Building Components

Physical structural elements of a building — walls, roofs, windows, doors, and more. Components track thermal properties (U-values), condition, area, and orientation. They serve as the foundation for Energy Calculations and link to Quotes/Invoices for financial tracking.

Source Files

Layer	Path
Schema	backend/src/db/schema.ts (line ~1010)
Routes	backend/src/routes/building-components.ts, backend/src/routes/component-details.ts
U-value Routes	backend/src/routes/typology-u-values.ts
U-value Calculator	backend/src/lib/u-value-calculator.ts
Components	frontend/src/components/building-components-redesign/ (18 files)
Queries	frontend/src/lib/queries/buildingComponentQueries.ts

Database Tables

Table	Purpose
building_components	Main entity — type, area, U-value, condition, orientation, state
component_details	Sub-elements (individual windows, wall sections) with dimensions
component_quote_links	Links components to Quotes
component_invoice_links	Links components to Invoices

Key Fields — Components

Field	Type	Notes
buildingId	uuid FK	Parent building (cascade)
projectId	uuid FK	Optional — project-scoped planned components
state	enum	Entity state (current building state vs. planned)
componentType	enum	wall, roof, window, door, floor, ceiling, foundation
name	varchar(200)	Display name
surfaceArea	real	m² — manual or calculated from details
surfaceAreaSource	enum	manual or calculated
numberOfComponents	integer	Count of identical components
uValueManual	real	W/(m²K) — thermal transmittance
uValueSource	enum	measurement, typology, regulatory, documented
orientation	enum	north, south, east, west, northeast, etc., horizontal
condition	enum	excellent, good, medium, fair, poor, defective, critical
isPartOfThermalHull	boolean	Whether component is part of heated envelope
isCurrentBuildingState	boolean	Distinguishes actual vs. planned state
sourceComponentId	uuid FK	Self-ref for tracking planned changes from originals
awardedQuoteLineItemId	uuid FK	Links to awarded quote line item

Key Fields — Component Details

Field	Type	Notes
componentId	uuid FK	Parent component (cascade)
width / height	real	Meters (windows/doors)
quantity	integer	Count of identical sub-elements
uwValue	real	Uw value for windows W/(m²K)
surfaceAreaGross / surfaceAreaNet	real	m² gross/net (walls)
insulationThickness	real	cm (walls)

Component Types

Type	Typical Properties
wall	Area, orientation, U-value, insulation thickness
roof	Area, U-value, construction type
window	Width, height, Uw-value, orientation, quantity
door	Width, height, U-value
floor	Area, U-value
ceiling	Area, U-value (top floor ceiling)
foundation	Area, U-value (basement)

Frontend Components

Component	Purpose
ComponentsTableRedesign	Dense table-based UI for all components
ComponentRow / EditableCells	Inline-editable component rows
CategoryGroup	Group components by type
PlannedComponentRows	Display planned (future) components
UValueEditDialog	Edit U-value with source selection
ComponentFieldFilesSection	Attach Files to component fields
AuditLogDialog	View change history per component
ProjectComponentsTable / ProjectComponentsComparisonTable	Project-scoped views with comparison
useComponentsTableActions / useComponentsTableData	State management hooks
useKeyboardNavigation	Keyboard navigation for dense table
componentTableService	Pure logic for table operations

U-Value Reference Data

U-values can be sourced from German building typology:

Source	Path	Purpose
Typology routes	backend/src/routes/typology-u-values.ts	Lookup reference U-values by building type/year
Calculator	backend/src/lib/u-value-calculator.ts	Compute U-values from construction parameters

Relationships

Building Component *──1 Building
Building Component *──1 Project (optional)
Building Component *──1 Building Component (source, self-ref)
Building Component *──1 Building Component (parent, self-ref)
Building Component 1──* Component Details
Building Component *──* Quotes (via component_quote_links)
Building Component *──* Invoices (via component_invoice_links)
Building Component 1──* Scenario Measures
Building Component 1──* Funding Measures

Features

• Dense table UI with inline editing, keyboard navigation, and category grouping
• Current vs. planned state — track original components and project-scoped modifications
• U-value management from multiple sources (measurement, typology, regulatory, documented)
• Component details for sub-elements (individual windows, wall sections by floor)
• Financial linking to Quotes and Invoices via junction tables
• Measure linking to Measures via scenario measures
• Energy impact — U-values and areas feed into Energy Calculations
• Comparison views — before/after across Projects

Related Pages

Buildings | Measures | Quotes | Invoices | Scenarios | Energy Calculations | Scenario Planning | Financial Calculations | Files | Database Architecture