56 EXTERNAL ENVELOPE Textured corten EWI
Today’s EWI systems can be used to mimic a range of ‘texture’ designs, decorative surfaces and textured coatings with high aesthetic value for contemporary, unique and entirely customised projects
Self-cleaning technology An example of the self-cleaning abilities of insulated render, the 193-bed Holiday Inn Express hotel at Aberdeen Airport specified a silicone option that would not only look stunning but be highly durable. Architects White Ink and the client wanted the building to retain its fresh, sharp and attractive aesthetic. Aberdeen experiences extreme weather conditions, and the hotel is very exposed to the elements. It is also in close proximity to the airport, with all the associated pollution, so the ability to self- clean was an important design requirement. The silicone allows rainwater to bead on the surface and then run down, taking dirt and grime that would otherwise attach itself to the damp face of the building, with it. The silicone insulated render was also awarded certification from the Fraunhofer Institut fur Bauphysik in Germany for algae and fungus-resistant coatings.
Bold in black To deliver a cost-effective, visually striking and energy-efficient facade for a 245-bed, four-storey hotel at Gatwick Airport’s south terminal, architects Scott Brownrigg specified insulated render in a bold black. A mineral wool insulated render system created a first-class thermal fabric for the walls of the hotel. While the surface was still wet, a tailored alkali-resistant, woven glass fibre mesh was bedded in, before being coated with another layer of mortar and finished off with a trowel-applied continuous layer of silicate coating and a black acrylic top coat for a luxurious look. As a result of the render’s specification, heat does not escape from the walls in winter, and solar gain is minimised in the summer, creating a comfortable environment for hotel guests. The cold pigment finish allows darker colours to reflect heat rather than absorb it.
EWI replicating rainscreen cladding
Bloc Hotel
A desire to achieve a striking rainscreen cladding ‘look’ on a reduced budget at Fabrick House in Cheadle saw a novel EWI approach deployed. The dilapidated 1960s office block, undergoing a conversion into a modern apartment building, saw an insulated render system installed but with textured finishes to replicate a rainscreen cladding aesthetic.
Aberdeen Holiday Inn Express
Clean blue and white tones and a dark banding effect achieved the desired visual impact, while simultaneously meeting current U-values for the external walls.
WWW.ARCHITECTSDATAFILE.CO.UK
Opting for an EWI system rather than a bespoke rainscreen panel system reduced the programme timeline, while also mitigating any risk around external cavities; including potential for moisture ingress over the longer term. The proximity of the West Coast mainline, only 20 metres from the building, meant high acoustic values would be key to comfortable living and these were achieved alongside all standard regulatory requirements. The system achieves A2-s1 d0 fire rating and therefore complies with Building Regulations for buildings over 18 metres in height.
EWI/brick slip combinations Architects can ‘dream big and dream bold’ with EWI and brick slip solutions, which offer versatility, adaptability and cost effectiveness where insulated render is combined with clay, lightweight, stone and ceramic slips for example.
EWI can be combined with a range of brick slip solutions to realise bespoke brick slip design with scale and scope rather than watering down architectural aspiration due to cost parameters. Facade specialists well versed in Modern Methods of Construction can advise on weight and support systems, through to the cost efficiency that EWI and brick slip solutions can offer. A combination of EWI and clay slips were deployed at St Vincent’s, a modern, six-storey student accommodation block in Sheffield. The design by HCD Architects required a system that had to be flexible enough to accommodate a stepped feature to the masonry facade. A solution using EWI and two thicknesses of clay slips – 15 mm and 25 mm – created a stepped detail in line with the architect’s design intent.
Delivery of the works had to take into account the proximity of neighbouring 19th Century, Grade-II Listed St Vincent’s Church which has been fully refurbished as a communal student facility within the overall site development.
The project was highly commended in
the Architectural Design category at the 2019 Insulated Render and Cladding Association Awards. The judges were particularly impressed because they felt that it set a good example for the future of EWI. They also recognised the challenges that can occur when working so closely to a listed building.
James Ormerod is managing director at Aliva UK
ADF JANUARY 2021
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76
