Aluminum Gutters
Aluminum is a moderately priced and rust-resistant material popular with newer installations. It comes unfinished or factory-painted. The downside is that aluminum tends to leak at joints because the metal expands and contracts too much for sealant to hold permanently. It also dents easily.
Apron Flashing
A horizontal flashing installed where the top end of a roof slope meets a vertical projection, such as a chimney or parapet wall.
Box Gutter
A gutter not at an eave, typically at the base of two opposing roof slopes.
Cap flashing
The portion of the flashing attached to a vertical surface to prevent water from migrating behind the base flashing. 
Capping
A cover at the top of a gap that weatherproofs, typically at the ridge of a pitched roof.
Coping
the piece of material used to cover the top of a wall. It can be constructed from metal, masonry, or stone.
Copper
It is also used as a primary roof material as well as a flashing component. Copper turns a greenish color after being exposed to the weather for a length of time and appears in the middle of the Galvanic Series.
Copper Gutters
Copper is an expensive material that is strong, durable, rust-resistant and nearly maintenance-free. It will weather green unless you coat it with a clear sealant. It also needs to be installed by a professional.
Cornice
A horizontal projecting part that crowns the wall of a building.
Downspout
A pipe that carries rainwater from a roof gutter down to a drain or to the ground.
Downpipe
A pipe to carry roof water from gutters and roof catchments to drains or storage tanks.
Drainage
A system of gutters and drainpipes that carry water away from the foundation of a house.
Drip-Edge Extension
Prevents water from washing over the fascia eventually causing it to rot. If your fascia boards have black streaks on them, that usually means that the drip-edge is failing and the contractor may suggest adding an extension for an additional charge.
Dry Rot  
Wood rot caused by certain fungi. Dry rot can result from condensation build-up, roof leaks that go untended, or from other problems. Dry rot will not remain localized. It can spread and damage any lumber touching the affected area.
Eaves Gutter
A roof gutter attached at an eaves overhang.
Elbow
Pre-finished angled piece for directing water flow.
Fall (slope)
The slope of the roof or gutter, often expressed in degrees, or as a ratio of vertical height to horizontal distance (e.g. 1 in 20).
Fascia Board
The flat horizontal surface right below the edge of a roof.
Fascia Replacement
New gutters need a solid fascia surface upon which to be mounted. If rotted boards need to be replaced, there is a charge per linear feet. Fascia boards narrower than 3' in width must be built out to provide proper support for hanging your new gutters and require an additional charge per linear feet.
Felt  
A roofing sheet made of interwoven fibers. The fibers can be wood or vegetable for Organic Felts, glass fibers for fiberglass felts, polyester, or asbestos.
Flashing
Components used to seal the roof system at areas where the roof covering is interrupted or terminated. For example, pipes, curbs, walls, etc. all have special components that, when correctly installed, will help prevent moisture entry into the roof system or building.
Galvanized Gutters
Galvanized gutters are strong and inexpensive, although they can rust.
Gauge
The thickness or the gauge of the gutter is very important. Primary aluminum is the thickest and most consistent available. The gauges range from .019 to .032 inches. The optimal thickness is .032 inches so when buying aluminum gutters, insist on primary aluminum, which is the best.
Hanger
Flat strap that is installed under the roofing material that holds up the horizontal section of the gutter.
Hanging Flashing
Side, front, or back cover piece used to prevent entry of water between abutting surfaces and other gutters, flashings and soakers.
Ice Dams
Ice dams are formed when heat from the attic melts snow at the ridge or peak of the roof causing an "avalanche" of snow and ice to overflow the gutters. The melted water can then back up under the shingles and work its way into the property.
Primer
A material that is applied to a surface in order to increase that surface's ability to adhere to or work in conjunction with a subsequently applied material.
PVC Gutters
PVC, or vinyl, is a tough, maintenance-free, moderately priced material popular with newer installations. Vinyl gutter systems are favored by some because they are lightweight and can be easily snapped or glued together. However, vinyl gutters are not recommended for hot, sunny climates where they tend to become brittle, crack and fail quickly.
Rainhead
A box-shaped receptacle sometimes used between gutters and downpipes to provide an external overflow point.
Run Height
The height (in stories) at which each gutter run will be located (1st story, 2nd story etc.). This is used to determine the length of downspout needed.
Run Length
A straight section of gutter mounted against the fascia board. It is measured in linear feet, which measures the same as regular feet.
Seamless Gutter Machine
The chosen gutter material is rolled through the forming machine to create a continuous piece of gutter that is custom sized to your home.
Shoe
A fitting used in a downpipe, to change direction of the downpipe by about 45 degrees.
Soaker (gutter)
A small gutter located on the upper side of a chimneystack.
Soaker (flashings)
A side cover piece extended over a roof cover and over-flashed with a hanging flashing. Formed metal designed to weatherproof the perimeter of roof protrusions or penetrations.
Soaker flashings are usually positioned under rather than over the surrounding metal roof.
Soffits
Soffits are vents under the roof overhang that allow your attic to breathe.
Vulcanize
To improve the strength, resiliency, and freedom from stickiness and odor of rubber, for example, by combining with sulfur or other additives in the presence of heat and pressure.
Valley Gutter
A gutter at the bottom intersection of two sloping roofs (also called a valley flashing).
Valley Boards
Timber or profiled metal laid under a valley gutter to support it.
Water Diverter
Similar to gutters, a water diverter is a piece of metal that helps to control the flow of water as it drains from the roof.
Water Trough - The area in a valley where water runs. Usually referred to with open valley configurations.
Wind Clip, A clip that slips over the ends of tile, slate and other steep slope roofing materials in order to help prevent wind uplift damage. Gutters and Downspouts, Conshohocken 19428 The Action Info Contractor Network, Working Harder, Working Economically. . Exton PA, We are seasoned contractor trades - Our services begin with all your answers before you spend Gutters and Downspouts for zip code 19341.