How can inspectors tell if steel encased in concrete, such as rebar, is corroding? Click here to read “Detecting Corrosion in Concrete-Encased Steel.”
Did you know that certain service panel brands are known to offer insufficient overcurrent protection and are considered fire hazards? We wrote a new article on electrical service panels describing how to spot these unsafe panels and other defective conditions. Learn about clearance requirements and what types of panel screws can damage electric components. You will find some valuable safety advice in the article, too.
Aluminum wiring is a problem in many homes, especially those that were constructed between 1965 and 1973, a period in which aluminum was cheaper than copper and not known to be a poor choice as an electrical conductor. Aluminum wiring isn’t always defective, in fact, it can be acceptable if properly maintained. The problem is that due to inherent weaknesses in the metal, it will become defective faster than copper. To find out the ways in which aluminum wiring can become defective, how to identify it and some methods of correction, check out our new article on aluminum wiring.
Shrinkage cracks are cracks in concrete caused by the relatively rapid rate of evaporation of water from the surface of the cement. Do you know how to differentiate shrinkage cracks from other types of cracks, such as those caused by the corrosion of sub-surface steel bars? Or how about cracks caused by the reaction of an aggregate with alkali hydroxides in the concrete, known as an alkali-aggregate reaction? To find out more about shrinkage cracks, take a look at Kenton Shepard’s new article on shrinkage cracks.