A late design decision left structural steel exposed as an architectural feature within the Devonshire House office refurbishment.
The accepted project information identified a 120-minute fire-resistance requirement for the relevant steelwork, together with a black decorative finish.
The coating package was introduced at short notice while the wider refurbishment was already progressing.
Preparation and application therefore had to be completed out of hours, with coated areas protected before daytime trades returned.
Our scope covered mechanical preparation of the exposed steel, application of Manor QD Phosphate HB420 primer, application of the project-specified Thermoguard intumescent coating and installation of the specified black decorative topcoat.
Temporary barriers were used to protect freshly coated areas between shifts.
Loose and unsound material, together with residual mill scale, was removed by mechanical abrasion.
Manor QD Phosphate HB420 was then applied before the project-specified Thermoguard intumescent coating. A black decorative topcoat completed the exposed architectural finish.
The exact intumescent product should only be added after it has been checked against the accepted 120-minute coating schedule.
The work was sequenced across five night shifts, with freshly coated areas protected before the site returned to normal daytime activity.
The package was completed across five night shifts within the refurbishment programme.
The finished steelwork was left with a uniform black appearance that complemented the exposed structural design.
The photographs show the steel during the out-of-hours coating programme and after completion of the black decorative finish.
Send us the available fire strategy, steel details and finish requirements. We can review the scope and advise on preparation, coating selection and on-site application.
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