Cleaning before decorating isn't optional — it's essential. Here's why and how professional cleaning prepares surfaces for treatment.
Any external decoration — whether painting, staining, or applying a treatment — will last far longer on a properly cleaned surface. Paint or stain applied over algae, moss, or surface grime won't adhere correctly. The organic growth beneath the coating holds moisture against the surface, causing the coating to blister, peel, or fail prematurely. A professional clean before decorating is always the right first step.
The cleaning must be thorough — not just visually clean but genuinely free of biological growth including root systems that may not be visible to the naked eye. Biocidal pre-treatment before washing ensures that root systems are killed, not just the surface growth. After washing, the surface should be allowed to dry fully before any coating is applied. This may take several days in cool or humid weather.
External woodwork — fascias, window frames, bargeboards, fencing, and cladding — benefits particularly from professional cleaning before repainting. A clean, sound surface takes paint evenly and bonds well, giving a professional finish. A dirty or algae-contaminated surface produces an uneven result that fails early. For any significant exterior decoration project, budget for professional cleaning as the essential first stage.
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