Surfaces

I don't think a gravel driveway is considered pervious, unless it is specifically engineered and maintained to be so. Typically gravel gets packed hard in road situations and is pretty much impervious. You would need to include it in your SRI calcs, or use one of the other sustainability criteria (shading?).

Hi, Would gravel landscape areas ( see picture http://goo.gl/PSkAX ) be considered as pervious areas? No cars run over it, so it doesn't get packed hard. In LEED Interpretation # 10113 the Ruling says "Aggregate and chat areas must be considered hardscape, and would count as open-grid pavement systems, for the purposes of this credit". Does this mean that we could avoid getting an SRI value for this material since its over 50% pervious? In Mexico, where the project is located, SRI testings are very rare and expensive.

Nadia,I would guess that GBCI will ask for an SRI for this space unless you can prove it is 50% pervious.

Thanks Emily!