Office parks age quietly. A building goes up in crisp grey render and composite panel, tenants move in, and fifteen minutes at a time the weather works on the walls until one day the landlord looks at the elevation and sees a building that undersells every desk inside it. That was the position at a two storey office building on a business park outside Milton Keynes, in the north of Buckinghamshire, when the owner asked us to survey it for an exterior wall coating. The lease schedule was healthy, the structure was sound, and the walls looked like the oldest thing in Buckinghamshire.
The building and the brief: an office building near Milton Keynes
The building is a conventional two storey office block of the kind that fills business parks around Milton Keynes and across Buckinghamshire: a steel frame carrying two continuous ribbon glazing bands, with smooth rendered panels and flat composite cladding making up the wall areas between and around the glass. A flat roof sits out of sight behind a slim coping line, and a glazed entrance with a small canopy faces the visitor car park.
The owner wanted more than a like for like refresh. The building sits first in line as visitors come into the park, and the brief was to move it from anonymous grey to a colour with some authority. From the palette we walked through on site, they chose sargasso blue, BS 18C39, a deep navy leaning blue that reads as confident rather than loud, with the sills, copings and frames staying pale grey as trim. It is a combination we rate highly for offices, and you can see it alongside the rest of the range on our coating colours page. The work itself falls under our commercial wall coating service, engineered for exactly this mix of render and panel.
What the survey found
The render had faded from its original grey to something paler and patchier, streaked under every sill where rainwater carries dirt off the glazing line. The composite panels had chalked the way factory finishes do, and there was algae shadowing along the base of the north facing return where the sun never quite dries the wall. Our survey confirmed the render was well bonded with only hairline cracking, and the panels were flat, dry and firmly fixed. Nothing needed replacing. Everything needed recoating, and the report set that out elevation by elevation with photographs before the owner committed to anything. That distinction matters on a steel frame office building: render, composite panel and factory finished trim all sit on the same elevation, and a specification that treats them as one material is how recoats fail early. Ours treats each substrate on its own terms and brings them together at the topcoat.
The work, stage by stage
The six photographs below follow the building through the programme, from the state the survey recorded to the finished coating.
Preparation began with a full wash down of every elevation. Working from a mobile elevated platform, the team pressure washed the render and panels from coping to plinth, killing and stripping the algae along the lower courses with a biocidal wash before rinsing the whole face clean. With the walls clean and dry, the repair list from the survey got worked through in order: hairline cracks in the render were raked out and filled with a flexible filler compatible with the coating system, the handful of blown patches were cut back and made good, and stained sealant joints around the entrance were replaced. Each repair was spot primed so the finished coating would sit on a uniform base, because a deep colour like sargasso blue telegraphs every lazy repair straight through the final coat.
An office building with ribbon glazing is a masking job with some spraying at the end. Both window bands were covered full length in protective film, taped crisp along the frame lines top and bottom, with the entrance doors, canopy, sills and coping line following. Masking is also where overspray control lives: business parks in Buckinghamshire keep cars close to buildings, so we agreed clear bays with the tenants for each phase, screened the working elevation, and checked wind speed every morning before the guns came out. The building stayed occupied throughout. We sequenced the elevations so that no tenant lost natural light for more than a working day at a time, and kept the entrance open on a protected walkway. Coating an empty building is easy. Coating a full one without the tenants writing to the landlord is the actual job, in Milton Keynes or anywhere else in Buckinghamshire.
The coating system ran in three parts: a stabilising primer across the repaired render, an adhesion primer on the composite panels, then two full coats of the pigmented finish in sargasso blue. Render and factory coated panel are different substrates that weather at different rates, and priming each correctly is what lets one topcoat colour sit identically across both. Skip that and the same blue dries to two different sheens on the two materials, which the low winter sun across Buckinghamshire would point out every afternoon. Application was by airless spray in overlapping passes, working each elevation as a single wet edge from one end to the other. Deep blues show roller texture badly, which is why we spray them: the finished film is flat, even and free of lap marks, with a consistent satin sheen from coping to plinth.
The finished office building
The transformation is the kind you stop the car for. The same elevation that faded into the business park now anchors it: two clean bands of glazing floating in deep sargasso blue, pale grey copings and sills drawing the horizontal lines, and the entrance sitting in its canopy like it was always meant to be found. Inside nothing changed, and outside the building moved up a class. Several of the neighbouring owners on the park have asked who did the work, which is the review we value most.
Up close, the junction between coated panel and glazing frame runs straight for the full length of the band, the filled cracks have disappeared under the film, and the sheen is even wherever you stand. The coating is doing quiet work as well as visible work: it has sealed the hairline cracking against the weather, faced the render with a flexible waterproof film, and stopped the panel chalking that was dusting the walkway below. The owner gets a building that photographs well for every letting brochure and needs nothing more than an occasional wash to stay this way. On a multi let office, that maintenance profile matters as much as the colour: a planned wash down keeps the coating performing without scaffold, access disruption or another tenant communication exercise.
Commercial wall coating across Buckinghamshire and the UK
Milton Keynes and the rest of Buckinghamshire have one of the youngest commercial building stocks in the country, which means thousands of rendered and panel walled buildings all reaching the tired stage together. We carry out commercial wall coating in Milton Keynes and across Buckinghamshire, from Aylesbury and Buckingham down to the office parks around High Wycombe, with the same crews covering Bedford, Northampton and Luton in the neighbouring counties.
Beyond that, our national teams apply the identical specification anywhere in the UK. If you own or manage an office building in Buckinghamshire that undersells what happens inside it, book a free site survey: we will inspect the render and panels, photograph the condition, and report on what a recoat in your choice of colour would involve. For the same process on an industrial scale roof, see our case study of a supermarket roof coating near Exeter.
Project completed in spring 2026.
