Steam Clean Commercial Cladding - Dunstable (April 2026)

In April 2026, we completed a full exterior steam cleaning project for a commercial unit in Dunstable, Bedfordshire (LU5). The building features a mix of dark-grey corrugated metal cladding and horizontal silver cladding panels across all four elevations, with roller shutter doors and framed glazing. Years of algae staining and atmospheric soiling had built up at the base of the walls and across the roller shutters, leaving the facade tired and patchy. We steam cleaned the entire perimeter in a single visit and rinsed down all windows afterwards - every surface handled without touching the main trading hours of the business inside.

Project Summary

• Location: Dunstable, Bedfordshire (LU5)
• Date: 22 April 2026
• Property type: Commercial unit on an industrial estate
• Surfaces cleaned: Corrugated dark-grey metal cladding, horizontal silver cladding panels, roller shutter doors, window frames, glazing
• Scope: All four elevations of the building, plus post-clean window rinse
• Main issues: Algae staining at the base of walls, atmospheric grime on cladding panels, soiled roller shutters
• Methods used: Hot water steam cleaning with controlled pressure, window rinse on completion
• Optional add-on: DDAC biocide treatment available to slow regrowth (quoted separately)

The Problem

The building sits on an industrial estate with a narrow passageway on one side and a gravel border along the main elevation. Corrugated metal panels collect dust, pollen, and grit at the ridges, and the base of the cladding had developed a dark algae band from ground-level moisture and splashback. Silver horizontal cladding on the modern side of the building had lost its sheen to atmospheric soiling, and the roller shutters looked dull from years of weathering. The client also flagged that cleaning the exterior would almost certainly leave the windows streaky afterwards, so a post-clean rinse needed to be built into the scope.

Pressure washing alone would have struggled on the roller shutters and the fine-profile silver panels without risking uneven results or driving water into panel joints. The solution had to be gentle enough for painted shutters and glazing seals, strong enough to lift algae, and quick enough to be done in a single visit.

Our Approach

1. Site walk-round and access plan. We mapped the four elevations, identified the narrow passageway between the building and the neighbouring unit, and agreed the route for hoses and the steam unit. Gravel borders and landscaping were protected before work started.
2. Hot water steam cleaning at controlled pressure. Heated water softens algae and organic staining without needing high PSI, so the cladding panels, joints, and painted roller shutters all stayed safe. The lance was held close to the surface on the corrugated panels and swept consistently across the horizontal silver cladding to avoid stripes.
3. Base-of-wall band. The algae band at ground level needed a second pass. Heat and dwell time did the work - we did not step the pressure up to compensate.
4. Roller shutters and door frames. Steam cleaning lifted the grey film from the shutters and restored the original painted finish around the door frames.
5. Window rinse. Because steam cleaning the walls throws droplets and grime onto the glass, we finished with a full window rinse so the glazing was left clean rather than spotted.

Results

• Algae staining removed from the base of all four elevations
• Corrugated dark-grey cladding returned to a uniform factory finish
• Horizontal silver cladding restored to its original sheen
• Roller shutter doors and door frames cleaned without paint damage
• Windows rinsed clear after the wall clean - no streaks, no overspray left behind
• Completed in a single visit, no disruption to the business inside the unit

Why Steam Cleaning for Commercial Cladding?

Steam cleaning uses heat and dwell time to break down organic growth, which means the pressure settings stay gentle. That matters on commercial cladding where panel coatings, seal lines between panels, and painted features like roller shutters are easy to damage with aggressive jetting. For lightly soiled buildings and painted finishes, steam is the most controllable method. For heavier or long-neglected buildings we still follow up with a DDAC biocide to slow regrowth - the client had this quoted as an optional add-on on this job, and it stays a standing recommendation for any commercial facade that stays clean for multiple years between visits.

Related Services

• Cladding & Facade Cleaning - full method detail and pricing
• Pressure & Steam Washing - when to use steam instead of cold pressure
• Commercial Exterior Cleaning in Dunstable - all commercial services for the LU5 area
• Commercial Exterior Cleaning in Luton - neighbouring area coverage