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EXTERIORS of buildings
AGE of a BUILDING - how to determine
ALGAE, FUNGUS, LICHENS, MOSS
ANIMAL ENTRY POINTS in BUILDINGS
ANIMAL or URINE ODOR SOURCE DETECTION
ARCHITECTURE & BUILDING COMPONENT ID
ATTIC CONDENSATION CAUSE & CURE
BEST CONSTRUCTION PRACTICES GUIDE
BRICK VENEER WALL LOOSE, BULGED
BRICK WALL DRAINAGE WEEP HOLES
BOOKSTORE - EXTERIORS
CAULK GUN TYPES, CHOICES
CAULKS & SEALANTS, EXTERIOR
CONNECTORS, FASTENERS, TIES
DRYWELLS, FRENCH DRAINS for FLAT SITES
EIFS & STUCCO EXTERIORS
EXTERIOR WALL SIDING TRIM & FINISHES
FLASHING MEMBRANES PEEL & STICK
FLASHING for METAL ROOFS
FLASHING ROOF WALL DETAILS
FLASHING ROOF-WALL SNAFU
FLASHING SIDING DETAILS
FLASHING WALL DETAILS
FLASHING WINDOW DETAILS
FLASHING WOOD ROOF DETAILS
FLOOD DAMAGE ASSESSMENT, SAFETY & CLEANUP
FOOTING & FOUNDATION DRAINS
FOUNDATION CRACKS & DAMAGE GUIDE
GALVANIC SCALE & METAL CORROSION
GRADING, DRAINAGE & SITE WORK
GUTTERS & DOWNSPOUTS
HEAT TAPES & CABLES for ROOF ICE DAMS
HOUSE PARTS, DEFINITIONS
HUMIDITY LEVEL TARGET
ROOF ICE DAM LEAKS
INSECT INFESTATION / DAMAGE
MOISTURE CONTROL in BUILDINGS
MOISTURE PROBLEMS: CAUSE & CURE
MOLD DETECTION & INSPECTION GUIDE
ODORS GASES SMELLS, DIAGNOSIS & CURE
PAINT & STAIN GUIDE, EXTERIOR
PAINT FALURE, DIAGNOSIS, CURE, PREVENTION
PAINT FAILURE DICTIONARY
PAINT SURFACE PREPARATION
PORCH CONSTRUCTION & SCREENING
RETAINING WALL DESIGNS, TYPES, DAMAGE
RETAINING WALL GUARD RAILINGS
ROOF ARCHITECTURAL STYLES - PHOTO GUIDE
ROOF CLEANING RECOMMENDATIONS
ROOF COLOR RECOMMENDATIONS
ROOF DORMER TYPES - PHOTO GUIDE
ROT RESISTANT LUMBER
SIDING TYPES, INSTALLATION, DEFECTS
SINKHOLES, WARNING SIGNS
STAINS on & in BUILDINGS, CAUSES & CURES
STAINS on CONCRETE
STAIN DIAGNOSIS on BUILDING EXTERIORS
STUCCO WAll FAILURES DUE TO WEATHER
STUCCO WALL METHODS & INSTALLATION
STUCCO PAINT FAILURES
SURFACE GRADING, SITE DRAINAGE
THERMAL EXPANSION of MATERIALS
TREES & SHRUBS, TRIM OFF BUILDING
TRIM, EXTERIOR CHOICES, INSTALLATION
VAPOR BARRIERS & CONDENSATION in BUILDINGS
VENTILATION in BUILDINGS
WALL CONSTRUCTION BARRIER vs CAVITY
WATER BARRIERS, EXTERIOR BUILDING
WATER ENTRY in BUILDINGS
WINTERIZE A BUILDING
This article explains how gutters are attached to or supported on buildings, describing different sorts of gutter hangers and their pros and cons. We also discuss the recommended sized or capacity of roof gutters as a function of the size of roof area being drained. This article series discusses how to choose, install, diagnose & maintain roof gutters & downspouts, & roof drainage systems to prevent building leaks and water entry.
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Gutters won't survive the occasional extra weight of water, wet leaves, ice or snow that weigh down gutters when they have not been kept cleaned. But you can increase the durability of the building's roof gutter system by using enough connections to fasten the gutters to the structure so that those occasional extra stresses can be endured.
The sketch at left informs us that
Sketch courtesy of Carson Dunlop Associates.
Gutter attachments to the building vary by gutter materials and design as we illustrate below.
For metal gutters and most plastic gutters, the gutter is secured to the fascia board, or to structural members such as the tails of rafters, using
Sketch courtesy of Carson Dunlop Associates.
Below we show the type of gutter hanger used for half-round gutters (below left) and hidden gutter hangers (below-right).>
As Carson Dunlop Associates points out in their Home Reference Book
While "rules of thumb" for both gutter size and number of downspouts needed often are based simply on the length of roof edge that is being drained, this approach is flawed in that it fails to consider the total roof area that is being drained.
A roof that is very small in total area, even if very long, may get along just fine with a smaller 4-inch gutter, while a much larger roof area with the same length of roof eaves needs a 5-inch gutter or larger.
Also, as our (photographs below illustrate) odd roof shapes or complex multiple roof designs may end up sending a large volume of water from multiple surfaces into a relatively short gutter length that cannot possibly handle that volume. The result will be spillage by the building foundation and a high risk of a wet basement.
Some homeowners install larger gutters and leaders not because of difficulty handling the volume of water being drained, but because they believe that they'll have to clean the gutters less often. Nevertheless, it doesn't take a much larger handful of leaves or debris to clog a large downspout than a smaller one.
Before Installing a Larger Gutter System: Things to Check if Your Gutters are Overflowing
In sum, if the area of roof being drained is larger than usual and there are no defects in the gutter or downspout system, then if gutters still overflow during heavy rainfall you may need to install a larger gutter system.
Also see DRIP LINES INDICATE OVERFLOW This article describes ground-level visual clues that tell the story of the history and location of gutter overflows at a building.
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