Care Notes for Render

All Render Types

It’s important to take good care of your render finish if you want it to last its full lifetime. There are many different types of render finishes we offer, below we have given lots of advice for the various types. If you are unsure of what type you have do give us a call!

Monocouche scratch

We recommend that, for our Monocouche Scratch Render, your render aftercare should involve giving it a gentle pressure wash or hand wash every 6-12 months (or just when it’s looking a bit grubby). This should alleviate the need to use harsh cleaning chemicals further down the line (which could break down the render). This will also eliminate any build-up of dirt, giving you a sparkling and pleasing finish!

When cleaning your Monocouche Scratch Render, it is imperative that your render has been allowed to set for at least 28 days. You shouldn’t even really need to clean your render at this stage, and therefore we advise that you refrain from any serious render maintenance during this time period. This is because the Monocouche Render takes around 28 days (or more) to reach optimum strength. So, if you are a bit over-eager and you give it a power wash before it’s fully cured, then you could do some real damage and end up spending more money trying to get it fixed.

Once you have passed this 28+day period, if you are keen to give your render a wash down then we suggest that you first hose down the render to remove any surface dirt. When hosing down your render, we recommend you use a fan tip rather than a direct needlepoint spray as this is harsh and could weaken the render. After this, using a brush, apply hot soapy water to any areas that are particularly affected by dirt. Make sure that you rinse off the detergent as you go.

If your Monocouche Render is showing signs of mould growth, then the best thing to do is to apply a Fungicidal Wash such as WEI-360. The active ingredient in this Fungicidal Wash is Benzalkonium Chloride, a proven biocide. This is a really effective aftercare treatment as it removes mould and organic growth. You can apply this with a sponge, cloth or knapsack spray, then leave it to dry for 24 hours.

Silicone/Silicone Silicate Render

Because Silicone Render is hydrophobic, it should resist organic growth really effectively, which means that it requires very little maintenance over the course of its lifetime. For Silicone Render, it’s best to just clean it as and when needed, as it’s unlikely that the render will show much dirt. However, lighter colours are more likely to be susceptible to showing dirt, and if this is the case then the best method for cleaning the render is to use soapy water and a sponge, or a low-pressure jet wash. Do not use any acid cleaners as this could damage the render.

If the level of render maintenance required is of a higher level, it is possible to paint over the render surface with silicone paint. If you’ve used an EWI Pro Silicone Render then you can easily match the Silicone Paint to the render. You’ll need to give the render surface a gentle jet wash, leave to dry and then paint over. Applying silicone paint should reinforce the hydrophobic properties of the render and extend its lifetime. We do recommend that to achieve the best results, you should hire a professional tradesman who is familiar with the materials to carry this out.

Again, in the event that mould growth appears, this should be treated with EWI-360 Fungicidal Wash.

Acrylic Render

Acrylic Render does not possess the same hydrophobic properties as silicone-based renders do. Therefore, you may find that grime and pollution affect the appearance of the render overtime. As well as this, if you live in an especially wet climate then damp and mould could appear on your render. In general, the larger the grain size of your chosen render, the more likely it is that the render will retain dirt.

In these instances, you can use a stiff-bristled brush and warm water with a household detergent – or if the exterior is particularly grimy, a low-pressure jet wash should do the trick. As with Monocouche, you should look into giving your render a gentle wash every year or so. If you are experiencing heavy staining on your render then we recommend that really the only option for you is to paint over the facade with the EWI-005 Silicone Paint.