Rendered walls are a common feature used in many homes and buildings, offering a smooth and modern look. However, like all exterior surfaces, they are prone to dirt, grime, algae, and moss. Cleaning rendered walls is an easy process, but doing it properly can help maintain their appearance and prevent long-term damage.
In this blog, we will identify everything you need to know about cleaning rendered walls, including cleaning methods and safety tips.
What is Render and Why Does it Get Dirty?
Render is a type of plaster that is applied to the external walls to create a smooth and textured design. Render can be made from a variety of materials, including cement, lime, or a synthetic mixture. Its main purposes are to:
- Protect the underlying brickwork or blockwork
- Improve the appearance of a building
- Add insulation or weather resistance
Even though render is effective for protecting your home, it is constantly exposed to different factors, leading to the buildup of dirt and grime. Here are some of these factors:
- Weather Exposure: Rain, wind, and pollution can carry dirt and particles that stick to the surface of render.
- Air Pollution: Vehicle emissions and industrial pollutants can lead to black streaks or sooty stains.
- Poor Drainage: Water running down walls can leave unsightly streaks and encourage moss growth.
What is the Best Cleaner for Render?
When it comes to cleaning rendered walls, choosing the best cleaner is key for achieving effective results. Finding the best cleaner depends on the type of render and level of dirt you are dealing with. Here are some of the best options for cleaning rendered walls:
- Soft wash render cleaner
- K-Rend K-Pro cleaner
- Algoclear pro
Can I Pressure Wash Render?
A common question asked regarding render cleaning is whether pressure washing is an effective option. While it can be effective, for some surfaces, pressure washing can pose risks when used on render:
- High risk of damage
- Water penetration
- Uneven cleaning
For delicate or older render, soft washing is a safer option. It uses low pressure and specialist cleaning solutions to break down grime and organic matter without the risk of damage.
Step-by-Step Guide to Cleaning Rendered Walls
Step 1: Inspect the Surface
Before you start cleaning, carefully inspect the walls for any damage, cracks, or loose render. High-pressure washing on damaged areas can cause more harm than good. If you notice any significant issues, it’s important to get these repaired before cleaning.
Step 2: Dry Brush to Remove Loose Dirt
Use a soft-bristled brush to gently remove loose dust and dirt. This step makes the washing process much more effective. Avoid using wire brushes, as they can scratch or damage the render.
Step 3: Wet the Wall
Before applying any cleaning solution, dampen the wall with water using a garden hose or low-pressure washer. This prevents the wall from absorbing too much of the cleaning product and helps loosen any dirt or grime on the surface.
Step 4: Apply Cleaning Solution
Mix the cleaning product with warm water or use a specially formulated render cleaner. Apply it to the wall with a sponge, cloth, or low-pressure spray. For heavily soiled areas, you may need to allow the cleaner to sit for about 10–15 minutes to break down the dirt.
Step 5: Gentle Scrubbing
After allowing the solution to soak, gently scrub the wall using a soft brush. Make sure to pay much attention to areas with noticeable staining, algae, or mold growth. Patience is key during this step and vigorous scrubbing can damage the render’s surface.
Step 6: Rinse Thoroughly
Use a garden hose or a low-pressure washer to thoroughly rinse the wall. Start from the top and work your way down to avoid streaks. Make sure all soap and residue are removed, as leftover cleaner can attract more dirt.
How to Clean Render Before Painting
If you have a rendered wall that needs painting, the first step that you need to take is to make sure that the rendered wall is prepared properly. It is important to clean the render by removing any dirt or flaky paint on the surface.
Prepare the paint once the wall is ready and make sure that the paint is suitable for exterior walls. Stir the paint well until the consistently is right and make sure the rollers and brushes are clean.
Taking the right approach is essential when it comes to cleaning render to avoid any damage. If you are unsure of what approach to take or don’t have the right equipment, always consult with an expert like Total Gleam.
Total Gleam is Here to Help!
With the right approach you can clean your rendered wall safely and effectively. To find the right approach for you, take time to assess the features of your wall in order to identify a long-term solution. Regular render maintenance can be time consuming but will ensure that your render is kept free of all dirt buildup.
At Total Gleam, our team of experts have got you covered with effective render cleaning services. We are specialists when it comes to exterior cleaning, so don’t hesitate to contact us today for render cleaning services.
