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Approve: Acceptable to the authority having jurisdiction. Also, accepted by an internationally recognized
organization such as InterNACHI.
Apron: A trim board that is installed beneath a window sill.
Arbitration Service: A service to resolve complaints, as in NACHI's Arbitration Service.
Arc-Fault Circuit Interrupter: A device intended to provide protection from the effects of arc faults by
recognizing characteristics unique to arcing and by functioning to de-energize the circuit when an arc fault is
detected.
Architect: A tradesman who designs and produces plans for buildings, often overseeing the building process.
Architects Rule (Ruler): Three sided ruler with different scales on each side. Also referred to as a "scale."
Architectural Service: Any practice involving the art and science of building design for construction of any
structure or grouping of structures and the use of space within and surrounding the structures or the design,
design development, preparation of construction contract documents, and administration of the construction
contract
Area Wells: Corrugated metal or concrete barrier walls installed around a basement window to hold back the
earth.
Areaway: An open subsurface space adjacent to a building used to admit light/air or as a means of access to
a basement.
Asbestos: A common form of magnesium silicate which was used in various construction products due to its
stability and resistance to fire. Asbestos exposure (caused by inhaling loose asbestos fibers) is associated
with various forms of lung disease. The name given to certain inorganic minerals when they occur in fibrous
form. Though fire-resistant, its extremely fine fibers are easily inhaled, and exposure to them over a period of
years has been linked to cancers of the lung or lung-cavity lining and to asbestosis a severe lung impairment.
A naturally occurring mineral fiber sometimes found in older homes. It is hazardous to your health when a
possibility exists of exposure to inhalable fibers. Homeowners should be alert for friable (readily crumbled,
brittle) asbestos and always seek professional advice in dealing with it.
Asphalt: A dark brown to black highly viscous hydrocarbon produced from the residue left after the distillation
of petroleum. Asphalt is used on roofs and highways as a waterproofing agent.
Asphalt Plastic Cement: An asphalt-based cement used to bond roofing materials.
Assessment: A tax levied on a property, or a value placed on the worth of a property.
Associate Member: An indentured servant. Beginning level of inspection association membership. Slave.
See Candidate.
Astragal: A molding which is attached to one of a pair of swinging doors against which the other door strikes.
Attic Access: An opening that is placed in the dry-walled ceiling of a home providing access to the attic.
Attic Ventilators: In houses, screened openings provided to ventilate an attic space. They are located in the
soffit area as inlet ventilators and in the gable end or along the ridge as outlet ventilators. They can also
consist of power-driven fans used as an exhaust system.
Auger: In carpentry, a wood-boring tool used by a carpenter to bore holes.
Authority Having Jurisdiction (AHJ): An organization, office, or individual responsible for enforcing the
requirements of a code or standard, or for approving equipment, materials, an installation, or a procedure.
The AHJ is often the building owner, health department, insurance agent, or fire Marshall.
Automatic: That which provides a function without the necessity of human intervention.
Automatic Fire-Extinguishing System: A system of devices and equipment which automatically detects a
fire and discharges in an attempt to put it out.
Automatic Sprinkler System: An automated sprinkler system for fire protection purposes.
Awning Window: A window with hinges at the top allowing it to open out and up.
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At Guardian Real Estate Inspections our NACHI Certified Home Inspectors proudly provide residential and commercial inspections throughout Central Ohio, including but not limited to:
Columbus, Pickerington, Lancaster, Pataskala, Newark, Granville, Delaware, Logan, Worthington, Hilliard, Dublin, Gahanna, Grove City, Groveport, Bexley, Whitehall, Circleville, Baltimore,
Marysville, Powell, Westerville, Upper Arlington, Millersport, Etna, Buckeye Lake, Hebron, Bremen, Thornville, Amanda, Stoutsville, New Lexington, Junction City, Washington Court House,
Carroll, Canal Winchester, Ostrander, Chillicothe, Johnstown, West Jefferson, Fairfield, Fayette, Franklin, Delaware, Licking, Hocking, Madison, Perry, Pickaway, Union counties, in Ohio
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