Backdrafting

Backdrafting is the reverse flow of gas in the flues of fuel-fired appliances that results in the intrusion of combustion byproducts into the living space. Many fuel-fired water heaters and boilers use household air and lack an induced draft, which makes them especially vulnerable to backdrafting when indoor air pressure becomes unusually low. Inspectors should […]

Anti-Scald Valves

Anti-scald valves, also known as tempering valves and mixing valves, mix cold water in with outgoing hot water so that the hot water that leaves a fixture is not hot enough to scald a person.  Facts and Figures Scalds account for 20% of all burns. More than 2,000 American children are scalded each year, mostly […]

15 Tools Every Homeowner Should Own

The following items are essential tools, but this list is by no means exhaustive. Feel free to ask an InterNACHI inspector during your next inspection about other tools that you might find useful.   1.  Plunger A clogged sink or toilet is one of the most inconvenient household problems that you will face. With a plunger on hand, […]

Basic Waterproofing for Basements

Water Damage Concerns Basements are typically the area of a structure most at risk for water damage because they are located below grade and surrounded by soil.  Soil releases water it has absorbed during rain or when snow melts, and the water can end up in the basement through leaks or cracks.  Water can even […]

Bathroom Ventilation Ducts and Fans

Bathroom ventilation systems are designed to exhaust odors and moist air to the home’s exterior. Typical systems consist of a ceiling fan unit connected to a duct that terminates at the roof. Fan Function    The fan may be controlled in one of several ways: Most are controlled by a conventional wall switch. A timer […]

Attic Pull-Down Ladders

Attic pull-down ladders, also called attic pull-down stairways, are collapsible ladders that are permanently attached to the attic floor. Occupants can use these ladders to access their attics without being required to carry a portable ladder. Common Defects Homeowners, not professional carpenters, usually install attic pull-down ladders. Evidence of this distinction can be observed in consistently […]

Inspecting Aluminum Wiring

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 a branch wiring material. Aluminum will […]

Aluminum Siding Inspection

Aluminum siding is generally in decline as an exterior cladding material because vinyl siding and other materials have become more popular choices. However, it is still among the most common forms of siding found today. It provided many advantages over other materials when it was introduced in the 1940s. It was installed on many affordable homes […]

French Drain Inspection

A French drain is a common means of diverting water from one location on a property to another in order to divert excess rainwater or to dry up soil that is excessively waterlogged, such as land that is located near wetlands. Inspecting French drains is not within the scope of InterNACHI’s Residential Standards of Practice because […]

Daylight Saving Time

Daylight Saving Time (DST), also known as British Summer Time (BST) in the U.K., is the practice of adjusting clocks an hour ahead of Standard Time so that afternoons have more daylight and mornings have less. It is designed to reduce energy consumption in residences and businesses, but its effectiveness is controversial. Interesting DST Paradoxes  In […]