Defect Map

A defect map is a plan drawing — typically a floor plan, roof plan, or elevation — on which identified defects are marked at their precise locations. It provides a spatial record of the distribution, type, and severity of deterioration across a building or structure, complementing the written condition report with a visual summary that communicates pattern and scale at a glance.

Defect maps are particularly valuable when defects are widespread or recurring — for example, a roof covering with multiple leak points, a concrete frame with systematic carbonation-induced spalling at column bases, or a facade panel system with widespread sealant failure. A written list of locations is difficult to assimilate; a plan with marked defects immediately communicates whether problems are concentrated in one area, distributed uniformly, or following a structural pattern (every column at the same height, suggesting a common exposure condition).

Traditionally, defect maps were produced manually by annotating a reduced-scale copy of the floor plan with hand-drawn symbols and notes. This was time-consuming and required the surveyor to either produce the map on site or work from memory or rough notes back at the office. The risk of positional errors was significant — a defect marked in the wrong bay or at the wrong floor level could result in a contractor attending the wrong location.

Modern practice increasingly uses floor plan software or, more directly, pin-based documentation tools that allow defects to be marked on the floor plan during the site visit itself, at the precise location where they were observed. When combined with 360° photography, each pin on the defect map is linked to a panoramic image from that location, providing both the spatial record and the visual evidence in a single interactive document. This is exactly the workflow that tools like pin360 are designed to support: a pin on the floor plan at each defect location, a 360° photo attached to each pin, and a severity rating that allows the distribution of critical, significant, and minor defects to be read directly from the plan.