Sto has supplied the StoTherm Mineral K external wall insulation system with StoLotusan render for the new day case and eye unit building at Chorley and South Ribble Hospital.

Specified by Gilling Dod Architects, and working closely with the main contractor, Tilbury Douglas, the StoTherm Mineral K system combines impressive insulation with excellent fire protection characteristics.  

With an A2-s1, d0 reaction to fire classification in accordance with BS EN 13501-1, the non-combustible mineral fibre insulation is fully bonded to the substrate and therefore no additional firebreaks are required.

Ideal for both new-build and refurbishment projects, its efficient single-leaf construction also means that interior space within the building is maintained.

For this project, the system’s mineral fibre insulation boards were secured to the lightweight steel frame and sheathing board substrate with mechanical fixings, and StoLevell Uni adhesive and levelling mortar.  

A StoLevell Duo Plus reinforcing coat embedded with Sto-Glass Fibre Mesh was then applied to the face of the insulation boards, with StoLotusan and StoSilco renders used for the final finish on different sections of the building, using light colours from Sto’s architectural colour range.

StoLotusan is the only render available that uses Sto’s patented Lotus-Effect technology, which delivers water and dirt repellence and forms a unique surface texture, similar to that of the lotus leaf, that causes the rainwater to run off the render quickly and easily, removing any dirt or dust as it goes.

And, providing resistance to the growth of algae and fungus, the building will retain its looks for many years to come.

“Using different products which are fully integrated with each other provides obvious benefits in terms of efficiency and practicality,” said Vinnie Kershaw of Aire Valley Exteriors, which installed the insulation system.

The new day case and eye unit is the result of a major £17.5m investment in developing enhanced ophthalmology and daycase services.

It now offers an extensive range of diagnostic and treatment facilities for patients with medical eye conditions.