular types of render used.
However, a cement render like Portland render is very rigid and can crack/break easily. This makes it less suitable for older houses.
Lime render is a very breathable material. This means it can expand and contract on the surface of any building, making it a popular choice for wooden and older buildings.
This is a new render. It used a silicone water repellent than easily repels water on the surface whilst allowing water vapour to pass through. This lets the substrate beneath it expand and contract easily.
Although it is less popular than cement and lime render, it can be a good alternative for many brick and wooden homes.
Monocouche render is a new render that doesn’t need a base coat. It is a good render to protect the wall from the elements whilst allowing a different visual style.
They can be used in various colours by adding lime and polymer renders.
Acrylic render is used to add an additional finishing rendering coat to the previous renders. Because it contains aggregates, it provides a texture that isn’t flat. It helps seal the render and the surface beneath it. It also hides defects well.
Benefits of Rendering
Rendering allows you to cover up old brickwork and add attractive colour options. This can help make your home look more modern and increase its property value.
Weatherproof Existing Walls
External walls can be weathered and damaged over time by the elements. This can cause water to enter and damage the existing render. Applying a render forms a barrier that protects the building from further damage.
Increase Thermal Insulation
Although the process is more complication and not that popular, an insulation render can be applied to the exterior of your property to form an eternal wall insulation system. This would replace installing cavity wall insulation.
Cons of Rendering
- Render requires some maintenance regularly to avoid issues caused by exposure to weather, such as cracking and the top coat of paint peeling.
- The initial cost of rendering your property can be preventative. The realisation of the investment can be pretty slow.
- Depending on your location, you may require planning permission to install some renders. There may also be limits on colours you can use.
- If your exterior walls have external features, such as vents or alarm boxes, this may require additional work that can increase the price of the works.
- Application of render can only take place in warm weather conditions. If applied during cold weather, it may not dry and can be more liable to cracking and damage.
What is Render?
A render is a coating to an external wall on a building, which protects the exterior from damage caused by rain and cold weather. The plasterer then finishes the render with a top coat of paint to reduce the chance of the render cracking and being penetrated by dampness and moisture.
If the exterior of a building is not protected, problems will arise due to weathering and erosion. Therefore, to mitigate against this, contractors will apply a layer of cement, lime, or resin-based render to the walls.
This will increase the life expectancy of the exterior of your building and reduce long-term maintenance costs.
Render is made up of cement, lime or resin-based powders or liquids mixed with water or other chemicals to form an easily smoothed substance that can be applied to walls. This is usually done using a plasterer’s trowel to create a water-resistant barrier.
Cement and lime make up more traditional renders, while modern resin renders are liquid-based, often pre-mixed and ready to apply.
Planning Permission and Building Regulations
If you are an existing homeowner looking to replace the entire finish of the exterior of your house with render, the works will be covered under permitted development rights. This means that you don’t require additional planning permission.
Building regulations apply to houses where at least 50% of an individual wall or 25% of the entire property is rendered. These specifically apply to the need to reach a specific thermal efficiency, which may necessitate the use of additional insulation.
How Render is Applied
Applying render will depend on the type of render you choose. However, the general approach will be as follows:
Before starting, an assessment of the building’s walls should be undertaken. The structural stability of the brickwork should be assessed and any repairs made if any significant cracks or weaknesses are found.
External features attached to walls need to be removed (drainpipes etc.). A metal bead is attached to ensure the render is finished with clean edges and corners.
Depending on the render type, the contractor will begin by creating the mixture. A cement-based render will usually be a 1:2:2 mix of cement, building sand and sharp sand.
A thin coat (approx. 5mm) will be applied to a damp wall. It is essential to ensure the wall is not too wet as the render will not stick. The thin first coat will suck into the wall. If it is too thin, it will not be effective as a base; if it’s too thick, it will not stick to the wall.
The first coat will be scratched to provide a key. This will open it up slightly before it dries to help the application of further layers.
A second (and usually final) coat will then be applied, twice as thick as the base layer. While this layer is still wet, timber is used to smooth the render and ensure it is evenly spread.
3. The Finish
While the render is drying, a float will be moved over the render to close any holes and provide a smooth finish.
Once the render is dry, a damp sponge can be applied to perfect the quality of the finish.
If a pre-coloured render has been applied, the render is complete. However, if not, once the render is completely dry, the painted finish can be used.
Finally, any external fittings will need to be re-attached to the walls.
The level of maintenance required to keep a rendered finish looking fresh depends on the render base. Most types will need a fresh coat of paint every five to ten years. This can be a difficult and time-consuming process.
A cheaper way to keep your finish neat is by cleaning it annually. Be aware that using a high-pressure jet washer can severely damage the render. Using a low-pressure washer with a brush attachment and some soapy water is advisable.
All types of render will require the top coat to be reapplied at some stage. However, you can extend the life of this by undertaking regular maintenance.
What To Look For in a Rendering Contractor
There are several things to look for when searching for a rendering contractor to provide you with peace of mind that you will receive a quality job.
- Always get a written quote from contractors.
- Look for tradespeople that have City and Guild qualifications as a minimum.
- Ask for proof of insurance and liability.
- Get a written receipt after making a payment.
- Get a written contract outlining the scope of work and costs before the job begins.
- Ask for references and photos of previous jobs and look for reviews.
Get Prices On Rendering Near You
We’ve done our best to give you a good idea of what you can expect to pay for rendering.
However, our guides are not a substitute for a fixed written quote specifically for you.
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