By Ratebee · Published August 27, 2026
Green film on the north wall is alive, and the wrong pressure will cost more than the cleaning saved. How Estonian facade washers work, and what to establish before anyone points a lance at your house.
The grey-green film that creeps up the north and shaded walls of Estonian houses is not dirt in the ordinary sense. It is biological growth — algae, later moss and lichen — that thrives on a damp surface in a climate with long wet autumns and little winter sun. That matters, because rinsing it off with water alone removes the colour and leaves the organism, which is why an untreated wall looks clean in May and green again by September.
It also explains the honest limits of the service. Washing restores a surface; it does not repair one. If the render is crazed, the paint is failing or the wooden cladding has gone soft, washing will expose that rather than fix it — and a good contractor will tell you so before quoting, not after.
Material decides method, and the difference is not cosmetic. Thin-coat render and insulated facades are the fragile case: a high-pressure lance held too close strips the coating and drives water into the insulation behind it, and that damage surfaces months later as staining and frost damage. Painted wooden cladding needs low pressure and patience, because water forced up under the boards leaves rot where nobody can see it. Brick and stone tolerate more, but the mortar joints do not. Glass, metal and composite panels are their own discipline.
So the diagnostic is simple: if the person quoting does not ask what the facade is made of and how old it is, they are quoting for a pressure washer, not for your house. In Estonia the tools on offer genuinely differ — heated water, soft washing with a cleaning agent and low pressure, and soda or sand blasting for heavy cases such as old log walls. Blasting in particular is a specialist job with a specialist's price; it is excellent on the right surface and ruinous on the wrong one.
Because the growth is biological, a proper wash uses a treatment agent and dwell time, not brute force. Ask what will be applied, whether it needs rinsing off, and how long it is expected to hold before the green returns — that expectation is a fair thing to ask for and a reasonable thing to judge a firm on later.
Then ask the unglamorous question: what happens to the runoff. Everything you take off the wall lands in the beds, the lawn and the soil under them. Firms that do this regularly cover plants, pre-water them, or choose agents accordingly. Firms that do not will leave you a clean wall and a dead border.
Settle the small print too: whose water and electricity, whether windows are washed afterwards (a facade wash leaves them filthy), whether gutters and drainpipes are included, and who moves the garden furniture.
“Facade & window washing”, Estonia — in the catalogue: 23, with ratings so far: 0. The list is live: it changes as businesses are added and rated.
Access is the other half of the price. For a normal house, telescopic poles with purified water reach the upper storeys from the ground with no marks on the wall. Higher work means a lift, which must physically reach the wall — soft ground, a fence or a neighbour's hedge can rule it out. Above that, rope access: trained industrial climbers working from the roof.
These are not interchangeable, and the honest firms say which one they will use before arriving. If the answer is rope access, it is fair to ask about certification and about liability insurance — you are letting people hang off your building.
This is warm-season work. Cleaning agents need above-freezing temperatures to act, and water left on a wall before a frost is its own problem, so the window runs roughly from spring to early autumn — with a queue in the weeks after the first warm spell.
Get two quotes, and make them comparable by giving both the same information: wall material, approximate area, number of storeys, and what the surface looks like now. Prices in this trade are quoted per square metre by some firms and per job by others, so a single number on its own tells you very little.
Be careful with: a price quoted over the phone without a single question about the material; a promise to "blast off anything" as a selling point; no company name or registry code anywhere on the site, only a mobile number; demands for a large advance payment; and anyone who dismisses the question of what the agent does to your plants.
A firm worth hiring will happily tell you what it will not do — that this render is too fragile for pressure, that this wall needs painting rather than washing, that the green will be back in two years. Those are the answers of someone who intends to be traceable afterwards.