Week 8 Section Detail 15 of the Ormond Theology Centre building
Stramit Roof & Wall Flashing: Architectural detailing, viewed 27 September 2013, at < http://www.roofingwarehouse.com.au /images/Roof%20and%20Wall%20Fl ashing%20Guide.pdf>
This detail highlights a section of wall that includes concrete flooring on one side and a glass roof on the other. One of the more interesting elements of this detail is the connection between the glass roof and the blockwork wall seen in the one to one drawing to the left. An aluminium glazing adaptor has been used, which is helpful when the width requirements of the roof need the structural addition of large spanning members that are separate to the glazing suite. The adaptor and the roof both sit on an aluminium mullion, which also acts as a structural member, and works to carry the dead load of the roof to the building structure. Above these elements there is folded Colorbond overflashing, which runs from underneath the blockwork wall and over the regular folded metal flashing to give extra protection from the effects of rainfall, with the flashing then returning up at the end to form a drip edge as seen in the diagram below left. Also present on the backside of the blockwork wall is sarking. This is a layer of reflective foil laminate that is both an additional barrier to moisture, whilst also acting as a radiative and convective insulation (Timber Building in Australia 2013). The other main structural element of this detail is obviously the concrete floor slab, which helps to hold the blockwork wall in place via wall ties.
In terms of sustainability, there are pros and cons to the materials that have been used. Concrete blockwork has relatively low embodied energy with only 0.67MJ per kg, and 0.073kg of CO2 per kg. The concrete floor slab has slightly higher levels of both, with 1.11MJ energy per kg and 0.159kg CO2 per kg, however concrete posses
Reference Hammond, G.P. and C.I. Jones, 2008, 'Embodied energy and carbon in construction materials', Proc. Viewed 27 September 2013, Instn Civil. Engrs: Energy, in press. Timber building in Australia, 2013, viewed 27 September 2013 at <http://oak.arch.utas.edu.au/tbia/about.asp>
large thermal mass so is able to store energy and release it later. It can also be recycled however cannot be used again for structural elements. Aluminium such as is used for the mullion and glazing adaptor has extremely high embodied energy and carbon footprint at 155MJ energy per kg and 8.24kg CO2 per kg, however is highly recyclable and so most aluminium that is used today is either part or completely made of recycled material. The flashing is made of steel, which has relatively high embodied energy at 20.1MJ energy per kg and 1.37kg CO2 per kg, but again has reasonably strong recyclability potential (Hammond & Jones 2008).