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How to Render an Exterior Wall


Want to know how to render an exterior wall? Keep on reading and we’ll tell you all you need to know…

Rendering a wall is a preparation process that is required if you are to apply any sort of external wall insulation material, as the process ensures the surface is clean and ready for application.

This is not just confined to wall insulation though – rendering is a job that takes place throughout many other applications in the building industry.

First and foremost, we love helping people here at Home Logic and we love being able to enable our customers to achieve their aims and requirements in terms of insulation management, and interior protection.

We’re more than happy to provide advice on how to render an exterior wall – but we also totally recommend that you leave this job to a team of professionals.

We’re not just saying that because we are that team of professionals either – we always recommend this to ensure you obtain the best results possible.

It’s Just Like Plastering

Rendering exterior walls follows a very similar process to plastering internal walls. The jobs are pretty much identical, only one takes place outside and one takes place inside.

As any plasterer will tell you, this job requires some level of skill and takes plenty of practice in order to perfect. You can’t just pick up a trowel and become an expert overnight – unless you’re some form of rendering prodigy, and if this is the case, please do give us a call!

As mentioned above, we do not advise you to start rendering your own exterior walls without some technical experience or expert assistance.

If you’d like to know how we can help you give us a call on give us a call on 0800 1700 636 or send an email to [email protected].

How to Render an Exterior Wall

How to Render an Exterior Wall

Before you begin, it’s vital that you clean your wall space thoroughly. Use a stiff bristled broom to ensure the walls are dust-free and grease-free, as well as removing any loose paint or debris as you go.

It’s also important to remove plants and mould, preferably with the use of bleach or fungicide solution.

After everything has been removed, hose down the wall to remove any final bits of dust and dirt. It also helps to brush coarse bricks with some water before you begin to minimise dust and to provide a better surface for the render to adhere to.

Mix your rendering materials together with some water, until you obtain a toothpaste-like consistency. This means your rendering material is ready to go.

Installation experts use a variation of techniques when it comes to application. You can tilt a hawk onto the trowel before applying the render at a 45-degree angle. Alternatively, you can place the hawk’s edge on the wall, and brush upwards.

Drying time should last around 30 minutes until the render is firm enough to touch and flatten out using a straight edge.

If you have any holes, you can fill them in with more render, before applying a float to the wall. This smooths the surface, fills in any remaining holes and improves the appearance of the wall. It also makes it far more durable.

If your wall becomes dry during the process you may want to add a little water. Lastly, sponge the wall with a damp sponge, to provide the perfect finish.


Contact Home Logic for More Information

Contact us for more information on how to render an exterior wall – just give us a call on 800 1700 636. Our expert team of advisers are on hand throughout the day to advise you on any of your insulation management queries.

Contacting us outside of our usual operating hours? Send us an email instead – [email protected].

You can also obtain a free site survey  to see if external wall insulation is something that could benefit your home. It’s worth checking, with no-obligation whatsoever!

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