5 Signs Your Building's Facade Needs Professional Cleaning
Algae streaks, dulled render and recurring stains aren't just cosmetic — they're signs your facade needs professional cleaning.
A building's facade takes the brunt of the weather all year round — rain, frost, pollution, and in coastal areas like Tallinn, salt-laden sea air. Over time this shows, but the warning signs are often dismissed as "just weathering." Here's what to actually watch for.
1. Green or black streaking
Algae and mould thrive on north-facing walls and shaded corners where moisture lingers. Streaking usually starts small but spreads quickly once established, and it's a sign the surface is staying damp longer than it should.
2. Dulled or chalky render
Render and painted surfaces naturally lose their sheen as dirt embeds into the texture. If a wall looks noticeably duller than it did a year or two ago, that's accumulated grime — not just aging material.
3. Stains below windows and ledges
Run-off stains under windowsills and ledges are a classic sign of dirt being washed down the facade during rain, rather than being rinsed away cleanly. Left alone, these stains become harder to remove the longer they set.
4. Visible buildup around joints and seams
Dirt collects in the texture of brick joints, cladding seams and decorative details long before it's obvious on flat surfaces. By the time it's visible at a glance, it's often been building for a season or more.
5. A general "tired" look compared to neighbouring buildings
Sometimes the clearest sign is simply comparison — a facade that looks noticeably older or dirtier than similar buildings nearby usually just hasn't been cleaned in a while.
Why professional cleaning matters
Pressure washing the wrong surface with the wrong settings can force water behind cladding or strip protective coatings. Our crews assess the facade material first — render, brick, cladding or glass — and adjust pressure, temperature and detergents accordingly, using biodegradable products that are safe for surrounding plants and pavement.
Regular facade cleaning isn't just cosmetic maintenance. It protects the building envelope from long-term water damage and extends the life of paint, render and sealants.