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| Substructural flooring systems | ||||||||||||||
| floor surfacing | Summary rating | Climate change | Fossil fuel depletion | Ozone depletion | Human toxicity to air | Waste disposal | Water extraction | Acid deposition | Ecotoxicity | Eutrophication | Summer smog | Minerals extraction | Cost £/m2 | Replacement interval (years) |
| Chipboard on timber battens | A | B | B | A | A | A | A | B | A | A | A | A | 20-24 | 30 |
| Deep (500 mm) raised access floor with steel stingers | C | C | C | B | C | C | C | C | B | C | C | C | 38-69 | 30 |
| Shallow (150 mm) raised access floor with steel stingers | C | C | C | B | C | C | C | C | B | C | C | C | 33-64 | 30 |
| Shallow raised flooring system – chipboard on galvanised steel profiled decking | B | B | B | A | A | B | C | B | A | A | B | B | 30-35 | 30 |
| A equals least environmental impact/good environmental performance, with B and C ratings increasing in their environmental impact. | ||||||||||||||
| (Excerpt from Green Guide to Specification) | ||||||||||||||