Construction materials have an environmental impact over their life cycle whether it be from transportation to site or embodied energy within a product.
The Building Research Establishment introduced its Environmental Assessment Method known as BREEAM in 1990 with the aim that the guidance offered will reduce the negative impact of buildings on the environment With this in mind Ash & Lacy believe our AshZip product can not only offer a cost effective roofing solution but also have a positive environmental impact on the overall building solution.
In accordance with the green guide to specification an AshZip roof would be considered to have a summary rating of A. This is based on a range of environmental impact issues such as climate change, fossil fuel depletion, ozone depletion etc. Along with this an AshZip system would be considered as having a low cost per m2 compared to other systems therefore offering a good balance between cost to the environment and cost to the end client.
Several Breeam credits are available to the building designer when using an Ashzip system.
Typically these are:-
- Specification of insulants to avoid the use of Ozone depleting substances during manufacture and in final composition = 1 credit.
- Insulants within our standard AshZip specifications match this criteria whether it be our standard glass fibre insulation or mineral wool acoustic slabs. Reuse of > 80% of structure by building volume = 1 point
- Whilst the roof does not normally represent 80% of the volume of the building the Ashzip system can contribute a significant amount of material at the end of the building life cycle At least 80% by area of roof specifications achieve and A summary rating in the Green Guide to Specification = 1 point
- This should be easily achievable by using AshZip evenwhen a 10% rooflight area is required on the design. Use of recycled aggregate or Masonary in structure = 1 point
- Whilst not used in standard Ashzip constructions this can be considered when used in the substrate/growing medium for green roofs and or Brown roofs in urban environments such as reducing heat island effects and helping reduce the risk of flashing flooding by holding water rather than it running straight off the roof into the drainage system.
- No use of Asbestos = 1 point
None of the AshZip systems contain Asbestos. There are other ‘bolt on’ products available through the Ashure supply chain partners which can gain further points such as Solar photovoltaics, solatubes, solar heating systems and grey water recycling systems.
Further details of these are available from our technical department along with comprehensive technical back up from our product partners.
The amount of CO2 emissions contributed to the carbon footprint of a building by delivery of materials to site can be reduced through actually producing the roofing materials on site. Depending upon the size of the project this can not only reduce the carbon footprint but also cost of transportation.
For example, on a 5000m2 project where would send the container to site to roll, we would use one articulated vehicle to send the rollformer and power generator to site. If we assume the site is 200 miles away the CO2 for transporting the production equipment to site would be 268g per mile x 200 = 536kg of CO2. To manufacture in the factory and transport to site would require 4 lorry loads and therefore the CO2 emissions of the lorry would be 2144kg.
From a simple calculation it can be seen that CO2 emissions can be drastically reduced by site production.
*All calculations are estimates to provide an example only. For further information please contact our AshZip technical department.