When reading house construction drawings for energy modeling, which plan details should you understand?

• A. Landscaping
• B. HOA restrictions
• C. Wall, floor and roof assemblies
• D. Paint colors

Answer: (C)

Understanding how the building is put together drives energy modeling, because the plan drawings reveal the exact envelope construction: how walls, floors, and roofs are layered, what insulation and air barriers are used, and how those layers join at edges and penetrations. These assemblies determine heat transfer, air leakage, and moisture behavior, which are the inputs used to calculate heating and cooling loads. Landscaping or paint colors can affect shading or aesthetics but they don’t define the envelope details the model relies on. HOA restrictions don’t provide the structural details needed for energy calculations. So the critical plan details to read are the wall, floor, and roof assemblies—the materials, thicknesses, insulation, and air barriers.