Free Encyclopedia of Building & Environmental Inspection, Testing, Diagnosis, Repair
Ask a Question or Search InspectAPedia
InspectAPedia ® Home
EXTERIORS of buildings
ADHESIVES, EXTERIOR CONSTRUCTION
AGE of a BUILDING - how to determine
ALGAE, FUNGUS, LICHENS, MOSS
ANIMAL ENTRY POINTS in buildings
ANIMAL ODORS IN buildings
ARCHITECTURE & BUILDING COMPONENT ID
ASBESTOS IDENTIFICATION IN buildings
ATTIC CONDENSATION CAUSE & CURE
BEST CONSTRUCTION PRACTICES GUIDE
BOOKSTORE - EXTERIORS
CAULK GUN TYPES, CHOICES
CAULKS & SEALANTS, EXTERIOR
CONNECTORS, FASTENERS, TIES
DECK & PORCH CONSTRUCTION
EIFS & STUCCO EXTERIORS
EXTERIOR WALL SIDING TRIM & FINISHES
EXTRACTIVE BLEEDING STAINS
FLASHING MEMBRANES PEEL & STICK
FLASHING SIDING DETAILS
FLASHING WALL DETAILS
FLASHING WINDOW DETAILS
GALVANIC SCALE & METAL CORROSION
GLUES ADHESIVES, EXTERIOR CONSTRUCTION
GUTTERS & DOWNSPOUTS
HOUSE PARTS, DEFINITIONS
HOUSEWRAP / SHEATHING WRAP
HOUSEWRAP INSTALLATION DETAILS
HOUSEWRAP PRODUCT CHOICES
HOUSEWRAP at SILLS, SOLES, TOP PLATES
HUMIDITY LEVEL TARGET
INDOOR AIR QUALITY & HOUSE TIGHTNESS
INSECT INFESTATION / DAMAGE
KIT HOMES, Aladdin, Sears, Wards, Others
LEAD POISONING HAZARDS GUIDE
LEED GREEN BUILDING CERTIFICATION
LOG HOME GUIDE
METAL LATH, PLASTER & STUCCO
MOISTURE CONTROL in BUILDINGS
ODORS & SMELLS DIAGNOSIS & CURE
PAINT & STAIN GUIDE, EXTERIOR
PAINT FALURE, DIAGNOSIS, CURE, PREVENTION
PAINT FAILURE DICTIONARY
PAINT SURFACE PREPARATION
PORCHES & Sunrooms
PORCH CONSTRUCTION & SCREENING
ROT RESISTANT LUMBER
ROT, TIMBER FRAME
ROT, TIMBER ASSESSMENT
SEARS KIT HOUSES
SMELL PATCH TEST to Track Down Odors
SOUND CONTROL in buildings
STAINS on & in BUILDINGS, CAUSES & CURES
STAIN DIAGNOSIS on BUILDING EXTERIORS
STAIN DIAGNOSIS on BUILDING INTERIORS
STAIRS, RAILINGS, LANDINGS, RAMPS
STONE CLEANING METHODS
STUCCO WAll FAILURES DUE TO WEATHER
STUCCO WALL METHODS & INSTALLATION
TEST KITS for DUST, MOLD, PARTICLE TESTS
Thermal Expansion Cracking of Brick
THERMAL EXPANSION of MATERIALS
THERMAL IMAGING, THERMOGRAPHY
THERMAL MASS in BUILDINGS
TREES & SHRUBS, TRIM OFF BUILDING
TRIM, EXTERIOR CHOICES, INSTALLATION
VAPOR BARRIERS & CONDENSATION in buildings
VAPOR BARRIERS, VINYL SIDING
VENTILATION in BUILDINGS
VINYL CHLORIDE HEALTH INFO
VINYL Siding or PLASTIC Window ODORS
Volatile Organic Compounds VOCs
WALL CONSTRUCTION BARRIER vs CAVITY
WATER BARRIERS, EXTERIOR BUILDING
WATER ENTRY in buildings
WIND ENERGY SYSTEMS
WIND TURBINES & LIGHTNING
WINDOWS & DOORS
WINTERIZE A BUILDING
This article discusses how to control direct and indirect glare caused by sunlight in green houses and sunspaces.
Green links show where you are. © Copyright 2013 InspectAPedia.com, All Rights Reserved. Author Daniel Friedman.
The accompanying text is reprinted/adapted/excerpted with permission from Solar Age Magazine - editor Steven Bliss. Our page top photos shows a sunspace constructed by the website editor (DF) and an example of indirect solar glare (to the right of the plant in our photograph).
Readers should see GREENHOUSE DESIGN for SOLAR HEATING, also see INSULATION for GREENHOUSE or SOLARIUM. Details about solar shades that may be useful in controlling solar glare are found at SOLAR SHADES & SUNSCREENS and SOLAR SHADES, LOW-E EFFECTIVENESS. Contact us to suggest text changes and additions and, if you wish, to receive online listing and credit for that contribution.
Beating Sunspace or Greenhouse Glare in buildings
Question: what strategies are most promising for controlling indoor glare from sunlight or other sources?
A building we own and occupy has a three-story atrium/sunspace with over 30 2x5-foot windows. Our computer room faces the atrium and users complain about the glare.
We are considering installing shades or films to control the glare from sunlight. What solar glare strategies are most promising? - Lou Nemesec, Illinois Industrial Commission, Chicago IL
Answer: Solutions to Sunlight and Indoor Light Glare
Types of Light Glare: Indirect & Direct
There are two kinds of glare: direct glare and indirect glare.
Direct glare is caused by light coming directly into the eye from the light source.
Indirect glare is caused by reflected light (see our photo at page top).
Strategies for Controlling Glare in buildings
As we elaborate below, you can control glare and reduce glaring light complaints in buildings by one or more of the following six methods:
You can control glare by reducing the brightness or size of the light source, changing the position of the light source, or making the area around the light source brighter.
We assume that the complaints about glare come from long exposure, since short term exposure to glare can usually be tolerated. We also assume that you can't rearrange the building or room to change the relationship between the light source, work surface, and the workers themselves in order to change the angles of light and light reflection to simply eliminate the problem.
The size of the light source in your building too is fixed, unless you block out some of the entering sunlight with an opaque material.
So what measures are left to reduce indoor glaring light problems?
You could reduce the contrast between the incoming light and the surrounding surfaces by increasing the lighting level on the interior surfaces with electric lighting.
But it seems that your best bet is limiting the brightness of the light source.
If you need year-round help, use window films. Window films can cut out anywhere from 45 to 86 percent of the incoming light. If view is not important, permanent louvers may do.
If you want seasonal control over glaring light, use movable or removable shades or blinds. Interior choices for glaring light source control include vertical or horizontal blinds(discussed in more detail at SOLAR SHADES & SUNSCREENS).
External choices for glaring light control include woven fiberglass shades or aluminum mini-louvers.
Frequently Asked Questions (FAQs)
Questions & answers or comments about controlling glare problems at and in buildings .
Ask a Question or Enter Search Terms in the InspectApedia search box just below.
Technical Reviewers & References
Related Topics, found near the top of this page suggest articles closely related to this one.