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| CSI Code | Short Description | Extended Description |
| 03500 | Cementitious Decks and Underlayment |
| 03510 | Cementitious Roof Deck | Cementitious Wood Fiber Plank Gypsum Concrete Roof Deck |
| 03520 | Lightweight Concrete Roof Insulation | Composite Concrete and Insulation Lightweight Cellular Concrete Lightweight Insulating Concrete |
| 03530 | Concrete Topping |
| 03540 | Cementitious Underlayment | Gypsum Underlayment Portland Cement Underlayment |
