The Homeowner's
Roofing Glossary
Decode the jargon. From insurance terms to roofing components, we've compiled everything you need to understand your roof and make confident decisions.
A
Actual Cash Value (ACV)
The value of your roof at the time of damage. It is calculated by taking the Replacement Cost Value (RCV) and subtracting depreciation based on the roof's age and condition. This is typically the amount of the first check you receive from your insurance company.
Understanding ACV is critical because it dictates your initial out-of-pocket costs before repairs begin. If you have an ACV-only policy, you will be responsible for the depreciation amount yourself.
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Insurance Claims GuideAdjuster
A representative sent by your insurance company to inspect your property, assess the storm damage, and determine the initial payout amount.
The adjuster's assessment directly impacts whether your claim is approved or denied. Having a professional roofing contractor present during the adjuster meeting ensures all damage is properly documented.
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Insurance Claims GuideAlligatoring
A pattern of cracking on the surface of older, flat or low-slope roofs that resembles alligator skin, indicating the material has lost its elasticity.
Once a commercial or flat roof begins alligatoring, it is highly susceptible to water intrusion and often requires a full replacement rather than a simple repair or coating.
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Commercial Roofing GuideArchitectural Shingles
Premium, multi-dimensional asphalt shingles that offer superior wind resistance, longevity, and a highly textured appearance compared to standard 3-tab shingles.
These are the standard for modern residential roof replacements in Central Alabama due to their excellent balance of cost, aesthetic appeal, and durability against severe weather.
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Roofing Materials GuideB
Blistering
Bubbles or pimples on the surface of asphalt shingles, usually caused by trapped moisture or poor attic ventilation. They can pop and lead to premature failure.
Blistering is often mistaken for hail damage. However, blistering is a manufacturer defect or ventilation issue, which is typically not covered by storm damage insurance.
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Roof Maintenance GuideC
Creased Shingle
A shingle that has been lifted by high winds and folded backward, creating a permanent crease. This breaks the shingle's seal and compromises its ability to shed water.
Creased shingles are a primary indicator of wind damage and are frequently the basis for wind-related insurance claims following severe Alabama thunderstorms.
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Storm Damage Recovery GuideD
Date of Loss
The exact date the storm damage (hail, wind, or tree impact) occurred. You must report claims within a specific timeframe from the date of loss.
Insurance companies require a specific date of loss to verify that a storm actually occurred in your area. Waiting too long to file can result in a denied claim.
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Insurance Claims GuideDecking (Sheathing)
The wooden boards (usually OSB or plywood) attached to the roof trusses or rafters. This forms the foundation that the rest of your roofing system is nailed into.
If your roof has been leaking for a long time, the decking may rot. Rotten decking must be replaced during a roof replacement to ensure the new shingles hold securely.
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Roof Replacement GuideDeductible
The out-of-pocket amount you are responsible for paying before your insurance coverage kicks in. In Alabama, it is illegal for a roofing contractor to waive, absorb, or pay your deductible.
Your deductible is the only portion of an approved insurance replacement that you are legally required to pay. Be wary of contractors offering to 'eat' your deductible, as this constitutes insurance fraud.
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Insurance Claims GuideDrip Edge
Metal flashing installed along the edges of the roof (eaves and rakes) to help water drip clear of the underlying fascia and protect the wood from rotting.
Drip edge is now required by modern building codes. If your old roof didn't have it, your insurance company may be required to pay for its installation under 'code upgrade' coverage.
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Roof Replacement GuideF
Fascia
The horizontal boards attached to the lower ends of the roof trusses, where gutters are typically installed.
Rotting fascia is often a sign of failing drip edge or clogged gutters causing water to back up behind the gutter system.
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Roof Maintenance GuideFlashing
Metal pieces installed at intersections, valleys, edges, and around roof penetrations (like chimneys and skylights) to direct water away and prevent leaks.
Flashing failures account for a vast majority of roof leaks. Reusing old flashing during a roof replacement is a common corner-cutting tactic that leads to premature failure.
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Roof Repair GuideG
Granule Loss
The shedding of the protective mineral granules on the surface of asphalt shingles. While some loss is normal over time, excessive loss due to hail or aging exposes the asphalt to UV rays.
Significant granule loss in gutters after a storm is a strong indicator of hail damage and warrants a professional inspection before leaks develop.
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Storm Damage Recovery GuideI
Ice & Water Shield
A specialized, self-sealing waterproof membrane installed in the most vulnerable areas of the roof, such as valleys, around chimneys, and along the eaves, to prevent water intrusion.
This secondary barrier is critical in Central Alabama to protect against wind-driven rain and water backing up in valleys during heavy downpours.
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Roof Replacement GuideM
Manufacturer Warranty
A guarantee provided by the company that makes the roofing materials (like Owens Corning or CertainTeed) covering defects in the product itself.
Manufacturer warranties do not cover installation errors. To ensure full coverage, you must hire a certified contractor who installs the roof exactly to the manufacturer's specifications.
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Roof Replacement GuideN
Nail Pop
When a roofing nail backs out of the decking over time, pushing up on the shingle above it and potentially causing a leak.
Nail pops are often caused by changes in temperature and humidity in poorly ventilated attics. They require prompt repair to prevent water from seeping through the hole.
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Roof Repair GuideP
Peril
The specific cause of damage or loss, such as wind, hail, fire, or lightning. Your insurance policy outlines which perils are covered.
Understanding your covered perils is essential. For example, some policies exclude wind or hail damage, or apply a separate, higher deductible for those specific events.
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Insurance Claims GuidePipe Boot
A specialized piece of flashing (often made of rubber and metal) that seals the area where plumbing vent pipes exit the roof. Pipe boot failures are one of the most common causes of roof leaks.
The rubber seal on a pipe boot typically dry rots in the Alabama sun after 7-10 years, long before the shingles themselves fail. Learn how pipe boots fail and how they're repaired in our <Link to='/resource-center/why-pipe-boots-fail-and-how-to-fix-them' className='text-primary hover:underline font-semibold'>Pipe Boot Repair Guide</Link>.
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Roof Repair GuidePitch
The angle or steepness of the roof, calculated by how many inches the roof rises vertically for every 12 inches of horizontal run (e.g., a 6/12 pitch).
A roof's pitch determines what materials can be safely installed. Very low-slope roofs cannot use standard shingles and require specialized flat roofing membranes.
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Commercial Roofing GuidePonding Water
Water that remains on a flat or low-slope roof for more than 48 hours after rain. Ponding accelerates roof deterioration and increases the risk of leaks.
Ponding water is a primary concern for commercial properties and often indicates failing insulation or clogged roof drains that need immediate attention.
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Commercial Roofing GuideR
Recoverable Depreciation
The difference between the Replacement Cost Value (RCV) and the Actual Cash Value (ACV). Once your roof is fully replaced and the final invoice is submitted, the insurance company releases these funds.
This two-check system is designed to prevent homeowners from pocketing the ACV check without actually completing the roof repairs.
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Insurance Claims GuideReplacement Cost Value (RCV)
The total cost to replace your roof with materials of similar kind and quality at current market prices, without deducting for depreciation.
An RCV policy is highly recommended because it ensures your insurance will cover the full cost of a new roof (minus your deductible), regardless of how old the damaged roof was.
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Insurance Claims GuideRidge Cap
Specialized shingles designed to fold over the peak (ridge) of the roof, sealing the joint where the two slopes meet.
Ridge caps take the brunt of high winds. Missing ridge caps are a common form of storm damage and can allow significant water intrusion if left unrepaired.
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Storm Damage Recovery GuideRoof Over (Overlay)
Installing a new layer of shingles directly over an existing layer. This is generally not recommended as it hides decking issues and adds excessive weight.
Most manufacturers will void their warranties if their shingles are installed as an overlay. A full tear-off is the only way to guarantee a long-lasting roofing system.
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Roof Replacement GuideS
Soffit
The exposed underside of the roof overhang. It often contains intake vents to allow fresh air into the attic.
Blocked soffit vents prevent proper attic ventilation, leading to extreme heat buildup, higher energy bills, and premature shingle failure.
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Roof Maintenance GuideSquare
A roofing measurement term. One square equals 100 square feet of roof area (a 10' x 10' area).
Contractors and insurance adjusters price materials and labor by the square, not by the individual square foot.
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Roof Replacement GuideSupplement
An additional request for funds submitted to the insurance company when hidden damage is discovered during the roof replacement, or when the initial adjuster's estimate missed required materials.
Supplements are a normal part of the insurance process. An experienced roofing contractor will handle the supplement process directly with your insurance company to ensure all costs are covered.
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Insurance Claims GuideT
Tear-Off
The process of completely removing the old roofing materials down to the bare wooden decking. This allows the contractor to inspect the decking for rot or damage.
A complete tear-off is essential for a proper roof replacement. It ensures a clean, solid foundation for the new roofing system and is required for most manufacturer warranties.
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Roof Replacement GuideU
Underlayment
A water-resistant or waterproof barrier installed directly over the roof decking, under the shingles. Modern roofs use high-performance synthetic underlayment for better protection.
Synthetic underlayment is vastly superior to traditional felt paper, as it won't tear easily and provides a much stronger secondary barrier against water intrusion.
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Roofing Materials GuideW
Workmanship Warranty
A guarantee provided by the roofing contractor covering errors in the installation process.
A strong workmanship warranty protects you from leaks caused by improper nailing or flashing installation, which are not covered by the manufacturer's material warranty.
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Roof Replacement GuideStill Have Questions?
You don't have to be a roofing expert to get a premium roof. Schedule a free inspection and our team will walk you through everything, step by step.