Pebbledash is an exceptionally durable, textured exterior wall finish that has adorned British homes for decades. This distinctive surface not only shields properties from harsh weather conditions but also contributes a unique aesthetic quality that many homeowners appreciate. However, the characteristically rough and uneven texture of pebbledash presents particular maintenance challenges over time. The textured surface tends to trap dirt, grime, and moisture, often leading to unsightly mould, algae, and moss growth that can significantly diminish your property's appearance.
While pebbledash remains a highly effective and weather-resistant option for protecting your home, maintaining its appearance through regular upkeep is essential. This guide explores comprehensive methods for cleaning pebbledash and outlines additional treatments to ensure it both looks and performs at its best for years to come.
Pebbledash, created by embedding small stones into a layer of cement or lime mortar on exterior walls, forms an intentionally uneven surface. This texture, while visually distinctive and protective, creates numerous small crevices that readily collect dirt and provide the perfect environment for organic growth such as moss, lichen, and algae. Over time, this accumulation can make even well-built homes appear neglected and poorly maintained.
Unlike smooth rendered surfaces which can be simply wiped clean or repainted, pebbledash requires more specialised cleaning techniques. It's worth noting that high-pressure washing, whilst tempting as a quick solution, can often cause more harm than good. Excessive pressure can dislodge the embedded stones, force moisture into tiny cracks, and potentially compromise the structural integrity of the finish.
Before beginning any cleaning procedure, thoroughly assess the condition of your pebbledash to identify areas of damage, loose stones, or significant deterioration that may require repair before cleaning. Cover plants, windows, and doors to protect them from cleaning solutions and debris.
Remove loose dirt, cobwebs, and debris using a stiff-bristled brush with firm but controlled strokes. Work methodically in sections, brushing in multiple directions to access all the recessed areas between stones.
Apply a specialised façade cleaner or mild detergent solution using a low-pressure garden sprayer. Ensure the cleaning agent is suitable for pebbledash and won't cause discolouration. For stubborn biological growth, consider a targeted fungicidal wash containing biocides specifically designed to eliminate moss, algae, and lichen.
After allowing the cleaning solution sufficient dwell time (typically 15-30 minutes), scrub the surface thoroughly using a stiff brush. Work in multiple directions to ensure all depressions and crevices receive attention. For particularly challenging areas, a soft-bristled brush may help reach deeper without dislodging stones.
Rinse the cleaned surfaces methodically with clean water, ideally using a hose with moderate pressure. A gentle pressure washer may be used only on its lowest setting, maintaining a distance of at least 30cm from the wall to prevent damage to the pebbledash texture.
Once the pebbledash is completely dry consider applying:
Investing in professional pebbledash cleaning and maintenance delivers numerous significant advantages:
If you would like to know more about how we can help you to clean, restore and protect your pebble dash walls, or for more information about other exterior wall refurbishment options, then please contact us to speak to a member of the team.