Roof Hail and Wind Insurance Discounts
Class 3 and Class 4 impact ratings, Texas PC068, WPI-8 windstorm documentation, FORTIFIED roof details, and nailing patterns to ask for before the crew leaves.
The discount is not just the shingle. It is the rating, installation, photos, and paperwork.
Insurance discounts for new roofs can be real, but the paperwork matters. A contractor saying "Class 4" is not enough if the carrier needs labels, forms, photos, or wind-mitigation proof.
Plain English
Can roof paperwork help with insurance cost or storm proof?
Some roofs need product labels, rating paperwork, photos, and installation proof before any discount or claim question is useful.
Start here: Save the roof product and install documents before final payment.
Quick answer
The discount is not just the shingle. It is the rating, installation, photos, and paperwork.
Key points
- ▸ Class 3 and Class 4 are impact-resistance ratings, often under UL 2218; Class 4 is usually the highest impact credit.
- ▸ In Texas/TWIA contexts, TDI Form PC068 documents impact-resistant roof installation after the roof is installed.
- ▸ Coastal Texas windstorm eligibility can involve WPI-8 or WPI-8E windstorm certificates, separate from impact-resistant shingle paperwork.
- ▸ Wind mitigation depends on attachment: six nails per shingle where high-wind instructions require it, sealed roof deck, drip edge/starter details, vents, and roof deck nailing.
- ▸ For FORTIFIED-style re-roofs, IBHS guidance calls for 8d ring-shank deck nails at 6 inches on center, tighter at gable ends, plus documentation photos.
Hail discount: Class 3 and Class 4
Ask your carrier which impact rating qualifies before you choose the shingle. Some insurers give credit for Class 3 and Class 4; others only care about Class 4; some apply the credit only to the wind/hail part of the premium; some attach a cosmetic-damage exclusion.
In Texas, TDI says impact-resistant roofing credits depend on roofing materials tested by an accepted standard and classified as Class 1, 2, 3, or 4. TDI also says Class 4 receives the highest premium credit, but the amount is set by the insurance company.
For TWIA, the roof covering must have proper labeling, including impact classification, manufacturer, year manufactured, and brand. After installation, the contractor completes TDI Form PC068, the Impact-Resistant Roofing Installation Form.
Wind discount: do not confuse material rating with installation
Hail resistance is a product rating. Wind resistance is an installed system. The roof has to stay attached and shed water when wind gets under edges, around penetrations, and through vents.
For high-wind work, ask about:
- six nails per asphalt shingle when the manufacturer high-wind installation or wind program requires it,
- ASTM D7158 Class H or ASTM D3161 Class F wind-rated asphalt shingles where required,
- starter strip adhesion at eaves and rakes,
- drip edge fastening,
- sealed roof deck,
- wind/rain-rated attic vents,
- roof-to-wall connections in hurricane markets,
- WPI-8 or WPI-8E certification for Texas coastal windstorm areas when applicable.
FORTIFIED-style nail documentation
IBHS FORTIFIED roof guidance is stricter than a normal shingle swap. The re-roof checklist calls for removing existing roofing, replacing damaged wood, re-nailing the roof deck with 8d ring-shank nails at 6 inches on center, and 4 inches on center at gable ends. It also requires documentation photos of the fastener package and installed spacing.
For asphalt shingles, the checklist calls for high-wind-rated shingles installed with six nails per high-wind instructions. It also calls for sealed roof deck options, proper flashing, drip edge details, adhered starter strips, and rated vents.
Category 3 and Category 4 wind context
Category 3 hurricane winds are 111-129 mph sustained; Category 4 is 130-156 mph sustained. Those wind categories are not the same thing as Class 3/Class 4 hail ratings. A Class 4 impact shingle helps with hail impact; it does not by itself prove the roof deck, edges, vents, and roof-to-wall load path are ready for hurricane wind.
What to collect before final payment
Get the paperwork while the contractor is still motivated:
- invoice showing exact shingle manufacturer, product line, color, and impact class,
- photos of product packaging and labels,
- completed TDI PC068 or carrier-specific impact-resistant roofing form,
- permit documents and final inspection where required,
- WPI-8/WPI-8E certificate in Texas windstorm areas if applicable,
- photos of deck nailing before underlayment covers it,
- photos of sealed roof deck or taped seams,
- photos of drip edge, starter strip, ridge vent, pipe boots, chimney flashing, and skylight details,
- warranty registration confirmation.
If your agent says a discount exists, ask what documents they need and when they need them. Do that before shingles are installed, not after the packaging is gone.
Sources
Related
Frequently asked questions
› Is Class 4 the same as Category 4? Trust & accuracy
No. Class 4 usually means impact resistance under a test such as UL 2218. Category 4 is a hurricane wind category. A Class 4 shingle can help with hail discounts, but hurricane wind mitigation depends on installation and structure.
› What form documents an impact-resistant roof in Texas?
TDI Form PC068 is the Impact-Resistant Roofing Installation Form used for Texas/TWIA impact-resistant roofing documentation. Private carriers may use their own forms.
› What nail pattern should I ask for?
For shingle wind resistance, ask whether the manufacturer high-wind installation requires six nails per shingle. For FORTIFIED-style roof deck attachment, IBHS re-roof guidance calls for 8d ring-shank nails at 6 inches on center, tighter at gable ends, with photos before the deck is covered.
› How should I use a property guide with a calculator? How-to
Use the guide to frame what could be missing, then use the calculator or estimator to put a range around the decision. The number is useful only if the scope, proof, exclusions, timeline, and professional verification are clear.
› What mistake do HVAC guides help avoid? Troubleshooting
HVAC guides help avoid treating a replacement quote as the only option before diagnosis, duct condition, equipment compatibility, electrical work, refrigerant path, warranty terms, and cheaper repair options are clear. A fast quote can still be incomplete if it does not explain what failed, what can be reused, and what is excluded.