An additional credit is also available if you install a garden water butt. (If there is only balcony space or no private garden area, you get this point automatically.
There are loads of credits here, but they’re not worth much – five Material credits earn you the same as a single Water credit!
Fifteen credits are available by using materials with lower environmental impacts over their life-cycle. The MAT1 Calculator Tool works out the details of how many credits you receive. This is a mandatory section of the Code. This means you won’t achieve Code compliance if you score nothing here, regardless of how well you do elsewhere.
The other nine MAT credits are available if you can show responsible sourcing of materials – Six from the material used to create the building itself, and a further three from windows, staircases, timberworks and furnishings.
If your site is known to be at a low risk of flooding, you can get up to two credits here. A further credit is given if you ensure there is no spill of floodwater from the site for rain storms up to 5mm, and a third if you install a drainage system in according with the SUDS (Sustainable Urban Drainage System) manual.
Some easy credits...
There are some easy credits in this category – up to four are available if the house is fitted with adequate recycling bins, which are collected regularly by the local council. A further credit can be claimed if the house is provided with individual composting facilities.
There must be space outside for waste storage. This is a mandatory section, but doesn’t score you any credits. If you have a Site Waste Management Plan to deal with the waste from the construction works, you could potentially tick off a further three credits.
Global Warming Potential
There are four final credits in this section – one for ensuring all insulation materials have a low GWP (Global Warming Potential) which is based on production, installation and disposal at the end of the dwelling’s life. Proof of low nitrogen oxide emissions will earn you three credits.
The final part of our CSH Simple Summary series coming soon looks at Health & Wellbeing (HEA), Management (MAN) and Ecology (ECO). Here there are some heavily weighted credits...