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ROOFING INSPECTION & REPAIR
EXTERIORS of buildings
ADHESIVES, EXTERIOR CONSTRUCTION
AGE of a BUILDING - how to determine
ALGAE, FUNGUS, LICHENS, MOSS
ANIMAL ENTRY POINTS in buildings
ARCHITECTURE & BUILDING COMPONENT ID
BARK SIDE UP on DECKS & STEPS
BRICK STRUCTURAL WALL Loose Bulged
BRICK VENEER WALL Loose, Bulged
BRICK WALL DRAINAGE WEEP HOLES
BOOKSTORE - EXTERIORS
CAULK GUN TYPES, CHOICES
CAULKS & SEALANTS, EXTERIOR
CHIMNEY INSPECTION DIAGNOSIS REPAIR
DECK & PORCH CONSTRUCTION
DECK FINISHES COATINGS PRESERVATIVES
DRYWELLS, FRENCH DRAINS for FLAT SITES
EIFS & STUCCO EXTERIORS
EXTERIOR WALL SIDING TRIM & FINISHES
EXTRACTIVE BLEEDING STAINS
FLASHING ROOF-WALL SNAFU
GALVANIC SCALE & METAL CORROSION
GLUES ADHESIVES, EXTERIOR CONSTRUCTION
GRADING, DRAINAGE & SITE WORK
GUTTERS & DOWNSPOUTS
HOUSE PARTS, DEFINITIONS
HOUSEWRAP / SHEATHING WRAP
HOUSEWRAP INSTALLATION DETAILS
HOUSEWRAP PRODUCT CHOICES
HOUSEWRAP at SILLS, SOLES, TOP PLATES
ICE DAM PREVENTION
INSECT INFESTATION / DAMAGE
LEAD POISONING HAZARDS GUIDE
LOG HOME GUIDE
PAINT & STAIN GUIDE, EXTERIOR
PAINT & STAIN LIFE CHART
PAINT & STAIN SELECTION & PROCEDURES
PAINT ANALYSIS, DIAGNOSTIC USES
PAINT FALURE, DIAGNOSIS, CURE, PREVENTION
PAINT FAILURE DICTIONARY
PAINT LAB SAMPLE PREPARATION
PAINT SURFACE PREPARATION
PORCHES & Sunrooms
PORCH CONSTRUCTION & SCREENING
RAILINGS, DECK & PORCH
RETAINING WALL DESIGNS, TYPES, DAMAGE
RETAINING WALL GUARD RAILINGS
ROOF CLEANING RECOMMENDATIONS
ROT RESISTANT LUMBER
SHEATHING, Gypsum board
Sheathing Celotex Homasote & Other
SHEATHING, FOIL FACED - VENTS
SIDING TYPES, INSTALLATION, DEFECTS
SINKHOLES, WARNING SIGNS
STAIN DIAGNOSIS on BUILDING EXTERIORS
STAIN DIAGNOSIS on ROOFS
STAIN DIAGNOSIS on STONE
STAIRS, RAILINGS, LANDINGS, RAMPS
STONE CLEANING METHODS
STONE VENEER WALLS
STUCCO WAll FAILURES DUE TO WEATHER
STUCCO WALL METHODS & INSTALLATION
STUCCO OVER FOAM INSULATION
STUCCO PAINT FAILURES
SURFACE GRADING, SITE DRAINAGE
Thermal Expansion Cracking of Brick
TREES & SHRUBS, TRIM OFF BUILDING
TRIM, EXTERIOR CHOICES, INSTALLATION
VINYL Siding or PLASTIC Window ODORS
WATER BARRIERS, EXTERIOR BUILDING
WATER ENTRY in buildings
WINDOWS & DOORS
Building flashing home page: this article describes the use of flashing on buildings to prevent leaks, to seal between intersecting building sections or components. We explain the basic principles of building flashing: why flashing succeeds or fails, and we list the types of flashing materials used on buildings. By links to additional articles on specific building flashing procedures we provide detals about how best to install flashing at all building areas where it is used: foundation, walls, windows, doors, roofs, and roof penetrations such as chimneys & plumbing vents.
Green links show where you are. © Copyright 2013 InspectAPedia.com, All Rights Reserved. Author Daniel Friedman.
The consequences of a flashing error or omission on a building can cause serious building damage and even injuries or health problems as water intrusion eventually means costly mold contamination, building rot, building insect damage, and in extreme cases collapse of portions of a structure. Bad deck flashing, for example, has been the cause of more than one deck collapse.
At left we show a plumbing vent stack flashing properly installed on an asphalt shingle roof.
Common Flashing Problem Areas or Mistakes
When we trace leaks on buildings to flashing errors it is often remarkable to see where & how the installer forgot a few basic concepts that explain the use and success or failure of using flashing materials to protect a building against leaks.
Flashing is supposed to redirect water: flashing refers to the use of a material (metal, rubber, plastic, for example) to mechanically intercept water and redirect it back out to the building interior instead of permitting the water to enter the building structure
Water flows down hill: mostly. So if flashing is improperly positioned, say with an opening facing "up-slope" into the direction from which water originates, it's going to leak.
Tthe articles listed in Related Topics above provide detailed flashing selection, installation, inspection, troubleshooting and repair procedures for all building areas.
Top Ten Flashing Fantasies We Love to Find on Buildings
Flashing fantasy No. 4: longer flashing is better
Flashing in a roof valley with nice looking copper or aluminum is so satisfying - wouldn't it be best to make one giant long piece - after all that elimninates joints. Leaks happen at the joints, right?
Well sort-of. But a too-long copper or aluminum valley flashing segment cycles between hot and cold temperatures, flexes, and eventually cracks as these photographs make plain.
Frequently Asked Questions (FAQs) about building flashing for roofs, decks, porches, walls, windows, doors etc.
Questions & answers or comments about building flashing for roofs, decks, porches, walls, windows, doors etc.
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Technical Reviewers & References
Related Topics, found near the top of this page suggest articles closely related to this one.