Devonshire Mansions, Eastbourne

Background

For the perfect example of architectural excellence which not only delivered an impressive aesthetic, significant environmental benefits, and a more robust structural foundation, but also improved thermal performance, look no further than the eight-storey, three-building Building Safety Fund (BSF) project Devonshire Mansions.

Situated in beautiful Eastbourne on the south-east coast of England, Devonshire Mansions were an extremely attractive choice for those wanting stunning sea views and some peace and privacy. However, due to their location in a high exposure area, the buildings were aged and weather-beaten, and required a full overhaul and refurbishment to modernise, align with current safety regulations for high rise buildings, and strengthen the buildings at their core whilst rejuvenating the exterior.

Understanding and appreciating K System’s renowned ability for outstanding refurbishment projects, Pavehall contracted K Systems to completely refurbish this residential development and deliver on the following four primary objectives:

- Remediate unsafe cladding

- Improve the thermal performance rating of each home

- Update and seamlessly replicate existing façade features

- Deliver a solution with acoustic benefits

Our Service

In collaboration with Archiflair Design, Pavehall, and Fullers Plastering, K Systems delivered an industry-leading, insulated façade solution that fulfilled the desired criteria, achieved a U-value of 0.26 W/m²K and resulted in an outstanding architectural structure.

The commitment of K Systems team, their continuous communication, in-depth level of reporting, and consistent presence on site not only ensured a perfect refurbishment, but also instilled 100% confidence in the supply chain throughout, showing exemplary levels of customer service.

This project is a great example of how K Systems overcame various construction challenges to deliver within the agreed time constraints.

The make-up of the façade had multiple protrusions in forms of balconies meaning that every sheathing and insulation board had to be cut to fit. Replicating this without compromising on the strict site deadlines was a challenge but under the great install team and K Systems’ expertise and onsite presence, this was achieved.

Additionally, Devonshire Mansions had a problematic substrate and challenging aesthetic deliverables. Working closely with all partners, and utilising digital technology, K Systems mapped out the refurbishment and specified the ideal solution to Pavehall for implementation.

Technical Project Details

After a comprehensive scoping process, K Systems discovered that the existing system had a drained cavity build up and when removed, the sheathing boards were compromised by water. With the buildings being high rise, steel frame and multi-occupancy, the industry-proven K Systems Exicco Cavity Drainage EWI System was specified.

In the Exicco system, the drained cavity behind the insulation ensures that any interstitial moisture escapes without detriment to the performance of the system. Due to their seafront location, Devonshire Mansions were prone to fierce rain and water exposure, so this system was the ideal choice to ensure any future moisture or condensation build up was allowed out to avoid compromising the substrate or newly installed façade.

Once the strip out of the existing façade had occurred, further challenges were discovered – the substrate was far from line and level. This meant that every rail within the newly installed EWI system had to be packed out using steel shims to create a level vertical façade, subsequently adjusting the specified fixing lengths to suit.

Some elements of the substrate were high strength concrete incorporating a flint aggregate which proved problematic for standard mechanical fixings. Via K Systems’ on site support, a suitable, more bespoke fixing was specified which ensured proper anchoring of rails and intumescent fire barriers. A swift solution was achieved with no detriment to the construction programme.

The newly installed Exicco system was combined with the K Systems M (Mineral Wool) system. This high performing system provides optimal levels of fire resistance and noncombustibility and its installation at Devonshire Mansions meant that the fire classification of the buildings was upgraded to A2-s1,d0 meaning that the development is now compliant with the latest building regulations for all high-rise dwellings in England, further ensuring the safety of residents.

Devonshire Mansions is visually impressive with its feature balconies, architectural cornices, ashlar panelling and quoin detailing. It was a specific requirement of the client to remediate the unsafe cladding without losing these exterior design features.

K Systems created two specifications; one for the elevations and one for the balconies and provided bespoke detailing to allow them to seamlessly harmonise as one façade. Ashlar panelling and quoin detailing was replicated cost-effectively using varying thicknesses of non-combustible mineral wool insulation which was over-rendered skilfully by the contractor using K Systems Silicone Thincoat render.

The more intricate cornice features were all bespoke manufactured using compliant non-combustible materials and integrated into the design with K Systems providing robust detailing to create a water-tight barrier and eliminating cold bridging. Decorative columns were installed at ground level to complete the façade.

The eye-catching, waterfront dwellings were finished with Silkolitt+ - a versatile, easy to apply, water repellent, durable, and low maintenance thin coat render, perfectly paired and formulated for use with our Exicco system

Overall, K Systems specified a fit-for purpose, non-combustible façade with a high level of complex architectural detailing using cost effective solutions. The installation process was overseen by our unrivalled site support team who were frequently on hand to solve any issues as they arose.

“Working alongside K Systems on a project of the size and nature of Devonshire Mansions was a true pleasure. From initial scope and specification to intricate detailing and innovative finishes, the K Systems team lead by example and made the process and delivery a slick and seamless operation. The refurbishment was a complex case but working together in partnership, we all delivered on excellence, and the beautiful Devonshire development is something we can all proudly put our names to.”

James Fuller, Fullers Plastering