Uninsulated

Uninsulated refers to objects or surfaces that lack insulation material that reduces heat transfer or protects from electric or thermal hazards. The term is commonly applied to building components such as walls, roofs, pipes, and ducts, as well as electrical conductors.

In buildings, uninsulated components allow greater heat loss in winter and heat gain in summer, increasing energy use and costs. They can also lead to surface condensation, dampness, and mold. In cold climates, uninsulated pipes are susceptible to freezing and bursting.

In electrical and mechanical systems, uninsulated conductors or components pose shock or fire risks and are typically covered with protective insulation or sheathing. Standards and codes, such as electrical codes and building codes, require appropriate insulation and barrier materials to reduce hazards.

Insulation materials include fiberglass, mineral wool, foam plastics, elastomeric coatings, or pipe insulation sleeves. The effectiveness is described by R-values or U-factors; higher values indicate better resistance to heat flow. Uninsulated parts have low or zero R-values.

While uninsulated designs may be chosen to save initial cost or for exposure, they usually imply higher energy costs and greater risk in climate or electrical applications.

See also: insulation, energy efficiency.