An abseil cleaning and cladding cleaning project- the cladding at the University of South Wales (based in Treforest, Pontypridd) was in need of cleaning and restoration. The building had become contaminated with red algae, Trentopohlia, which is more complex than single cell green algae. The carotenoid content of the algae gives its biofilm a distinct orange/red hue, and this cannot be removed by traditional cleaning methods. A biocidal treatment is needed to kill the algae and remove the red staining. The University of Wales building is also relatively large – approximately 5 storeys. This height also poses technical challenges when considering cleaning the building exterior. 

University of South Wales

The University of South Wales is the 35th largest university in the UK – in terms of student numbers. It traces its origins back to the year 1841- when the Newport Mechanics institute was formed. Over the years this technical institute evolved to become Wales’ second largest university. The university offers in excess of 500 courses, and the ex Archbishop of Canterbury- Rowan Williams, has served as its chancellor – having been appointed in 2014. 

The university plays an integral role in higher education both locally and nationally. As such it is important, for perception’s sake, and the morale of students and staff alike, that the campus buildings are well maintained to reflect their prestige.

Red Algae

Algae is one of the oldest life-forms on the planet. It photosynthesises vigorously in many environments – and can establish itself on both organic and non-organic substrates. Trentopoholia – which can be identified on buildings due to its distinctive red characteristics, is a more complex organism than single cell green algae. Its cellular complexity makes it harder to remove than single cell green algae. Trentopohlia also creates symbiotic associations with fungus mycelium and lichens. So if left untreated fungus and lichen will also grow on a building contaminated with red algae.

Working At Height

Sofwashing UK are skilled at surveying buildings to establish the best methods of working at height. As a 5 storey building it was clear that specialist access equipment would be needed to clean the University of South Wales Campus.

Rather than use heavy plant, and specialist MEWPs, to access the higher elevations, the sheer drop and good quality anchoring points made abseil cleaning a more productive option. 

Using a two man team abseiling down the same elevation line simultaneously Softwashing UK were able to apply a biocide to kill the algae and burst its cells, and steam and a brush to remove both the algae, and the staining it causes. The lower reaches of the building were easier to clean, using extendable poles.

As you can see from the video the results of this technically challenging project were very impressive- and the buildings were restored to an ‘as new condition’ that reflects their esteem and prestige.