exterior

Exterior refers to the outer part or surface of something, as opposed to the interior. In architecture and construction, the exterior encompasses all elements visible on the outside of a building, including the facade, exterior walls, roof, windows, doors, and exterior finishes.

Exterior design serves protection, function, and aesthetics. Facades provide weather resistance, energy performance, and stylistic expression. Common materials include brick, stone, stucco, wood siding, vinyl or aluminum siding, fiber cement, metal panels, and concrete.

Finish and color influence durability and curb appeal. Finishes may be painted, sealed, or clad with protective materials. Proper detailing around openings and joints is essential to prevent moisture intrusion.

Maintenance of exterior components includes cleaning, repainting or resealing, inspecting for cracks, addressing water drainage, repairing damaged siding, and ensuring gutters, downspouts, and flashing function correctly. Regular inspection helps protect structural integrity and energy efficiency.

Exterior spaces extend living areas through patios, decks, terraces, and landscaping. Lighting, paving, and plantings are planned for safety, accessibility, and aesthetics, while climate, soils, and local codes guide choices for materials and insulation.

In geometry, exterior refers to the region outside a polygon; the exterior angle is formed by extending a side, and the sum of exterior angles at all vertices is 360 degrees in a convex polygon.