Material Selection for Eco School and Sports Centre - Report Example

Material Selection for Eco School and sports centre Author Name University Name Professor Name Course Name & Number Date of Submission Introduction In constructing in constructing ECO school and sports centre various factors are taken into consideration. The factors that are necessary for ECO School and sports centre relate to sustainability of the materials used, its cost and thermal resistance. The materials should be used easily during construction that is does not require high levels of skills in constructing. The following table provide minimum set standards acceptable for constructing a new facility. element Building regulation Passivehaus recommendations Roof 0.20 W/m2K Wall 0.25W/m2K 0.15W/m2K Floor 0.3W/m2K Windows ,roof windows, curtain Walling and pedestrian door 2.0W/m2K 0.8W/m2K Air permeability 10.00m3/h m2 at 50 pa 1.00m3/h.m2 at 50 Pa In the Eco School and sports centre, the roof is recommended to have thermal resistance of 0.2W/m2K while wall thermal resistance will be 0.25W/m2K and value s for PassiveHaus of 0.15W/m2K. The floor will have thermal resistance of 0.25W/m2K and windows and doors will have 2.0W/m2K. Roof The Eco school will have a roof that is environmentally sustainable that is a roof that is able to absorb greenhouse gasses, retain water, provide insulation and offer habitat to plants and animals. It should be 30° slope and be a wet weight of ±50 kg/m2 thus it is recommended the use of green sedum roof. The green sedum roof will require maintenance thus the school will adapt extensive sedum roof. The following table shows the materials that will be used in the construction Eco School. materials manufacturer Price Thermal conductivity (Wm2K) thickness or dimensions Sedum Plus™ Ma Sedum Green Roof  £225.00 per 5m2. 0.20W/m²K Steel Accord Steel Cladding Ltd £5.64 per m2 0.20W/m²K Standard Z-Purlin Accord Steel Cladding Ltd £5.64 per m2 (175mm x 65mm x 1.6mm) sedum carpet substrate Sedum Green Roof 22.00 per m2 0.20W/m²K Filter Sheet SF (polypropylene) Alumasc Exterior Building Products £10.05 per m2 0.20W/m²K Floradrain FS 25-E drainage layer (recycled polythelyene) Sedum Green Roof £8.95 per sq m.  0.20W/m²K Moisture Mat SSM 45 (Fibre mat with polypropylene carrier) Sedum Green Roof £23.00  0 - 24 sq m. 0.20W/m²K Derbigum Anti-Root waterproofing system Sedum Green Roof 22.00 per m2 0.20W/m²K Derbifoam polyurethane insulation Sedum Green Roof 22.00 per m2 0.20W/m²K. 200mm Vapour barrier(SOPRAVAP’R) Soprema 2.44 m x 39 m The green-roof that will be used in the Eco School is shown in the figure The roofing membrane provides the waterproofing for the roof. As it can be seen its structure is sub-divided in four different layers. A roofing membrane is directly placed on the steel roof decking in order to create a clean and straight surface. The three other layers include: a drainage type of 11mm width, a roof-garden substrate extensive of 40mm to 50mm width and on top a green sedum of 20mm to 30mm width. The selection of the particular eco-friendly type of roofing is considered with care focused on climate and weather conditions of United Kingdom. In case of rainfall a 60-70% percentage of water is absorbed by the plant roots, while the remained amount water is drained by the roof drainage system. Additionally, in order to be the primary parallel steel roof beams connected between them purlins will be used as secondary structural framing. There are 3 types of purlins: the Z purlin or girt, the c section and the eave strut. The c section purlins were chosen for the construction of the secondary structural framing of the roof of the school and gym buildings. The figure below shows the exact dimensions of the purlins. Walls The walls of the eco school and sports centre will have 250mm thick blocks will be used to create a frameless structure, while the internal walls will be built by 100mm blocks. The recommended materials will be AAC blocks since they are strong, durable and easy to use as well as cost effective. mortar will be used to fill the gaps between the blocks while the columns will be done with U AAC lintels filled with reinforced concrete will be used. The beam will be made of steel to have to ability to support the green roof of the school. Over openings such as doors and windows once more AAC U lintels filled with reinforced concrete will be used. There will be no opening longer than 7 metres since this is the maximum span this type of lintel can reach. See view plans for dimensions of openings Hebel high build is suggested to be used for the internal and external coating. This type of render is engineered to be applied onto clean AAC surfaces. The thickness of the coating for the outside surface of the external walls will be 12mm, while the thickness of coating of the inside surface of the external walls will be 4-6mm. The coating of both sides of the internal walls will be 4-6mm thick. Fully meshing of all AAC surfaces is recommended. Alkali resistant glass fibre mesh will be used to assist in maintaining render integrity and minimizing consequential cracking. Meshing will minimize the possibility of cracking significantly, especially at corners of wall openings. The height of the walls for the school will not exceed the 3 metres. See figure below for details. The height of the walls of the gym will reach the 6 metres. At 3 metres height AAC U reinforced lintels will be used instead of ordinary AAC blocks in order to make the walls more stable. Then the construction of the walls will continue again using ordinary AAC blocks. manufacturer Price Thermal conductivity (Wm2K) thickness or dimensions AAC blocks Builders Merchants £14per m2 0.25W/m2K 250mm U AAC lintels Builders Merchants £ 31.50per m2 0.25W/m2K Novacem cement Lafarge Building Materials Inc £25 per bag 0.25W/m2K Course Aggregates Cardigan sand and gravel £ 18.60 per tonne 0.25W/m2K fine aggregate Cardigan sand and gravel £ 14.20 per tonne 0.25W/m2K chemical admixture 0.25W/m2K Sand Cardigan sand and gravel £ 17.60 per tonne 0.25W/m2K Portland cement will be used, but by-products will be mixed to produce concrete that has reduced e CO2 emissions. Some the mixture is a shown below Table 1: Embodied Carbon Dioxide for main constituents of concrete, adapted from The Concrete Centre (2011) Material Embodied CO2 (kg/tonne) Portland cement, CEM I 930 Addition or cement constituent GGBS 52 Fly Ash 4 Limestone 32 Aggregate 4 Floors The floor will be a good insulation this calls for the use of materials that have little heat loss. The materials for intermediate floor are 150mm BISON hollow core floor slab for structural support and quick construction. The top floor must be able to support only the ventilation system that is screed of 10mm, Plywood 18mm, Cellulose Insulation 150mm and Concrete - CEM III/A 100mm (Chudley and Greeno 2013). Outlined below is the specification and cross section of each of the floors. The recommended floor is shown by cross section of the intermediate can be seen in the figure shows manufacturer Price Thermal conductivity (Wm2K) thickness or dimensions 1 Screed 10mm Smet Building Products Ltd £100per m2 0.3W/m2K 10mm 2 Plywood 18mm woodworkers £ 17.50per m2 0.3W/m2K 18mm 3.Cellulose Insulation 150mm Ecowise Insulation Cork Ltd. £2.61per m2 0.3W/m2K 150mm The floor will have concrete made of cement, sand water and gravel. Windows and Doors The Eco School will use Masterdor doors because of their energy efficiency and their compatibility with the wall used to construct the walls. manufacturer Price Thermal conductivity (Wm2K) thickness or dimensions MF90 Sash Windows Repairs £940 1.1 W/m2K 910mm(w) x 2100mm(h) MF66 Sash Windows Repairs £1240 1.1 W/m2K 1820mm(w) x 2100mm(h). Double glazing window - classroom Sheerframe £554 2.0W/m2K Bathroom and cloak window Sheerframe £150 2.0W/m2K Kitchen window Sheerframe £150 2.0W/m2K Gym window Sheerframe £650 2.0W/m2K MF16 is the specified door used for all external front doors in all of the houses. The door is 910mm(w) x 2100mm(h). This door design is a policed preferred specification secured by design. And is a thermal door with an insulated foam core of polyurethane giving a thermal efficiency U-value of 1.1 W/m2K. The doors used throughout the eco-housing are manufactured by Sheerframe (2012), these have been chosen for their ease of fit with ICF tech walls, their energy efficiency and their competitive price. Sheerframe windows use only materials that conform to BS 7619 and BS 7950. All PVC used in these windows is calcium organic stabilised. The specified windows used in the design of the eco-housing are Sheerframe, which boast a U-value of 0.8W/m2K with the use of triple-pane glazing. ICF tech provides a technology called FormCloser designed to seal the core around the window and door openings prior to the concrete being pumped in. It is a recycled PVC extrusion with insulation injected into the core to prevent thermal bridging and retention of concrete during pour. This is used to ensure an air tightness of 0.74m3/m2/hr. References Cardigan sand and gravel. (2012). Price List April 2011/2012. Available from [Accessed 23 March 2013]. Ecowise Insulation Cork Ltd, 2013. Insulate your home with Ecowise Insulation Cork. Available from [Accessed 23 March 2013]. PassiveHouse Builders, 2012. Specialists in the Design & Build of Passive & Energy Efficient Homes. Available from < http://www.passivehousebuilder.com/>[Accessed 23 March 2013]. Roche Group, 2013. Roche Group - Build Technology. Available from [Accessed 23 March 2013]. Sash Windows Repairs, 2013. Window and Door Double Glazing Restoration. Available from< http://sashwindowrepairsdublin.com/doors.php>[Accessed 23 March 2013] Sedum green roof, 2013. Buying a Sedum mat or Module (S.Pod) for a Shed, Garage or Outbuilding [Accessed 23 March 2013]. Sheerframe, 2013. Sheerframe Windows solution beats housing upgrade challenge. Available from < http://www.24dash.com/quickread/housing/2012-11-09-Sheerframe-window-solution-beats-housing-upgrade-challenge>[Accessed 23 March 2013]. TIMCO Wood UK Ltd, 2012. The New generation of Cladding. Available from [Accessed 23 March 2013]. The Concrete Centre, 2013. Building Solutions. Available from http://www.concretecentre.com/technical_information.aspx>[Accessed 23 March 2013]. Read More