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NACHI's
Standards of Practice
Table
of Contents
1.
Definitions and Scope.
2.
Standards of Practice
2.1.
Roof
2.2. Exterior
2.3. Basement, Foundation, Crawlspace & Structure
2.4. Heating
2.5. Cooling
2.6. Plumbing
2.7. Electrical
2.8. Fireplace
2.9. Attic & Insulation
2.10. Doors, Windows & Interior
3.
Limitations, Exceptions & Exclusions
4.
Glossary of Terms
1.
Definitions and Scope
1.1.
A Home inspection is a non-invasive visual examination of a residential
dwelling, performed for a fee, which is designed to identify observed
material defects within specific components of said dwelling.
Components may include any combination of mechanical, structural,
electrical, plumbing, or other essential systems or portions of
the home, as identified and agreed to by the Client and Inspector,
prior to or during the inspection process.
I.
A home inspection is intended to assist in evaluation of the
overall condition of the dwelling. The inspection is based on
observation of the visible and apparent condition of the structure
and its components on the date of the inspection and not the
determination of future conditions.
II.
A home inspection will not reveal every problem that exists
or ever could exist, but only those material defects observed
on the day of the inspection.
1.2.
A Material defect is a problem with a residential real property
or any portion of it that would have a significant adverse impact
on the value of the property or that involves an unreasonable
risk to people on the property. The fact that a structural element,
system or subsystem is near, at or beyond the end of the normal
useful life of such a structural element, system or subsystem
is not by itself a material defect.
1.3.
An Inspection report shall describe and identify in written format
the inspected systems, structures, and components of the dwelling
and shall identify material defects observed. Inspection reports
may contain recommendations regarding conditions reported or recommendations
for correction, monitoring or further evaluation by professionals.
2.
Standards of Practice
2.1.
Roof
I.
The inspector shall inspect from ground level or eaves:
A.
The roof covering.
B. The gutters.
C. The downspouts.
D. The vents, flashings, skylights, chimney and other roof
penetrations.
E. The general structure of the roof from the readily accessible
panels, doors or stairs.
II.
The inspector is not required to:
A.
Walk on any roof surface.
B. Predict the service life expectancy.
C. Inspect underground downspout diverter drainage pipes.
D. Remove snow, ice, debris or other conditions that prohibit
the observation of the roof surfaces.
E. Inspect antennae, lightning arresters, or similar attachments.
2.2.
Exterior
I.
The inspector shall inspect:
A.
The flashing and trim.
B. All exterior doors, decks, stoops, steps, stairs, porches,
railings, eaves, soffits, fascias, grading, and walkways.
C. And report as in need of repair any spacings between intermediate
balusters, spindles, or rails for steps, stairways, balconies,
and railings that permit the passage of an object greater
than four inches in diameter.
D. The vegetation, surface drainage and retaining walls when
these are likely to adversely affect the building.
E. And describe the exterior wall covering.
II.
The inspector is not required to:
A.
Inspect or operate screens, storm windows, shutters, awnings,
fences, outbuildings, or exterior accent lighting.
B. Inspect items, including window and door flashings, which
are not visible or readily accessible from the ground.
C. Inspect geological, geotechnical, or hydrological conditions.
D. Inspect recreational facilities.
E. Inspect seawalls, break-walls and docks.
F. Inspect erosion control and earth stabilization measures.
G. Inspect for safety type glass.
H. Inspect underground utilities.
I. Inspect underground items.
J. Inspect wells or springs.
K. Inspect solar systems.
L. Inspect swimming pools or spas.
M. Inspect septic systems or cesspools.
N. Inspect playground equipment.
O. Inspect sprinkler systems.
P. Inspect drain fields or drywells.
Q. Determine the integrity of the thermal window seals or
damaged glass.
2.3.
Basement, Foundation & Crawlspace
I.
The inspector shall inspect:
A.
The basement.
B. The foundation
C. The crawlspace.
D. The visible structural components.
E. Any present conditions or indications of active water penetration
by probing a representative sampling of structural components
where deterioration is believed to be present or where clear
indications of deterioration are present.
F. And report any general indications of foundation movement
that are observed, such as but not limited to sheetrock cracks,
brick cracks, out-of-square door frames or floor slopes.
II.
The inspector is not required to:
A.
Enter any crawlspaces that are not readily accessible or where
entry could cause damage or pose a hazard to the inspector
in his or her opinion.
B. Move stored items or debris.
C. Operate sump pumps with inaccessible floats.
D. Identify size, spacing, span, location or adequacy of foundation
bolting, bracing, joists or support systems.
E. Provide any engineering or architectural service.
F. Report on the adequacy of any structural system or component.
2.4. Heating
I.
The inspector shall inspect:
A.
The heating system and describe the energy source and heating
method using normal operating controls.
B. And report as in need of repair electric furnaces which
do not operate.
C. And report if inspector deemed the furnace inaccessible.
II.
The inspector is not required to:
A.
Inspect or evaluate interiors of flues or chimneys, fire chambers,
the heat exchanger, the humidifier or dehumidifier, the electronic
air filter, solar heating systems or fuel tanks.
B. Inspect underground fuel tanks.
C. Determine the uniformity, temperature, flow, balance, distribution,
size, capacity, BTU, or supply adequacy of the heating system.
D. Light pilot flames.
E. Activate heating, heat pump systems, or other heating systems
when ambient temperatures or other circumstances are not conducive
to safe operation or may damage the equipment.
F. Operate electronic thermostats.
G. Evaluate fuel quality.
2.5.
Cooling
I.
The inspector shall inspect:
A.
The central cooling equipment using normal operating controls.
II.
The inspector is not required to:
A.
Determine the uniformity, temperature, flow, balance, distribution,
size, capacity, BTU, or supply adequacy of the cooling system.
B. Inspect window units, through-wall units, or electronic
air filters.
C. Operate equipment or systems if exterior temperature is
below 60 degrees Fahrenheit or when other circumstances are
not conducive to safe operation or may damage the equipment.
D. Inspect or determine thermostat calibration, heat anticipation
or automatic setbacks or clocks.
E. Examine electrical current, coolant fluids or gasses, or
coolant leakage.
2.6.
Plumbing
I.
The inspector shall:
A.
Inspect the main water shut off valve.
B. Inspect the water heating equipment, including combustion
air, venting, connections, energy sources, seismic bracing,
and verify the presence or absence of temperature-pressure
relief valves and/or Watts 210 valves.
C. Flush toilets.
D. Run water in sinks, tubs, and showers.
E. Inspect the interior water supply including all fixtures
and faucets.
F. Inspect the drain, waste and vent systems, including all
fixtures.
G. Describe any visible fuel storage systems.
H. Inspect the drainage sump pumps testing sumps with accessible
floats.
I. Inspect and describe the water supply, drain, waste and
main fuel shut-off valves, as well as the location of the
water main and main fuel shut-off valves.
J. Inspect and determine if the water supply is public or
private.
K. Inspect and report as in need of repair deficiencies in
the water supply by viewing the functional flow in two fixtures
operated simultaneously.
L. Inspect and report as in need of repair deficiencies in
installation and identification of hot and cold faucets.
M. Inspect and report as in need of repair mechanical drain-stops
that are missing or do not operate if installed in sinks,
lavatories and tubs.
N. Inspect and report as in need of repair commodes that have
cracks in the ceramic material, are improperly mounted on
the floor, leak, or have tank components which do not operate.
II.
The inspector is not required to:
A.
Light pilot flames.
B. Determine the size, temperature, age, life expectancy or
adequacy of the water heater.
C. Inspect interiors of flues or chimneys, water softening
or filtering systems, well pumps or tanks, safety or shut-of
valves, floor drains or sprinkler systems.
D. Determine the exact flow rate, volume, pressure, temperature,
or adequacy of the water supply.
E. Determine the water quality or potability or the reliability
of the water supply or source.
F. Open closed plumbing access panels.
G. Inspect clothes washing machine connections.
H. Operate any main, branch or fixture valve except fixture
faucets and hose faucets attached to the building.
I. Test shower pans, tub and shower surrounds or enclosures
for leakage.
J. Evaluate the compliance with local or state conservation
or energy standards, or the proper design or sizing of any
water, waste or venting components, fixtures or piping.
K. Determine the effectiveness of anti-siphon, back-flow prevention
or drain-stop devices.
L. Determine whether there are sufficient clean-outs for effective
cleaning of drains.
M. Evaluate gas, liquid propane or oil storage tanks.
N. Excavate or otherwise uncover the private sewage system
or its components to determine size, adequacy or efficiency.
O. Inspect water treatment systems or water filters.
P. Inspect pressure pumps or bladder tanks.
Q.
Evaluate time to obtain hot water at fixtures, or perform
testing of any kind to water heater elements.
R.
Evaluate or determine the adequacy of combustion air.
S.
Test, operate, open or close Watts 210 valves and/or TPR
valves.
T.
Examine ancillary systems or components, such as, but not
limited to, those relating to solar water heating, hot water
circulation.
2.7.
Electrical
I.
The inspector shall inspect:
A.
The service line.
B. The meter box.
C. The main disconnect.
D. And determine the service amperage.
E. Panels, breakers and fuses.
F. The grounding.
G. The bonding.
H. A representative sampling of switches, receptacles, light
fixtures, and test all GFCI receptacles and GFCI circuit breakers
observed and deemed to be GFCI's during the inspection.
I.
And report the presence of solid conductor aluminum branch
circuit wiring if readily visible.
J. And report on any GFCI-tested receptacles in which power
is not present, polarity is incorrect, the receptacle is not
grounded, is not secured to the wall, the cover is not in
place, the ground fault circuit interrupter devices are not
properly installed or do not operate properly, or evidence
of arcing or excessive heat is present.
K. The service entrance conductors and the condition
of their sheathing.
L. The ground fault circuit interrupters with a GFCI tester.
M. And describe the amperage rating of the service.
N. And report the absence of smoke detectors.
O. Service entrance cables and report as in need of repair
deficiencies in the integrity of the insulation, drip loop,
or separation of conductors at weatherheads and clearances.
II.
The inspector is not required to:
A.
Insert any tool, probe or device into the main or sub-panels.
B. Operate electrical systems that are shut down.
C. Remove panel covers or dead front covers if not readily
accessible.
D. Operate over current protection devices.
E. Operate non-accessible smoke detectors.
F. Measure or determine the amperage or voltage of the main
service if not visibly labeled.
G. Inspect the alarm system and components.
H. Inspect the ancillary wiring.
I. Activate any electrical systems or branch circuits which
are not energized.
J. Operate overload devices.
K. Inspect low voltage systems, electrical de-icing tapes,
swimming pool wiring or any time-controlled devices.
L. Verify the continuity of the connected service ground.
M. Inspect private or emergency electrical supply sources,
including but not limited to generators, windmills, photovoltaic
solar collectors, or battery or electrical storage facility.
N. Inspect spark or lightning arrestors.
O. Conduct drop voltage calculations.
P. Determine the accuracy of breaker labeling.
2.8.
Fireplace
I.
The inspector shall inspect:
A.
The fireplace, and open and close the damper door if readily
accessible and operable.
B. Hearth extensions and other permanently installed components.
C. And report as in need of repair deficiencies in the lintel,
hearth and material surrounding the fireplace, including clearance
from combustible materials
II.
The inspector is not required to:
A.
Inspect the vent system.
B. Inspect the interior of the chimney or flue, fire doors
or screens, seals or mantels.
C. Determine the need for a chimney sweep.
D. Operate gas fireplace inserts.
E. Light pilot flames.
F. Determine the appropriateness of such installation.
G. Inspect automatic fuel feed devices.
H. Inspect combustion make up devices.
I. Inspect heat distribution assists whether gravity controlled
or fan assisted.
J. Ignite or extinguish fires.
K. Determine draft characteristics.
L. Move fireplace inserts, stoves, or firebox contents.
M. Determine adequacy of draft, perform a smoke test or dismantle
or remove any component.
2.9.
Attic, Ventilation & Insulation
I.
The inspector shall inspect:
A.
The insulation in unfinished spaces.
B. The ventilation of attic spaces.
C. Mechanical ventilation systems.
D. And report on the general absence or lack of insulation.
II.
The inspector is not required to:
A.
Enter the attic or unfinished spaces that are not readily
accessible or where entry could cause damage or pose a safety
hazard to the inspector in his or her opinion.
B. To move or touch insulation.
C. To move or touch vapor retarders.
D. Break or otherwise damage the surface finish or weather
seal on or around access panels and covers.
E. Identify the composition or the exact R-value of insulation
material.
F. Activate thermostatically operated fans.
G. Determine the types of materials used in insulation/wrapping
of pipes, ducts, jackets, boilers, and wiring.
2.10.
Doors, Windows & Interior
I.
The inspector shall:
A.
Open and close a representative number of doors and windows.
B. Inspect the walls, ceilings, steps, stairways, and railings.
C. Inspect garage doors and garage door openers by operating
first by remote (if available) and then by the installed automatic
door control.
D. And report as in need of repair any installed electronic
sensors that are not operable or not installed at proper heights
above the garage door.
E. And report as in need of repair any door locks or side
ropes that have not been removed or disabled when garage door
opener is in use.
F. And report as in need of repair any windows that are obviously
fogged or display other evidence of broken seals.
II.
The inspector is not required to:
A.
Inspect paint, wallpaper, window treatments or finish treatments.
B. Inspect central vacuum systems.
C. Inspect safety glazing in locations subject to human impact.
D. Inspect security components.
E. Evaluate the fastening of countertops, cabinets, sink tops
and fixtures, or firewall compromises.
F. Move furniture, stored items, or any coverings like carpets
or rugs in order to inspect the concealed floor structure.
G. Move drop ceiling tiles.
H. Inspect or move any household appliances.
I. Inspect or operate equipment housed in the garage except
as otherwise noted.
J. Verify or certify safe operation of any auto reverse or
related safety function of a garage door.
K. Operate or evaluate security bar release and opening mechanisms,
whether interior or exterior, including compliance with local,
state, or federal standards.
L. Operate any system, appliance or component that requires
the use of special keys, codes, combinations, or devices.
M. Operate or evaluate self-cleaning oven cycles or signal
lights.
N. Determine leakage from microwave ovens.
O. Operate or examine any sauna, steam-jenny, kiln, toaster,
ice-maker, coffee-maker, can-opener, bread-warmer, blender,
instant hot water dispenser, or other small, ancillary devices.
P. Inspect elevators.
Q. Inspect remote controls.
R. Inspect appliances.
S. Inspect items not permanently installed.
T. Examine or operate any above-ground, movable, freestanding,
or otherwise non-permanently installed pool/spa or self-contained
equipment.
U. Come into contact with any pool or spa water in order to
determine the system structure or components.
V. Determine the adequacy of spa jet water force or bubble
effect.
W. Determine the structural integrity or leakage of a pool
or spa.
3.
Limitations, Exceptions & Exclusions
3.1.
Limitations:
I.
An inspection is not technically exhaustive.
II. An inspection will not identify concealed or latent defects.
III. An inspection will not deal with aesthetic concerns or
what could be deemed matters of taste, cosmetic, etc.
IV. An inspection will not determine the suitability of the
property for any use.
V. An inspection does not determine the market value of the
property or its marketability.
VI. An inspection does not determine the advisability or inadvisability
of the purchase of the inspected property.
VII. An inspection does not determine the life expectancy of
the property or any components or systems therein.
VIII. An inspection does not include items not permanently installed.
IX. These Standards of Practice apply only to homes with four
or fewer dwelling units.
3.2. Exclusions:
I.
The inspectors are not required to determine:
A.
Property boundary lines or encroachments.
B. The condition of any component or system that is not readily
accessible.
C. The service life expectancy of any component or system.
D. The size, capacity, BTU, performance, or efficiency of
any component or system.
E. The cause or reason of any condition.
F. The cause for the need of repair or replacement of any
system or component.
G. Future conditions.
H. The compliance with codes or regulations.
I. The presence of evidence of rodents, animals or insects.
J. The presence of mold, mildew or fungus.
K. The presence of air-borne hazards.
L. The presence of birds.
M. The presence of other flora or fauna.
N. The air quality.
O. The existence of asbestos.
P. The existence of environmental hazards.
Q. The existence of electro-magnetic fields.
R. The presence of hazardous materials including, but not
limited to, the presence of lead in paint.
S. Any hazardous waste conditions.
T. Any manufacturer recalls or conformance with manufacturer
installation or any information included in the consumer protection
bulletin.
U. Operating costs of systems.
V. Replacement or repair cost estimates.
W. The acoustical properties of any systems.
X. Estimates of how much it will cost to run any given system.
II.
The inspectors are not required to operate:
A.
Any system that is shut down.
B. Any system that does not function properly.
C. Or evaluate low voltage electrical systems such as, but
not limited to:
1. Phone lines.
2. Cable lines.
3. Antennae.
4. Lights.
5. Remote controls.
D. Any system that does not turn on with the use of normal
operating controls.
E. Any shut off valve.
F. Any electrical disconnect or over current protection devices.
G. Any alarm systems.
H. Moisture meters, gas detectors or similar equipment.
III.
The inspectors are not required to:
A.
Move any personal items or other obstructions, such as, but
not limited to:
1.
Throw rugs.
2. Furniture.
3. Floor or wall coverings.
4. Ceiling tiles
5. Window coverings.
6. Equipment.
7. Plants.
8. Ice.
9. Debris.
10. Snow.
11. Water.
12. Dirt.
13. Foliage.
14. Pets
B.
Dismantle, open, or uncover any system or component.
C. Enter or access any area which may, in the opinion of the
inspector, to be unsafe or risk personal safety.
D. Enter crawlspaces or other areas that are unsafe or not
readily accessible.
E. Inspect underground items such as, but not limited to,
underground storage tanks or other indications of their presence,
whether abandoned or actively used.
F. Do anything which, in the inspector's opinion, is likely
to be unsafe or dangerous to the inspector or others or damage
property, such as, but not limited to, walking on roof surfaces,
climbing ladders, entering attic spaces or negotiating with
dogs.
G. Inspect decorative items.
H. Inspect common elements or areas in multi-unit housing.
I. Inspect intercoms, speaker systems, radio-controlled, security
devices or lawn irrigation systems.
J. Offer guarantees or warranties.
K. Offer or perform any engineering services.
L. Offer or perform any trade or professional service other
than home inspection.
M. Research the history of the property, report on its potential
for alteration, modification, extendibility, or its suitability
for a specific or proposed use for occupancy.
N. Determine the age of construction or installation of any
system structure, or component of a building, or differentiate
between original construction or subsequent additions, improvements,
renovations or replacements thereto.
O. Determine the insurability of a property.
4.
Glossary of Terms
4.1. Accessible: Can be approached or entered by
the inspector safely, without difficulty, fear or danger.
4.2. Activate: To turn on, supply power, or enable
systems, equipment, or devices to become active by normal operating
controls. Examples include turning on the gas or water supply valves
to the fixtures and appliances and activating electrical breakers
or fuses.
4.3. Adversely Affect: Constitute, or potentially
constitute, a negative or destructive impact.
4.4. Alarm System: Warning devices, installed or
free-standing, including but not limited to: Carbon monoxide detectors,
flue gas and other spillage detectors, security equipment, ejector
pumps and smoke alarms.
4.5. Appliance: A household device operated by use
of electricity or gas. Not included in this definition are components
covered under central heating, central cooling or plumbing.
4.6. 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.
4.7. Component: A permanently installed or attached
fixture, element or part of a system.
4.8. Condition: The visible and conspicuous state
of being of an object.
4.9. Crawlspace: The area within the confines of
the foundation and between the ground and the underside of the lowest
floor structural component.
4.10. Decorative: Ornamental; not required for the
operation of essential systems and components of a home.
4.11. Describe: Report in writing a system or component
by its type, or other observed characteristics, to distinguish it
from other components used for the same purpose.
4.12. Determine: To arrive at an opinion or conclusion
pursuant to examination.
4.13. Dismantle: To open, take apart or remove any
component, device or piece that would not typically be opened, taken
apart or removed by an ordinary occupant.
4.14. Engineering Service: Any professional service
or creative work requiring engineering education, training, and
experience and the application of special knowledge of the mathematical,
physical and engineering sciences to such professional service or
creative work as consultation, investigation, evaluation, planning,
design and supervision of construction for the purpose of assuring
compliance with the specifications and design, in conjunction with
structures, buildings, machines, equipment, works or processes.
4.15. Enter: To go into an area to observe all visible
components.
4.16. Evaluate: To assess the systems, structures
or components of a dwelling.
4.17. Examine: To visually look. See Inspect.
4.18. Foundation: The base upon which the structure
or wall rests; usually masonry, concrete, or stone, and generally
partially underground.
4.19. Function: The action for which an item, component,
or system is specially fitted or used or for which an item, component
or system exists; to be in action or perform a task.
4.20. Functional: Performing, or able to perform,
a function.
4.21. Home Inspection: The process by which an inspector
visually examines the readily accessible systems and components
of a home and operates those systems and components utilizing these
Standards of Practice as a guideline.
4.22. Household Appliances: Kitchen and laundry
appliances, room air conditioners, and similar appliances.
4.23. Inspect: To visually look at readily accessible
systems and components safely, using normal operating controls and
accessing readily accessible panels and areas.
4.24. Inspected Property: The readily accessible areas of the buildings,
site, items, components, and systems included in the inspection.
4.25. Inspector: One who performs a real estate
inspection.
4.26. Installed: Attached or connected such that
the installed item requires tool for removal.
4.27. Material Defect: Refer to section 1.2.
4.28. Normal Operating Controls: Devices such as
thermostats that would be operated by ordinary occupants which require
no specialized skill or knowledge.
4.29. Observe: To see through visually directed
attention.
4.30. Operate: To cause systems to function or turn
on with normal operating controls.
4.31. Readily Accessible: An item or component is
readily accessible if, in the judgment of the inspector, it is capable
of being safely observed without movement of obstacles, detachment
or disengagement of connecting or securing devices, or other unsafe
or difficult procedures to gain access.
4.32. Recreational Facilities: Spas, saunas, steam
baths, swimming pools, tennis courts, playground equipment, and
other exercise, entertainment or athletic facilities.
4.33. Report: A written communication (possibly
including digital images) of any material defects seen during the
inspection.
4.34. Representative Number: A sufficient number
to serve as a typical or characteristic example of the item(s) inspected.
4.35. Safety Glazing: Tempered glass, laminated
glass, or rigid plastic.
4.36. Shut Down: Turned off, unplugged, inactive,
not in service, not operational, etc.
4.37. Structural Component: A component which supports
non-variable forces or weights (dead loads) and variable forces
or weights (live loads).
4.38. System: An assembly of various components
to function as a whole.
4.39. Technically Exhaustive: A comprehensive and
detailed examination beyond the scope of a real estate home inspection
which would involve or include, but would not be limited to: dismantling,
specialized knowledge or training, special equipment, measurements,
calculations, testing, research, analysis or other means.
4.40. Unsafe: A condition in a readily accessible,
installed system or component which is judged to be a significant
risk of personal injury during normal, day-to-day use. The risk
may be due to damage, deterioration, improper installation or a
change in accepted residential construction standards.
4.41. Verify: To confirm or substantiate.Visit
NACHI's full Glossary.
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