Which architectural drawing primarily helps determine insulation levels in a home?

The section view is the architectural drawing that most effectively helps in determining insulation levels within a home. This type of drawing provides a vertical slice through the building, allowing the viewer to see the internal composition of walls, roofs, and floors. It reveals the layers that make up the structure, including where insulation is placed within walls and ceilings.

By examining the section view, a rater can identify not just the presence of insulation but also its thickness and type, which are critical factors for assessing energy efficiency and thermal performance. The section view also illustrates how insulation interacts with other building components and systems, providing a comprehensive understanding of the building’s capacity to maintain temperature and reduce energy consumption.

In contrast, other types of architectural drawings do not provide the same level of detail regarding insulation. Aerial views focus on the layout and position of the building on the site, elevation views give perspective on the building's exterior profile but not its internal details, and floor plans outline room arrangements and dimensions without revealing the vertical elements or systemic insulation configurations. This makes the section view uniquely valuable for analyzing insulation levels.