How to Easily Clean Rendered Walls: Step-by-Step Guide

To clean rendered walls, mix a solution of equal parts of bleach and water, apply it to the walls, and rinse off with water. Rendered walls are a popular choice for homeowners due to their durability and attractive finish.

Over time, however, they can become discolored or stained with dirt and pollutants. To keep your rendered walls looking their best, regular cleaning is essential. You don’t need to use expensive cleaning products or hire professionals to do the job.

In fact, you can clean your rendered walls effectively with just a few household ingredients and tools. In this article, we’ll provide you with step-by-step instructions on how to clean rendered walls efficiently.

Understanding Rendered Walls And Why They Need Cleaning

What Are Rendered Walls?

Rendered walls are walls made from a combination of cement, sand, and water or other materials. This mixture forms a protective coating on external and internal walls of buildings. The rendering process creates a smooth, flat finish on the walls, which can be painted or left unfinished.

Rendered walls are commonly found in both residential and commercial construction projects.

Some common types of rendered walls include:

  • Cement rendered walls: Where cement, sand, and water are combined to create a strong and durable finish.
  • Lime rendered walls: Where lime is used instead of cement, making it more environmentally friendly.
  • Acrylic rendered walls: Which are made using a pre-mixed acrylic polymer that offers greater flexibility and is ideal for use over brickwork, concrete, and fibre cement sheeting.

Benefits Of Rendered Walls

Rendered walls offer a variety of benefits including:

  • Durability and protection: Rendered walls are highly durable and provide a protective barrier against environmental factors like rain and wind.
  • Aesthetic appeal: Rendered walls provide a smooth and clean finish that looks great on both residential and commercial buildings.
  • Energy efficiency: Depending on the rendering used, some renderings can offer energy efficiency benefits by providing improved insulation to the building.
  • Increased property value: A well-rendered property will likely have higher resale value than an unrendered property.

Why It’S Important To Clean Rendered Walls

As with any external surface, the render on walls will accumulate dirt, grime, and other unwanted substances over time. External factors like rain, wind, and pollution can lead to the build-up of unsightly stains on rendered walls such as moss, lichen, and algae.

These can not only make your building look unsightly but can also lead to damage to the render over time if left unattended. Here are some reasons to regularly clean your rendered walls:

  • Prevent damage: Over time, built-up grime can lead to damage to the render on your walls, affecting your building’s structural integrity.
  • Health concerns: Moss and algae, as well as other unwanted substances, can pose a health risk to people on your property.
  • Curb appeal: Regular cleaning of rendered walls will enhance the curb appeal of your property and can even increase its value.

Regular cleaning of rendered walls can be done using simple equipment like a pressure washer or a soft-bristled brush to remove dirt, moss, and other substances. A regular cleaning schedule can ensure your rendered walls stay looking great while also increasing their longevity.

Preparation Before Rendered Wall Cleaning

Rendered walls can accumulate dirt, grime, and other unsightly stains over time. It’s important to keep them clean to maintain the exterior appearance of the building. Before starting the cleaning process, it’s important to make some preparations. In this section, we will discuss the essential equipment for cleaning rendered walls, choosing the right cleaning solution, and preparing the surrounding area before cleaning.

Essential Equipment For Cleaning Rendered Walls

To clean rendered walls, you need to have the right equipment. Here is a list of the essential equipment you need to have:

  • Pressure washer: A pressure washer can help to remove stubborn stains and dirt, making the cleaning process easier. Make sure that the pressure washer nozzle isn’t too strong, as it can damage the surface of the rendered wall.
  • Ladder: A ladder will be essential if you have a large building as it can help you reach high areas that need cleaning.
  • Safety gear: Consider wearing goggles, gloves, and a mask to protect yourself from the cleaning solution and any dirt that may splash onto you.
  • Bucket: A bucket can be filled with the cleaning solution and used to clean smaller areas that the pressure washer can’t reach.

Choosing The Right Cleaning Solution

The cleaning solution you choose will depend on the type and severity of the stains on the rendered walls. Here are some tips on how to choose the right cleaning solution:

  • Look for a solution specifically designed for cleaning rendered walls.
  • Avoid using bleach or any acidic solution, as it can damage the surface of the rendered wall.
  • Test the cleaning solution on a small area of the wall to ensure it doesn’t cause any damage.

Preparing The Surrounding Area Before Cleaning

Before you start cleaning the rendered walls, you need to prepare the surrounding area. Here are some tips on how to do it:

  • Cover any plants, bushes, or other vegetation to protect them from the cleaning solution. Use plastic sheeting or a tarp to cover them.
  • Move any outdoor furniture out of the way.
  • Close any doors and windows to prevent the cleaning solution from getting inside the building.
  • Wet the ground around the area you want to clean to prevent the cleaning solution from spreading or staining the ground.

By following these essential steps, you can ensure that the cleaning process goes smoothly and efficiently. Remember to wear safety gear and choose the right cleaning solution to avoid any damage to the rendered walls.

Step-By-Step Guide To Cleaning Rendered Walls

Cleaning rendered walls is an important maintenance task that homeowners should perform regularly. A clean and well-maintained rendered wall not only enhances the overall appearance of your home but also increases its longevity. In this section, we will guide you through the process of cleaning rendered walls step-by-step.

Step 1: Removing Dirt And Debris From The Wall Surface

Before starting the cleaning process, it’s essential to remove any dirt, debris, or loose material from the wall surface. Here are the key points to follow:

  • Use a stiff brush or a vacuum cleaner to remove any loose materials, such as cobwebs, dust, or dirt.
  • Make sure to pay close attention to the corners, edges, and around the windows and doors.
  • If you find any cracks or damages during this process, repair them before starting the cleaning process.

Step 2: Preparing The Cleaning Solution

Once you have removed the dirt and debris, it’s time to prepare the cleaning solution. Here are the key points to follow:

  • Mix warm water and a suitable cleaning agent according to the instructions on the package.
  • Choose a cleaning agent that is suitable for rendered walls, such as a mild detergent or a specialist rendering cleaner.
  • Avoid using harsh chemicals or abrasive cleaners as they can damage the rendered surface.

Step 3: Applying The Cleaning Solution To The Wall Surface

Now that you have prepared the cleaning solution, it’s time to apply it to the rendered wall’s surface. Here are the key points to follow:

  • Dip a soft-bristled brush into the cleaning solution and apply it to a small area of the rendered wall.
  • Work from the bottom up, applying the cleaning solution to one area at a time.
  • Be sure to saturate the surface but avoid flooding it, as this can cause damage.

Step 4: Scrubbing And Cleaning The Wall

After applying the cleaning solution, it’s time to scrub and clean the rendered wall’s surface. Here are the key points to follow:

  • Use a soft-bristled brush to scrub the rendered wall’s surface gently.
  • Work from the bottom up, scrubbing one area at a time.
  • Pay close attention to any stubborn stains or marks, but do not scrub too hard as this can damage the rendered surface.
  • If you are finding it challenging to remove the stains, go back to step 2 and prepare a stronger cleaning solution.

Step 5: Rinsing The Wall Surface

Now that you have scrubbed and cleaned the rendered wall’s surface, it’s time to rinse it with clean water. Here are the key points to follow:

  • Use a hose or a bucket of clean water to rinse the rendered wall’s surface thoroughly.
  • Work from the top down, rinsing one area at a time.
  • Make sure to rinse the surface completely, removing all traces of cleaning solution.
  • Allow the wall surface to dry naturally.

By following the above step-by-step guide, you can clean your rendered walls and keep them looking fresh and clean. Cleaning rendered walls regularly will not only improve the overall appearance of your home but also add value to your property.

Remember to follow the cleaning process manufactured by the manufacturer when cleaning your rendered walls. With these tips, you can successfully clean rendered walls without damaging the surface.

Tips And Tricks For Effective Rendered Wall Cleaning

Rendered walls are a popular and durable finish for many buildings. However, they are prone to dirt and debris build-up, and cleaning them can be a daunting task. Here are some tips and tricks for effective rendered wall cleaning:

Using A Pressure Washer For Cleaning

A pressure washer is an excellent tool for cleaning rendered walls. Follow these key points:

  • Use a low-pressure nozzle setting to avoid causing any damage to the render.
  • Begin by rinsing the wall with water to remove loose dirt and debris.
  • Prepare a cleaning solution by mixing a gentle detergent with warm water. Follow the detergent manufacturer’s instructions for the ratio of detergent to water.
  • Apply the detergent solution to the rendered wall using the pressure washer, taking care not to saturate the render.
  • Rinse the wall with clean water using the pressure washer, starting at the top and working your way down.

Cleaning Hard-To-Reach Areas

Cleaning hard-to-reach areas of rendered walls requires some extra effort. Here are some key points:

  • Use a ladder or scaffolding to reach high areas safely.
  • Use a soft-bristled brush to clean any areas that can’t be reached with a pressure washer.
  • For crevices, use a toothbrush or a small cleaning brush to get into the hard-to-reach spots.
  • For mold or mildew, use a solution of one-part bleach to ten parts water. Apply the solution with a sprayer and scrub the area with a bristle brush.

Tips For Preventing Future Dirt And Debris Build-Up

Preventing dirt and debris build-up on your rendered walls will make cleaning them in the future easier. Here are some key points:

  • Regularly rinse your rendered walls with water, especially during dry and dusty seasons.
  • Trim any trees or bushes that might be overhanging or touching the rendered walls.
  • Repair any cracks or damage to the rendered walls as soon as possible to prevent water from seeping in.
  • Consider using a render protection coating, which can help to repel water and dirt, preventing them from sticking to the rendered walls.

Cleaning rendered walls need not be a daunting task. With the right tools and techniques, you can keep your rendered walls looking clean and beautiful.

Frequently Asked Questions On How To Clean Rendered Walls

How Often Should I Clean Rendered Walls?

Rendered walls should be cleaned at least once per year to keep the dirt and grime buildup at bay. However, if you live near a busy road or a location with high levels of pollutants, consider cleaning your walls more frequently.

Can I Use Bleach To Clean Rendered Walls?

Bleach is not recommended for cleaning rendered walls as it can cause damage and discolouration. Instead, use a specialised render cleaner that is gentle and safe for the surface.

What Equipment Do I Need To Clean Rendered Walls?

To clean rendered walls, you will need a soft-bristled brush, a bucket, a hose, and a specialised render cleaning solution. Make sure to wear protective gloves and goggles during the process.

How Can I Prevent Mould From Growing On My Rendered Walls?

To prevent mould growth, ensure that the rendered walls are well-ventilated, and moisture is not trapped behind the surface. Also, clean any visible mould as soon as possible to prevent it from spreading.

Can I Paint My Rendered Walls After Cleaning?

Yes, you can paint your rendered walls after cleaning. However, make sure that the surface is clean and dry before applying any paint. Use a specialised render paint formulated for the rendered walls.


Taking care of rendered walls can be a challenging task, but it is not impossible. With the right knowledge and tools, you can keep your walls in pristine condition. Remember to inspect your walls regularly, clean them regularly with appropriate cleaning agents and tools, and be cautious when using water pressure washers.

Furthermore, be aware that some damages may require professional assistance, so don’t hesitate to contact experts if necessary. By following these steps, you can avoid costly repairs and keep your rendered walls looking great for years to come. Don’t let dirt and grime build-up ruin your walls’ aesthetics, take action today, and preserve your home’s beauty.

Remember, a little effort can go a long way in maintaining your rendered walls’ health.

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