Some question about roof garden.

I have a hotel project in china. Our client will build a roof garden. Some areas of roof garden is vegetated roof, and other area will be construct as lane, tennis court or other things. These areas are paved by wood, pebble,tiles instead of traditional roof material(paints, concrete etc.). Can we treat these parts as vegetated roof? As reference guideline, occupants` use of roof gardens may be incompatible with high-reflectivity roofing materials. An area-weighted SRI equivalent may help allow for low-glare pavers where people congregate. Is that means, an equivalent SRI for these parts by material color is more acceptable? If we equivalent SRI for this parts, is it acceptable i upload a test report or cut sheets of the equivalent material? (For example, if i have a pavement constructed by green tiles, and we know the SRI of green paints is 21, can we submit the SRI of green tiles as 21?)