Glossary

A simple, easy-to-understand guide to roofing materials, components, insurance terms, and essential maintenance for homeowners.

A
ACV (Actual Cash Value)
The roof’s value after depreciation is deducted; the amount insurance may pay without full replacement coverage.

Asphalt Shingles
The most popular U.S. roofing material, made of fiberglass coated in asphalt with protective mineral granules.

B
Blistering
Raised bubbles on shingles caused by trapped moisture, heat, or manufacturing defects.

C
Chimney Flashing
Metal installed around the chimney base to block water from leaking into your home.

Clay Tile Roofing
Durable roofing made from baked natural clay, often used in warm climates; fire-resistant and long-lasting.

Common Roofing Problems
Typical issues like leaks, granule loss, algae growth, cracked or curling shingles; early repairs help avoid major damage.

Composite/Synthetic Roofing
Man-made roofing materials that mimic slate, wood, or tile; lightweight, durable, and often impact-resistant.

Condensation
Moisture buildup inside attic spaces that can lead to mold, mildew, and wood rot.

Contingency Agreement
A contract stating the homeowner agrees to hire the contractor if insurance approves the roofing work.

Cricket
A small peaked structure behind chimneys to redirect water and prevent ponding.

D
Decking (Roof Deck)
The base wooden layer (usually plywood or OSB) that roofing materials are installed onto.

Deductible
The portion of an insurance claim you must pay out of pocket before coverage applies.

Drip Edge
Metal flashing at roof edges that directs water away from fascia boards and prevents leaks.

E
Eaves
Roof edges that extend beyond the home’s exterior walls.

Eave Protection
Waterproof materials installed at the eaves, often referring to Ice & Water Shield, to prevent leaks from ice dams.

F
Felt Paper
Traditional asphalt-saturated underlayment installed beneath shingles for added moisture protection.

Flashing
Thin metal used around roof openings like vents and chimneys to seal out water.

G
Gable
The triangular section of wall between sloping sides of a pitched roof.

Granules
Colored mineral particles on asphalt shingles that provide UV protection and durability.

Gutter
Channels mounted at roof edges to collect and direct rainwater safely away from the home’s foundation.

H
Hail Damage Roof Repair
Fixing roofing materials damaged by hail, including bruised shingles and dislodged granules, to prevent future leaks.

Hip Roof
A roof with slopes on all four sides, meeting at a ridge or point.

Hail Damage
Destruction caused by hailstones impacting shingles, flashing, and other roofing components.

I
Ice & Water Shield
A self-adhering waterproof membrane installed in vulnerable roof areas to prevent leaks from ice dams.

Ice Dam
Ice buildup along the roof edge that traps melting snow, leading to water intrusion under shingles.

Impact Resistant Roofing
Roofing materials designed to withstand damage from hail, debris, and other impacts, helping to protect the roof and extend its lifespan.

L
Leaks
Water entering the home through damaged or missing roofing components like shingles or flashing.

M
Maintenance Tips
Routine tasks like inspecting for damage, clearing gutters, removing debris, checking flashing, and scheduling professional inspections.

Metal Roofing
Durable roofing made of steel, aluminum, or copper; available as panels or shingles; long lifespan and weather-resistant.

Moss Growth
Moisture-loving vegetation that grows on roofs, retaining water and causing potential long-term damage.

N
Nail Pop
A roofing nail that lifts over time, potentially loosening shingles and allowing water intrusion.

P
Pitched Roof
A sloped roof designed to shed rain, snow, and debris efficiently.

Plumbing Vent
A pipe extending through the roof to equalize air pressure in the home’s plumbing system.

R
RCV (Replacement Cost Value)
The full cost to replace the roof with new materials, with no depreciation deducted by insurance.

Residential Roofing
Roof systems for homes, commonly asphalt shingles but also including metal, cedar shake, slate, or tile for style and protection.

Rafter
The angled wooden beams that support the roof deck and structure.

Ridge
The highest horizontal line where two sloping roof sections meet.

Ridge Vent
A vent running along the roof ridge to release warm, moist attic air.

Roof-Related Processes & Insurance
Roof Inspection
A professional roof evaluation for damage, aging, or issues that may require repairs or insurance claims.

Roof Insurance Claims
The process of filing with your insurer to pay for storm, hail, or wind damage per your policy coverage.

Roof Repair
Fixing specific problem areas such as leaks, missing shingles, or flashing issues without fully replacing the roof.

Roof Rejuvenation
Application of roof sealants or coatings that restore flexibility, seal cracks, and extend shingle lifespan.

Roof Replacement
The complete removal of old roofing down to the deck, followed by installation of a new roofing system.

S
Scope of Loss
The insurance adjuster’s detailed report outlining the damage found and what repairs are covered.

Shake Roofing
Thicker, hand-split or rough-cut wood shingles, typically cedar, offering a rustic appearance.

Slate Roofing
Natural stone roofing known for its classic look, fire resistance, and lifespan often exceeding 100 years.

Skylight
A roof-installed window allowing natural light into the home.

Soffit
The underside of roof overhangs, often vented to promote attic airflow.

Snow Guard
Devices mounted on roofs to prevent sudden snow or ice slides in cold climates.

Starter Strip
The first row of shingles installed at the roof’s edge, securing and supporting higher shingle rows.

Storm Damage Repair
Restoration of roofs, siding, or gutters following wind, hail, or heavy rain damage.

T
Tear-Off
The process of removing existing roofing materials before installing new shingles or roofing systems.

Tile Roofing
Roofing made from shaped clay or concrete tiles, commonly used on Mediterranean or Spanish-style homes.

TPO Roofing
A flexible, single-ply membrane used mostly on flat commercial roofs but occasionally on residential flat roofing.

U
Underlayment
A waterproof or water-resistant layer beneath shingles to protect the roof deck from leaks and moisture damage.

V
Valley
The trough where two roof slopes meet, directing rainwater toward gutters.

Ventilation
Attic airflow systems that prevent moisture buildup and reduce heat accumulation.

Vent Pipe
Plumbing exhaust pipe that exits through the roof to balance pressure in drain systems.

Warping
Roofing material distortion caused by moisture exposure or extreme temperatures.

W
Warranty Types
Manufacturer Warranty: Covers material defects and premature product failure.
Workmanship Warranty: Covers errors made during roof installation, typically provided by the contractor.

Wood Shingles
Machine-cut wood roofing made from cedar or other rot-resistant species, offering a uniform appearance.

Woven Valley
Shingle installation technique where courses overlap in valleys for continuous water protection.

Z
Z-Flashing
Z-shaped metal flashing that diverts water away from siding transitions or roof-wall intersections.