by Nick Gromicko, CMI® and Kenton Shepard History Between approximately 1965 and 1973, single-strand (solid) aluminum wiring was sometimes substituted for copper branch-circuit wiring in residential electrical systems due to the sudden escalating price of copper. After a decade of use by homeowners and electricians, inherent weaknesses were discovered in the metal that lead to its disuse as … Read more
Knob-and-Tube wiring (K&T) was an early standardized method of electrical wiring in buildings, in common use in North America from about 1880 to the 1940s. The system is considered obsolete and can be a safety hazard, although some of the fear associated with it is undeserved. InterNACHI inspectors should always disclaim knob-and-tube wiring during their … Read more
What Is Asbestos? Asbestos minerals are made up of fine, durable fibers and are resistant to heat, fire and many chemicals. Asbestos was used in a slew of everyday products, from building materials to fireproof protective gear. It is now widely known that exposure to asbestos can cause mesothelioma, a fatal cancer that affects the lining of the lungs, as well as other cancers and lung-related illnesses.