Windsor Court’s SIGA Slate roof, with its hips, valleys and dormers helps to minimise the building’s scale and mass in this sensitive urban context.
Located on Lansdown Crescent, the care home is surrounded by residential buildings and is opposite a Victorian terrace of distinguished Italianate-style homes.
These feature white render walls punctuated by tall, narrow sash and casement windows set beneath distinctive low pitched slate roofs with characteristic deep overhanging eaves.
The Design Collective Architects’ thoughtful response to the care home’s design is focused on a palette of materials which reflect historic and vernacular materials used in the locale.
The architect’s design draws heavily on the Italianate detailing that is a feature of the Crescent. In particular, the hipped slate roof, bracketed eaves details and chimney stacks.
However, because the care home measures 16m front-to-back, the building is significantly deeper than the residential properties it is trying to imitate. “In order to maintain the building’s domestic scale appearance, we had to slice off the ridge from the roof, which we infilled with a small area of flat roof hidden from the street,” says Richard Bailey, director of The Design Collective Architects. The addition of hips, valleys and dormers also help to break up the mass of the roof further. These interventions worked and the slate roof fits well with those of neighbours.
In addition to being a good colour match, SIGA 39 slates are also “First Selection”. That means they are the best quality slates from that quarry, as such they have a very consistent quality which was important in achieving a quality finish for this project.
Slate is a lump of rock split into individual sheets, which are then cut into slates. Being a natural product, inferior quality variations can occur in the thickness of individual slates. This can be a problem if slates of different thicknesses are laid next to each other in the same row because there will be a gap when the course of slates is laid above. This looks unattractive and it could also be a weak spot for wind-driven rain or wind uplift.
To overcome this problem with inferior quality slates, a good slater would normally sort the slates into batches so that they can be laid with slates of equal thickness in each row. However, by using top of the range, first selection SIGA 39 slates, White Roofing Services spent far less time grading and sorting to produce a good-looking finished roof.
