Wallscan

Wallscan refers to a set of techniques and devices used to reveal hidden features behind walls without destructive digging or cutting. Used in construction, remodeling, and safety inspections, wall scanning helps identify the location of structural members, electrical wiring, plumbing, insulation, and moisture indicators. The term covers both consumer handheld scanners and professional-grade equipment.

Common methods include magnetic stud finders that detect metal fasteners, capacitance-based scanners that sense changes in wall density, and radar-based devices that emit low-power radio waves to image behind wall surfaces. Infrared thermography can reveal temperature anomalies associated with moisture or insulation gaps. Some systems combine multiple sensors to improve reliability and reduce false readings.

Wall scans guide safe drilling, hanging, and retrofits, and are widely used by builders, electricians, remodelers, and energy auditors. They are also used in historical preservation and insurance assessments. Limitations include interference from metal lath, pipes, or thick or composite walls, and the possibility of inaccurate readings. Scans should be corroborated with other methods before cutting or penetrating walls.

WallScan is also the name of consumer products marketed under brands such as Zircon that offer light-duty wall-scanning capabilities for hobbyists and professionals.