# Enclosure ### Enclosure Quantity Takeoffs The building enclosure is divided into three components: solid exterior wall, transparent exterior wall, and roofing. The area of each is calculated based on user inputs for building floor area, number of floors, floor-to-floor height, window-to-wall ratio (WWR), and building perimeter. C.Scale makes a preliminary estimate of floor-to-floor height, WWR, and building perimeter (assuming a square building), which the user can refine in the "overrides" panel in the base case tab. $$ Enclosure \ area = Perimeter \ \* \ F2F \ Height \ \* \ Number \ of \ floors $$ $$ Transparent \ Exterior \ Wall \ area = WWR \ \* \ Perimeter \ \* \ F2F \ Height \ \* \ Number \ of \ floors $$ $$ Solid \ Exterior \ Wall \ area = (1-WWR) \ \* \ Perimeter \ \* \ F2F \ Height \ \* \ Number \ of \ floors $$ $$ Roof \ area = Building \ Footprint $$ #### Floor-to-Floor Height Floor-to-floor (F2F) height can be set for each floor individually (if using the stacked `BuildingForm` object) or for all floors together (in the simple `BuildingForm` object). Default values are set by use type, as described in the table below. | Use Categories | Default F2F Height (ft) | Default F2F Height (m) | | ------------------------------------------------------------------------------------------------------------------------------ | ----------------------- | ---------------------- | | Dormitory, Hotel, Multifamily Housing, Senior Care Facility, Single Family Home | 11.5 feet | 3.5 meters | | Fitness Center, K-12 School, Medical Clinic, Office, Pre-school / Day Care, Restaurant, Retail Store, University/College | 13 feet | 4.0 meters | | Aquarium, Hospital, Laboratory, Library, Museum, Performing Arts, Post Office, Stadium, Transit Station, Worship Facility, Zoo | 15 feet | 4.6 meters | | Convention Center | 18 feet | 5.5 meters | | Distribution Center, Warehouse | 20 feet | 6.1 meters | ### Enclosure Assemblies All enclosure components are modeled on an area basis. In both editing modes, C.Scale populates a full material inventory for each assembly based on user selections. Assembly quantities are based on industry guidance and standard North American construction practice. Detailed assembly descriptions and reference specification language are available in detailed view. #### **Simple Editing View** In the simple editing view, users select a general type for each enclosure category — a cladding type for the solid exterior wall, a system type for the transparent exterior wall, and a membrane type for roofing. C.Scale then generates a complete schematic material inventory for each assembly. #### **Detailed Editing View** In the detailed editing view, users can configure each enclosure assembly layer by layer. C.Scale generates a full material inventory based on those selections, which users can then convert to a user-described assembly and further customize by editing individual materials — adjusting material selection or quantity — using C.Scale's library of over 150 generic enclosure materials. Assemblies can be renamed and saved to the project scenario. The configurable layers for each enclosure component are: #### Solid Exterior Wall {% tabs %} {% tab title="Finish Assemblies" %} **Cladding assemblies available:** * Brick Masonry * Cement Stucco * Composite Metal Panel Rainscreen * EIFS * Fiber Cement Rainscreen * Formed Steel Panel Rainscreen * Glass Fiber Reinforced Concrete (GFRC) Rainscreen * Stone Veneer Rainscreen * Terracotta Rainscreen * Thin Brick Masonry Veneer * Thin Brick Rainscreen * Wood Rainscreen * Paint on structure {% endtab %} {% tab title="Exterior Insulation" %} **Exterior insulation types available:** * Polyisocyanurate (PIR) * Expanded polystyrene (EPS) * Extruded polystyrene (XPS) * Fiberglass Banket * Mineral wool, high-density * Mineral wool, low-density {% endtab %} {% tab title="Wall Framing" %} **Wall framing types available:** * CMU Wall, 6" (152 mm) * Metal Stud, 3 5/8" (92 mm), 16" (400 mm) o.c. * Metal Stud, 3 5/8" (92 mm), 24" (600 mm) o.c. * Metal Stud, 6" (152 mm), 16" (400 mm) o.c. * Metal Stud, 6" (152 mm), 24" (600 mm) o.c. * Wood Stud, 2 x 4 (38 x 89 mm), 16" (400 mm) o.c. * Wood Stud, 2 x 4 (38 x 89 mm), 24" (600 mm) o.c. * Wood Stud, 2 x 6 (38 x 140 mm), 16" (400 mm) o.c. * Wood Stud, 2 x 6 (38 x 140 mm), 24" (600 mm) o.c. {% endtab %} {% endtabs %} ### Transparent Exterior Wall {% tabs %} {% tab title="Glazing Type" %} **Glazing types available:** * Punched windows * Curtainwall
{% endtab %} {% tab title="Mullion/Frame Material" %} **Mullion/frame types available via app:** * Steel * Aluminum * Wood * Wood/Aluminum * Glulam {% endtab %} {% tab title="Insulated Glazing Unit (IGU)" %} **IGU types available via app:** * Double-glazed IGU * Triple-glazed IGU * Closed Cavity Facade {% endtab %} {% endtabs %} ### Roofing {% tabs %} {% tab title="Roofing Type" %} **Roofing types available:** * Standing Seam Metal Roofing * Built-Up Roofing (BUR) * APP Modified Bitumen Roofing * SBS Modified Bitumen Roofing * Adhered Single-Ply EPDM Roofing * Ballasted Single-Ply EPDM Roofing * Single-Ply TPO Roofing * PVC Membrane Roofing * Asphalt Shingles * Clay Tile * Natural Slate Tile * Synthetic Slate Tile {% endtab %} {% tab title="Cover Board" %} **Cover board types available:** * Polyiso high-density roof coverboard * Glass-mat gypsum board, 1/2 in * Glass-mat gypsum board, 5/8 in * Plywood, 1/2 in {% endtab %} {% tab title="Insulation" %} **Exterior insulation types available:** * Polyisocyanurate (PIR) * Expanded polystyrene (EPS) * Extruded polystyrene (XPS) * Fiberglass * Mineral wool {% endtab %} {% endtabs %} The C.Scale enclosure model uses Payette Kaleidoscope takeoffs data for some assemblies by permission. Find the full citation for these data in the [Reference Data](/the-c.scale-tm-data-model/reference-data.md) section of the methodology. ### **Default Insulating Values** The declared R-value of the assembly is used to calculate the amount of exterior insulation required. R-values for framing assemblies are de-rated following ASHRAE 90.1-2019 Appendix A. If no R-value is declared, the default is set by climate zone. These defaults can be overridden in the detailed editing view.
ASHRAE Climate ZoneEnclosure R-Value DefaultRoofing R-Value Default
Climate Zone 01830
Climate Zone 11830
Climate Zone 21830
Climate Zone 32030
Climate Zone 42133
Climate Zone 52133
Climate Zone 62636
Climate Zone 72641
Climate Zone 82941
### **Enclosure Materials** For each assembly, C.Scale calculates material quantities per unit of assembly area. C.Scale automatically multiplies these per-area quantities by the total assembly area to produce a consistent material inventory for the project. This allows models to be updated easily as takeoffs evolve throughout the design process. Generic materials are based on North American industry-average EPDs wherever available, and are reported per the declared unit of the relevant Product Category Rule (PCR) to support material substitution and comparison with product-specific EPDs within a category. ### **Updates and Improvements** > **Coming soon:** C.Scale is actively expanding its transparent wall assembly library to include a broader range of glazing system types, including storefronts, glazed entrances, window walls, and curtainwall variants. These additions will allow for more precise carbon accounting across the full range of building envelope glazing assemblies. Don't see an assembly or material you need? [Reach out to our team](mailto:hi@cscale.io) — we're continually expanding our enclosure library and welcome requests. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.cscale.io/the-c.scale-tm-data-model/whole-life-carbon/enclosure.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.