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Harp Attack
The HARP database allows Building Energy Rating assessors to enter real performance data for heating appliances when calculating Building Energy Ratings rather than low default scores - but few renewable appliances are listed, and the industry appears confused and deterred by the application process. Lenny Antonelli investigates.
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The departure point for the subsequent design, says Roche, was the consultation process with the residents, who would vacate the condemned building and ultimately be re-housed in the new development. “We went through a whole process of what was good about apartment living, what was good about the existing apartments and what was bad about them, and we began to develop a scheme based on single stair access, with two apartments per floor.” The design that emerged delivered a much shallower block, giving vastly improved light and air into living spaces. Reducing the depth of the building also facilitated dual aspect apartments, with bay windows facing the street and glazed balconies overlooking the courtyard to the centre. Dublin City Council sought variety, so there are a total of 17 three-bed, 29 two-bed and 20 one-bed homes, while a large variety of layouts and dwelling types were incorporated into the design. Most of the apartments are either dual or corner aspect, while several even manage dual aspect living spaces. The development also includes a corner retail unit at Mercer Street and York Street, as well as a shared community venue on Mercer Street. In addition to the five blocks which comprise the bulk of the development, the design team chose to not to close off the southern elevation, but instead to construct three lower profile mews-style dwellings. “There are a number of reasons why we went that route.” says Roche. “These structures needed to be low to let the sun in, and we came up with this notion of a brick plinth on the bottom, with a box on top and large gaps in between to let the sun into the garden.”

The demolished flats had substantial gardens to the back; this was one feature the residents were anxious to see retained. Fulfilling that demand, given space restrictions was not easy. The new gardens feature vegetable plots, fruit trees, bird boxes, water features, a children’s play area, communal seating areas, as well as a pergola fronted by two reclaimed Georgian granite doorways, these among the few Georgian features left standing after the forties rebuild. There are also six stainless steel water-butts into which rainwater from down-pipes is fed for use in watering the gardens. The balconies, which overlook this space also act as an extension of the green space. All have been fitted with built-in planters. The garden also houses the central waste pavilion, where residents bring all of their household waste.

The Solarlux sliding glass system allows the balconies to remain fully exposed to the elements or, with the panels fully closed, gives the tenants use of the space during bad weather
The Solarlux sliding glass system allows the balconies to remain fully exposed to the elements or, with the panels fully closed, gives the tenants use of the space during bad weather


Much of the building was prefabricated and assembled onsite. This approach cuts down on onsite waste and facilitates a speedier build, while construction in factory conditions rather than onsite protects against weather damage and delays and mitigates towards higher quality across the board. On the York Street elevation, the design team sought to recapture something of the street’s Georgian heritage. “Brick was very important to the feel of the street,” says Roche, “and important to the residents too, so we wanted to use brick, though in a modern way.” Techrete Group designed, manufactured and erected the architectural precast concrete cladding used to achieve the desired effect. On York Street, the brick-faced panels comprise a 25mm brick slip on a 150mm thick concrete backing panel and incorporate 60mm thick foil faced rigid board insulation. The insulation is fixed directly to the back of the precast panels before they leave the factory. These precast facades, which are non-structural, were then erected onsite. The remaining wall build-up consists of a 100mm cavity, a 75mm stud with rockwool infill, 12.5mm plasterboard and a skim finish.



 

Issue 2, Vol 5 Out Now

Issue 2, Vol 5 out now!
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