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BUILDING INTERIORS

ACOUSTICAL SEALANT CHOICES
AGE of a BUILDING - how to determine
AIR BYPASS LEAKS
AIR LEAK DETECTION TOOLS
AIR LEAK MINIMIZATION
AIR POLLUTANTS, COMMON INDOOR
AIR LEAK SEALING PROCEDURE
AIR SEALING STRATEGIES
ANIMAL ALLERGENS

ANTI SCALD VALVES
APPLIANCE EFFICIENCY RATINGS
ARCHITECTURE & BUILDING COMPONENT ID
ASBESTOS IDENTIFICATION IN buildings
ATTIC LEAKS, CONDENSATION & MOLD
ATTIC VENTILATION

BASEMENT CEILING VAPOR BARRIER
BASEMENT HEAT LOSS
BASEMENT LEAKS, INSPECT FOR
BASEMENT WATERPROOFING
BATH & KITCHEN DESIGN GUIDE
BATHROOM VENTILATION
BEST CONSTRUCTION PRACTICES GUIDE
BLOWER DOORS & AIR INFILTRATION
BLOWER FAN CONTINUOUS OPERATION
BLOWER FAN OPERATION & TESTING
BLOWN-IN INSULATION
BOOKSTORE
BRICK LINED WALLS
BRICK VENEER WALL INSULATION
BRICK VENEER WALL Loose, Bulged
BRICK WALL DRAINAGE WEEP HOLES
BUCKLED FOUNDATIONS due to INSULATION?
BUILDING SAFETY HAZARDS GUIDE
BUILDING NOISE DIAGNOSIS & CURE

CACTUS FUNGI / MOLD
CAR MOLD CONTAMINATION
CARPET DUST IDENTIFICATION
CARPET MOLD CONTAMINATION
CARPET TEST PROCEDURE
CABINETS & COUNTERTOPS
CARPETING & INDOOR AIR QUALITY
CARPETING, SELECTION & INSTALLATION
CASEWORK, CABINETS, SHELVING INSTALLATION
CATHEDRAL CEILING INSULATION
CATHEDRAL CEILING VENTILATION
CEILING FINISHES INTERIOR
CEILINGS, DROP or SUSPENDED PANEL
CEILINGS, PLASTER TYPES
CERAMIC TILE FLOOR, WALL
CERAMIC TILE, ASBESTOS in?
CHIMNEY INSPECTION DIAGNOSIS & REPAIR
CHINESE DRYWALL HAZARDS
CLOGGED DRAIN DIAGNOSIS & REPAIR
COMBUSTION AIR for TIGHT buildings
CONDENSATION or SWEATING PIPES, TANKS
COOLING LOAD REDUCTION by ROOF VENTS
CRAWL SPACES

DEW POINT CALCULATION for WALLS
DEW POINT TABLE - CONDENSATION POINT GUIDE
DOORS, INTERIOR
DRYWALL HAZARDS, CHINESE
DRYWALL INSTALLATION Best Practices
DRYWALL MOLD
DRYWALL MOLD RESISTANT

EARTHQUAKE DAMAGED FOUNDATIONS
EFFLORESCENCE, Salts & White / Brown Deposits
ELDERLY & VETERANS HOME SAFETY
ELECTRICAL INSPECTION, DIAGNOSIS, REPAIR
ENERGY SAVINGS in buildings
ENGINEERED WOOD Flooring
ENGINEERED WOOD Products
EXTERIOR WALL SIDING TRIM & FINISHES

FIBERGLASS INSULATION
FIBERGLASS HAZARDS
FIBERGLASS INSULATION MOLD
FLAT ROOF MOISTURE & CONDENSATION
FLOOD DAMAGE ASSESSMENT, SAFETY & CLEANUP
FLOODS IN buildings-mold
FLOOR, CERAMIC TILE
FLOOR, CONCRETE SLAB CHOICES
FLOOR, CONCRETE SLAB POURED FINISH
FLOOR DAMAGE DIAGNOSIS
FLOOR, ENGINEERED WOOD & LAMINATES
FLOOR FRAMING & SUBFLOOR for TILE
FLOOR, KITCHEN & BATH OPTIONS
FLOOR, LAMINATE PLASTIC
FLOOR RADIANT HEAT Mistakes to Avoid
FLOOR, RESILIENT VINYL or CORK
FLOOR, STONE, GRANITE, MARBLE, AGGLOMER
FLOOR & SUBFLOOR MOLD, HIDDEN
FLOOR TYPES & DEFECTS
FLOOR TILE ASBESTOS IDENTIFICATION
FLOOR TILE HISTORY & INGREDIENTS
FLOOR TILE INSTALLATION DETAILS
FLOOR WOOD AGE TYPES HISTORY
FLOOR WOOD, DAMAGE DIAGNOSIS ;
FLOOR, WOOD ENGINEERED, LAMINATE, INSTALL
FLOOR, WOOD FINISHES
FLOOR, WOOD INSTALLATION GUIDE
FLOOR, WOOD MOISTURE
FLOOR, WOOD RADIANT HEAT
FLOOR, WOOD SOLID STRIP, PLANK
FLOOR, WOOD TYPES
FLOORING MATERIALS, Age, Types
FORMALDEHYDE HAZARDS
FOUNDATION BULGE or LEAN MEASUREMENTS
FOOTING & FOUNDATION DRAINS
FOUNDATION CRACKS & DAMAGE GUIDE
FOUNDATION WATERPROOFING
FRAMING DAMAGE, INSPECTION, REPAIR
FRAMING DETAILS for BETTER INSULATION
FREEZE-PROOF A BUILDING
FROST HEAVES, FOUNDATION, SLAB
FUNGICIDAL SPRAY & SEALANT USE GUIDE

GAS DETECTION & MEASUREMENT
GAS EXPOSURE EFFECTS, TOXIC
GAS EXPOSURE LIMITS & STANDARDS
GAS TEST PROCEDURES

HEAT LOSS in buildings
HEAT LOSS DETECTION TOOLS
HEAT LOSS INDICATORS
HEAT LOSS PREVENTION PRIORITIES
HEAT LOSS R U & K VALUE CALCULATION
HEAT TAPES & CABLES on Roofs for Ice Dams
HEATING COST SAVINGS METHODS
HOT ROOF DESIGNS: Un-Vented Roof Solutions
HOT WATER HEATERS
HOUSEWRAP AIR & VAPOR BARRIERS
HOUSE DOCTOR, how-to be
HUMIDITY LEVEL TARGET

ICE DAM PREVENTION
Ice Dams: Comparing Two Houses
INDOOR AIR QUALITY & HOUSE TIGHTNESS
INDOOR AIR QUALITY IMPROVEMENT GUIDE
INSULATION CHOICES
INSULATION FACT SHEET- DOE
INSULATION for GREENHOUSE or SOLARIUM
INSULATION IDENTIFICATION GUIDE
INSULATION INSPECTION & IMPROVEMENT
INSULATION LOCATION - WHERE TO PUT IT
INSULATION MOLD
INSULATION R-Values & Properties
INTERIOR FINISHES: BEST PRACTICES
INTERIOR FINISHES: DRYWALL

KIT HOMES, Aladdin, Sears, Wards, Others
KITCHEN & BATH DESIGN GUIDE

LIGHTING, EXTERIOR GUIDE
LIGHTING, INTERIOR GUIDE
  Accent Lighting, Definition, Uses
  Accent Lights
  Ambient Lighting, Definition, Uses
  Bathroom Lighting Guidelines
  Buy Lighting Products, Where to
  Closet Lighting Fire Safety
  Color Temperature and CRI for Indoor Lights
  Color Temperature Bulb Comparisons
  Common Lighting Terms
  Compact Fluorescent Lights, Indoors
  CRI Scale Rates & Definition
  Decorative Lighting, Definition, Uses
  Direct Lights, Types
  Downlights & Uses
  Fluorescent Lights, Compact Indoors
  Fluorescent Lighting Guide, Indoors
  Fluorescent vs Standard Incandescent Bulb
  Gas Lighting Pipes & Fixtures
  GLARE, Sunlight/Lighting Control
  Halogen Lights, Indoor Uses
  Incandescent Light Bulbs Guide
  Indirect Lights & Best Uses
  Kitchen Lighting, Ambient Specifications
  Kitchen Lighting Counters, Sinks, Cooktops
  Kitchen Lighting Requirements
  Lamp & Bulb Abbreviations & Types
  Lamp & Bulb Types, Indoor
  Lighting Levels Indoors, Recommended
  Low-voltage Lighting Guide, Indoors
  Lumens, Definition, comparisons
  Luminaires, Definition, Uses
  Recessed Light Housings,Guide to
  Recessed & Track Lighting Best Uses
  Recessed & Track Light Bulb, Guide to
  Recessed Lighting Fixture Trims
  Rules of Thumb for Interior Lighting
  Spacing, Light Fixture
  Table Top Lighting Specifications
  Task Lighting, Definition , Uses
LIGHTNING PROTECTION SYSTEMS
LOW VOLTAGE BUILDING WIRING
LOG HOME GUIDE

METAL LATH, PLASTER & STUCCO
MIXING / ANTI-SCALD VALVES
MOBILE HOME INSPECTIONS
MOISTURE CONTROL in BUILDINGS
MOLD in FOAM INSULATION, RESISTANCE
MOLD INFORMATION CENTER

Nanomaterials Hazards
NOISE / SOUND DIAGNOSIS & CURE
NOISE, AIR CONDITIONER COMPRESSOR
NOISE, DUCT VIBRATION DAMPENERS
NOISE CONTROL for HEATING SYSTEMS
NOISE CONTROL for FLOORS
NOISE CONTROL for PLUMBING
NOISE CONTROL for ROOFS
NOISE, PLUMBING DRAIN DIAGNOSIS
NOISE, PLUMBING DRAIN REPAIR
NOISE, PLUMBING CHECKLIST
NOISE, WATER HEATER
NOISES, WATER PUMP

ODORS & SMELLS DIAGNOSIS & CURE

PASCAL CALCULATIONS
PAINT FALURE, DIAGNOSIS, CURE, PREVENTION
PLASTER
PLASTER & BEAVERBOARD & DRYWALL
PLASTER BULGES & PILLOWS
PLASTER LATH, METAL
PLASTER, LOOSE FALL HAZARDS
PLASTER TYPE IDENTIFICATION
PLASTER VENEER Best Practices
PLASTER VENEER Best Practices

RADIANT HEAT
RADIANT HEAT Floor Mistakes to Avoid
RADIANT HEAT TEMPERATURES
RADIANT SLAB FLOORING CHOICES
RADIANT SLAB TUBING & FLUID CHOICES
ROOF VENTILATION SPECIFICATIONS
ROT, FUNGUS, TERMITES
ROT, TIMBER FRAME

SAFETY HAZARDS & INSPECTIONS
SAFETY: Elderly & Veterans Home Safety
SAFETY for ELECTRICAL INSPECTORS
SEARS KIT HOUSES
SINKHOLES, WARNING SIGNS
SINKING BUILDINGS
SLAB CRACK EVALUATION
SOUND CONTROL in buildings
Splits in Structural Wood Beams
STAIN DIAGNOSIS on BUILDING EXTERIORS
STAIN DIAGNOSIS on BUILDING INTERIORS
STAINS & FINISHES, INTERIOR
STAIRS, RAILINGS, LANDINGS, RAMPS
STONE CLEANING METHODS
STRESS SKIN INSULATED PANELS
STUCCO WAll FAILURES DUE TO WEATHER
STUCCO WALL METHODS & INSTALLATION
STUCCO OVER FOAM INSULATION
STUCCO PAINT FAILURES
SUMP PUMPS GUIDE
SWEATING (CONDENSATION) on PIPES, TANKS

THERMAL EXPANSION of MATERIALS
THERMAL MASS in buildings
THERMAL TRACKING Indicates Heat Loss
TILE INSTALLATION DETAILS
TRIM, INTERIOR INSTALLATION
TRUSS UPLIFT, ROOF
TRUSSES, Floor & Roof

VAPOR BARRIERS & CONDENSATION in BUILDINGS
VENTILATION in buildings
VINYL Siding or PLASTIC Window ODORS in buildings
VINYL CHLORIDE HEALTH INFO

WALL SIDING TRIM & FINISHES
WALL FINISHES INTERIOR
WATER BARRIERS, EXTERIOR BUILDING
WATER ENTRY in buildings
WINDOWS & DOORS
WINTERIZE A BUILDING
WOOD Burning Heaters Fireplaces Stoves
WOOD FLOOR DAMAGE

More Information

Bathroom Lighting (C) Daniel Friedman Guide to Recommended Lighting Levels for Indoor Areas
Tables & Rules of Thumb for Interior Lighting
InspectAPedia®  -      

  • Tables of recommended lighting levels indoors
  • Handy rules of thumb for indoor lighting levels and requirements
  • Uses & properties of incandescent, halogen, low-voltage, and fluorrescent bulbs, lamps, and lights indoors
InspectAPedia tolerates no conflicts of interest. We have no relationship with advertisers nor with topics or services discussed at this website.

This article series details guidelines for selecting and installing interior lighting to meet the requirements for different building areas. This article includes excerpts or adaptations from Best Practices Guide to Residential Construction, by Steven Bliss, courtesy of Wiley & Sons.

Also see LIGHTING, INTERIOR GUIDE our home page for information about all lighting topics relating to building interior

© Copyright 2012 InspectAPedia.com, All Rights Reserved. Information Accuracy & Bias Pledge is at below-left. Use page top links to major topics or use links at the left of each page to navigate within topics and documents at this website. Green links show where you are in a document series or at this website.

Guide to Recommended Lighting Levels Indoors

Bath light, poorly placed (C) D FriedmanMany factors affect the illumination needed for a specific task. An often overlooked factor is the age of the occupants. At 60 years old, we need two to three times the light we needed at age 20, and also more shielding and diffusers since older eyes are more sensitive to glare.

The other main factors in determining lighting requirements are how detailed the work is and the level of contrast and reflectance of the work surface.

Table 5-21 shows the recommended lighting along with common strategies for each type of room. For task lighting, the low numbers in each range represent the light needed for simple tasks with high contrast (reading large black type on white paper).

The high number is for tasks with more detail or lower contrast (reading the newspaper). For very detailed, low-contrast work or for older persons, light levels of 100 footcandles are often needed.

Table 5-21: Suggested Lighting Strategies and Lighting Levels by Room Type (C) J Wiley, S Bliss

Interior Lighting Rules of Thumb

Task lighting (C) D FriedmanThe illumination level on a surface depends on many factors, including the colors of the room and furnishings and the type of lamp and fixture. High ceilings, dark colors, and diffusers on fixtures all reduce light levels. The commonly used black baffles in recessed lights reduce output by up to 40%.

Tightly focused spots produce much higher light levels than wide floods.

Rules about Distance from Light Source

The distance from the light source is also critical. Doubling the distance to a lamp reduces the lighting level by a factor of four. So moving the light closer to the task is often the simplest way to provide a big boost in lighting levels.

Rule of Thumb for Brightly-Lit Space Needs

As a starting point for design in kitchens, baths, home offices, and other brightly lit spaces, provide at least 2 watts of incandescent light or 3/4-watt of fluorescent light per square foot of floor area. In larger spaces, using multiple fixtures will provide more even lighting and reduce glare.

Also, since lighting needs change throughout the day with changes in daylight and usage, it is good to provide flexibility by separately switching groups of lights and adding dimmers. Increase these minimums by 50 to 100% for:

  • Valences or other indirect lighting schemes
  • Rooms with dark surfaces
  • Lighting placed in cathedral ceilings or other high ceilings
  • Recessed lighting with diffusers, black baffles, or other light-blocking trim

-- Adapted with permission from Best Practices Guide to Residential Construction.

Resources: Manufacturers, Industry Associations, & Sources of Indoor Wall Materials, Flooring, Carpeting, Lighting, Sound Control Materials

Industry & Trade Associations for Lighting and Other Interior Components in buildings

American Lighting Association www.americanlightingassoc.com

Association of the Wall and Ceiling Industries www.awci.org

Carpet and Rug Institute (CRI) www.carpet-rug.org

Drywall Finishing Council www.dwfc.org

Forest Stewardship Program www.fscus.org

FloorFacts www.floorfacts.com

The Gypsum Association www.gypsum.org

National Oak Flooring Manufacturers Association (NOFMA) www.nofma.com

National Wood Flooring Association www.woodfloors.org

Painting and Decorating Contractors of America www.pdca.org Smartwood/Rainforest Alliance www.smartwood.org

-- Adapted with permission from Best Practices Guide to Residential Construction.

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LIGHTING, EXTERIOR GUIDE
LIGHTING, INTERIOR GUIDE - see detailed links at page left

Books & Articles on Building & Environmental Inspection, Testing, Diagnosis, & Repair

  • Our recommended books about building & mechanical systems design, inspection, problem diagnosis, and repair, and about indoor environment and IAQ testing, diagnosis, and cleanup are at the InspectAPedia Bookstore. Also see our Book Reviews - InspectAPedia.
  • Home Reference Book - Carson Dunlop The Home Reference Book - the Encyclopedia of Homes, Carson Dunlop & Associates, Toronto, Ontario, 2010, $69.00 U.S., is available from Carson Dunlop, and from the InspectAPedia bookstore. The 2010 edition of the Home Reference Book is a bound volume of more than 450 illustrated pages that assist home inspectors and home owners in the inspection and detection of problems on buildings. The text is intended as a reference guide to help building owners operate and maintain their home effectively. InspectAPedia.com ® author/editor Daniel Friedman is a contributing author. Field inspection worksheets are included at the back of the volume.
  • Best Practices Guide to Residential Construction, by Steven Bliss. John Wiley & Sons, 2006. ISBN-10: 0471648361, ISBN-13: 978-0471648369, Hardcover: 320 pages, available from Amazon.com and also Wiley.com. See our book review of this publication.
  • Recommended books on electrical inspection, electrical wiring, electrical problem diagnosis, and electrical repair can be found in the Electrical Books section of the InspectAPedia Bookstore. (courtesy of Amazon.com)
  • * Safety Hazards and Safe Inspection Procedures for Electrical and Home Inspectors at Residential Electric Panels
  • Aluminum Wiring Information Website Aluminum Electrical Wiring Hazards and Repairs: in-depth authoritative info, photos, documents including selection of proper vs. ineffective repair methods. E.g.: Ideal 65 "Twister" purple connector fails in field and lab testing with aluminum wire.
  • Ampacity of an Electrical Service: How to determine the electrical service size or ampacity entering a building
  • Circuit Breaker, a bad one fails to trip failure at aluminum bus-to-circuit breaker connection - field report and photographs
  • Electrical Panels, How to Inspect in buildings, safety for electrical inspectors, electrical panel, fusing, wiring defects, defective products. Inspection Class Presentation
  • Federal Pacific Electric (FPE) Stab-Lok Circuit Breaker Panel Hazards Website - Latent fire hazards, in-depth authoritative research, documents, advice on Stab-Lok electric panel and circuit breaker failures and what to do when this equipment is found in buildings.
  • Lightning Strike Risk Assessment, Protection Systems & Services
  • Multi-wire branch circuit inspection and defects
  • Rust and Corrosion in Electrical Panels, A Study and Report on Frequency and Cause for Electrical and Home Inspectors at Residential Electric Panels
  • "Electrical System Inspection Basics," Richard C. Wolcott, ASHI 8th Annual Education Conference, Boston 1985.
  • Safety Hazards and Safe Inspection Procedures for Electrical and Home Inspectors at Residential Electric Panels
  • "Simplified Electrical Wiring," Sears, Roebuck and Co., 15705 (F5428) Rev. 4-77 1977 [Lots of sketches of older-type service panels.]
  • "How to plan and install electric wiring for homes, farms, garages, shops," Montgomery Ward Co., 83-850.
  • "Electrical System Inspection Basics," Richard C. Wolcott, ASHI 8th Annual Education Conference, Boston 1985.
  • "Simplified Electrical Wiring," Sears, Roebuck and Co., 15705 (F5428) Rev. 4-77 1977 [Lots of sketches of older-type service panels.]
  • "How to plan and install electric wiring for homes, farms, garages, shops," Montgomery Ward Co., 83-850.
  • "Home Wiring Inspection," Roswell W. Ard, Rodale's New Shelter, July/August, 1985 p. 35-40.
  • "Evaluating Wiring in Older Minnesota Homes," Agricultural Extension Service, University of Minnesota, St. Paul, Minnesota 55108.
  • "Electrical Systems," A Training Manual for Home Inspectors, Alfred L. Alk, American Society of Home Inspectors (ASHI), 1987, available from ASHI. [DF NOTE: I do NOT recommend this obsolete publication, though it was cited in the original Journal article as it contains unsafe inaccuracies]
  • "Basic Housing Inspection," US DHEW, S352.75 U48, p.144, out of print, but is available in most state libraries.
  • Electrical System & Wiring Hazard Inspection, Detection, Cause, Remedy, Prevention - Main Electrical Page
  • ...

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