Roofing Glossary
The plain-English roofing glossary
Thirty roofing terms explained the way we'd explain them across your kitchen table — so your estimate reads like English, not jargon.
Roofing estimates are full of words nobody uses anywhere else — fascia, rake, cricket, square. We think you should understand every line of a bid before you sign it, whether it's ours or a competitor's. So here's every term we're likely to write on your estimate or say on your roof, defined in a sentence and explained for how it behaves in Douglas County weather specifically. For bigger questions, our guides go deeper, and the FAQ covers the questions we hear most.
Algae-Resistant Shingles
Copper-granule shingles that fight the streaks and moss our climate breeds.
Architectural Shingle
The thicker, longer-lived laminated shingle most new roofs here use.
Class A Fire Rating
The top roof fire rating — and the one Oregon wildfire code favors.
Counter-Flashing
The metal cap that closes off chimney and wall flashing joints.
Cricket
The small peaked diverter that splits water around a chimney.
Decking
The plywood or OSB base your whole roof is nailed to.
Dormer
A windowed structure with its own little roof — and lots of flashing.
Downspout
The pipe that carries gutter water down and away from the house.
Drip Edge
Edge metal that steers runoff into the gutter, not behind it.
Eave
The lower roof edge where gutters hang — and problems start.
Fascia
The trim board at the roof edge your gutters fasten to.
Granules
The mineral armor coating on asphalt shingles.
Gutter Apron
Flashing that bridges the roof edge into the gutter.
Ice & Water Shield
Self-sealing membrane protecting valleys, eaves, and penetrations.
Kick-Out Flashing
The little diverter at roof-wall corners that saves your siding.
Low-Slope Roof
Nearly flat roof sections and the materials they demand.
Pipe Boot
The flexible seal around plumbing vents — a top leak source.
Rake
The sloped edge at a gable end, where wind attacks first.
Ridge Cap
The purpose-made shingles that seal the peak of the roof.
Ridge Vent
The exhaust vent along the peak that lets your attic breathe.
Roof Pitch
How roof steepness is measured — and why it changes the price.
Roofing Square
The 100-square-foot unit roofers measure and price by.
Soffit
The vented underside of the overhang — your attic's air intake.
Splash Block
The pad that carries downspout water away from the foundation.
Standing Seam
The premium hidden-fastener metal roof built for decades.
Starter Strip
The first course that locks shingle edges down against wind.
Step Flashing
L-shaped metal pieces sealing roof-to-wall joints, course by course.
Three-Tab Shingle
The older, flatter, budget shingle style — and its trade-offs.
Underlayment
The backup water barrier between shingles and the wood deck.
Valley
The channel where two roof planes meet and water concentrates.
Still see a term we haven't covered?
Call and ask — explaining the job in plain English is half the job. Free estimates all over Douglas County.