Roofing Glossary
Every term you'll run into on an estimate, an inspection report, or an insurance scope — explained without the jargon.
Get a Free Roof InspectionRoofing estimates and insurance scopes are written in trade language, which makes it hard to compare two bids or understand what an adjuster wrote. These are the terms that come up most, in plain English.
| Term | What it means |
|---|---|
| Architectural shingle | A laminated, multi-layer asphalt shingle (also called dimensional). Thicker and more durable than 3-tab, and the most common residential choice in Central Texas. |
| Bruising | Hail impact that fractures the shingle mat beneath the surface without visibly puncturing it. Doesn't leak immediately, but shortens roof life significantly. |
| Class 4 | The highest impact-resistance rating in the standard test. Many Texas insurers offer a premium discount for Class 4 roofs. |
| Course | A single horizontal row of shingles. |
| Decking (sheathing) | The plywood or OSB structural surface the roof system is fastened to. Soft or rotted decking must be replaced before new roofing goes on. |
| Drip edge | Metal flashing at roof edges that directs water into the gutter and away from fascia. Frequently omitted on low bids. |
| Eave | The lower roof edge that overhangs the exterior wall. |
| Fascia | The vertical board along the eave that the gutter attaches to. |
| Flashing | Metal used to seal transitions and penetrations — chimneys, walls, valleys, vents. The most common leak source on any roof. |
| Granules | The mineral surface on asphalt shingles that shields the asphalt from UV. Granule loss is a primary aging indicator. |
| Ice and water shield | A self-adhering waterproof membrane applied in valleys and around penetrations for extra protection at high-risk points. |
| Nail pop | A fastener that has backed out over time, lifting the shingle above it and creating a small penetration. |
| Pipe boot | The rubber collar sealing around a plumbing vent pipe. Cracks under Texas UV and causes a large share of local leaks. |
| Pitch (slope) | The steepness of the roof, expressed as vertical rise over 12 inches of horizontal run — for example 6/12. |
| Rake | The sloped edge of a roof at a gable end. |
| Ridge | The horizontal peak where two roof slopes meet. |
| Ridge vent | Exhaust ventilation installed along the ridge, allowing hot attic air to escape. Requires matching soffit intake to function. |
| Soffit | The underside of the eave overhang, usually vented to provide intake air to the attic. |
| Square | The roofing industry unit of area: 100 square feet. Estimates are commonly priced per square. |
| Starter strip | The first course installed at the eave, providing a sealed edge that resists wind uplift. |
| Step flashing | Individual flashing pieces layered where a roof slope meets a vertical wall. Improper step flashing is a frequent leak cause on additions. |
| Tear-off | Complete removal of existing roofing down to the decking, as opposed to layering new shingles over old. |
| Underlayment | The water-resistant barrier between decking and shingles. Synthetic underlayment outperforms traditional felt. |
| Valley | Where two roof slopes meet in a V. Carries the highest water volume on the roof and is a high-risk leak area. |
| Ventilation (intake/exhaust) | The balanced airflow system through the attic. Inadequate ventilation traps heat, cooking shingles from beneath and shortening roof life in Texas. |
| Workmanship warranty | Coverage from the contractor for installation errors — distinct from the manufacturer's material warranty. |
The terms that matter most when comparing bids
If you only scrutinize a few line items, make them these: tear-off vs. overlay (layering over old shingles is cheaper and shorter-lived), underlayment type, whether flashing is new or reused, whether drip edge and starter strip are included, and whether ventilation is being corrected. Those five items account for most of the price gap between a low bid and a proper one.
The materials guide covers how those choices affect roof life, and the warranty guide explains what each type of coverage actually protects.
Comparing estimates?
Get a free inspection and a proposal that spells out every one of these line items — no vague bottom-line numbers.
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