The Forensic Case Log — the science beneath the surface
These aren't before-and-after photos. They're the physical science behind why your building looks the way it does — published openly, whether you ever hire us or not.
Residential
Commercial
Facilities Management
Heritage
Why one wall goes green and the wall beside it doesn't
For decades, exterior cleaning has been a frustrating loop: wash the surface, watch the green creep back the next year, and start hunting for a new contractor when the last one let you down. That loop is exhausting — and quietly expensive — because it treats the symptom and ignores the cause.
The staining on your render, the dark line along your window seals, the haze on your glass — that is rarely neglect. It is a biological and physical response to moisture, building materials and your local microclimate. Treat the cause and the cycle slows down. Blast it with high pressure and you strip the surface's own defences, so it returns faster and grips harder. We would rather you understood the difference than paid for it twice.
Residential
A neglected hot tub left standing and green — its acrylic shell carefully cleaned of algae and biofilm, hygienic and presentable for the home's new owner.
Heritage
The tall windows of a restored 1845 former chapel, gently cleaned — daylight restored, historic glass and brickwork protected.
Heritage
The leaded lights of a Grade II listed medieval hall house, cleaned by hand with pure water — historic glass and lead untouched.
Facilities Management
A multi-let commercial roofline cleared and documented to WAHR 2005 — flow restored and the water-ingress pathway closed.
Residential
Interior glazing cleared of everyday film and condensation haze — daylight restored, coatings and finishes protected.
Residential
A shaded, north-facing elevation cleared of algae with pure-water care — clarity restored, frames and seals protected.
A quick guide to what you'll see here
We bring you into our world rather than hide behind jargon. A few terms you'll meet as you read the logs, and what they mean for your home or building:
Biological colonisation
What most people call "dirt" or "grime" is usually living algae, lichen or biofilm. It clings to the surface and thrives wherever moisture lingers — so it's a living problem, not a loose one, which is why a quick wipe never truly clears it.
Time-of-wetness
Simply how long a wall or roof stays damp after rain. A shaded, north-facing surface stays wet far longer than a sunny, south-facing one — which is exactly why it colonises first. It reflects your building's aspect and microclimate, not how well you keep your home.
Kinetic vandalism
The microscopic, invisible damage done by blasting building materials with high-pressure water. It strips protective layers and roughens the surface — which actually invites the growth back faster and deeper. The clean looks instant; the harm shows up later.
Substrate stewardship
Our core philosophy. We use neutral surfactants and low-pressure, pure-water methods to gently release biological growth while protecting the material underneath — rather than slowly destroying it to buy a temporary shine.
Find your world
Every building tells a different story, and every owner reads it differently. Filter the log by what you're looking after — each path speaks in the terms that matter to you.
Our honesty promise
Our credibility is built on real, lived work and ground-truth physics — not sales pitches or paperwork we don't hold. We promise plain, honest answers about your property: exactly what is happening to it, and why. And if a gentle maintenance interval is all you need — or your property doesn't need us yet — we will tell you that too. That is the whole point.
Explore the case studies below. Understand your building. If we're the right fit to protect it, we're here.
Find your world
Every building tells a different story, and every owner reads it differently. Filter the log by what you're looking after — each path speaks in the terms that matter to you.