TruDefinition
Duration Shingles
The nailing strip is what separates these from a standard architectural shingle — and in a Florida wind zone, the nailing strip is where a roof either holds or doesn't.
The Nailing Strip
Every architectural shingle has a nailing zone. Duration has a woven fabric strip laid into it — Owens Corning call it SureNail, and it's the only meaningful difference between this and a standard architectural shingle.
Here's why it matters in Florida. Shingles almost never fail in the middle of the field. They fail at the nail — the fastener pulls through the mat in high wind, and once one goes the neighbouring ones follow.
The fabric strip does two things. It gives a wider target, so a nail placed slightly high or low still lands in the reinforced zone. And it gives the mat something tougher to hold onto, so the fastener has to tear fabric rather than just asphalt.
On a roof that's going to see 130 mph gusts, that's not marketing. It's the difference between a fastener that holds and one that doesn't.
The woven strip in the nailing zone
And the Part Owens Corning Won't Tell You
A wider nailing zone only helps if the nails go in it. The strip makes correct placement easier — it doesn't make incorrect placement acceptable.
We still install six nails per shingle to Florida code, still hand-place rather than relying on a gun's rhythm, and still check the courses as they go on. A Duration roof installed badly performs worse than a basic shingle installed well.
Duration or GAF
Timberline HDZ?
These are the two shingles we install most, and almost everyone choosing shingle is deciding between them. Here's the honest comparison.
| Owens Corning Duration | GAF Timberline HDZ | |
|---|---|---|
| Nailing zone | SureNail — woven fabric strip laid into the zone | LayerLock — a wider engineered zone, no fabric strip |
| Colour | TruDefinition blends — more contrast, more depth between granule shades | More muted, more uniform across the roof |
| Appearance | Reads with more variation up close | Reads more consistent from the street |
| Availability | Widely stocked in Florida | Widely stocked in Florida |
| Cost | Close enough that it should not decide it | |
Both are excellent shingles from serious manufacturers. Anyone telling you one is dramatically better than the other is either selling what they have in the yard or repeating a rep's talking points.
How We'd Actually Help You Choose
Look at both on a roof, not in a brochure. We'll show you houses in your area with each and let you see them at the distance you'll actually be looking at yours.
Then choose on colour. Not on the technical comparison — because if we install either one correctly, you will not be able to tell the difference in twenty years.
Colours
TruDefinition uses a wider spread of granule shades in each blend, which gives more contrast and depth than a standard blend. It's noticeable up close and subtle from the street.
Swatch colours are approximate and shown on a screen. Granule colour shifts considerably with light, angle and time of day — we bring physical samples to every estimate, and we'll hold them against your walls and trim before you decide.
The Shingle Is
the Least of It
Owens Corning market a "Total Protection Roofing System" — every component from the same manufacturer. It's sound thinking, and here's what it actually means on your roof.
Underlayment
Self-adhered peel-and-stick rather than felt. If wind takes shingles off, this is the only thing between weather and your decking. It's also what qualifies you for the state grant programme and improves your wind mitigation report. More on underlayment →
Starter strip and hip & ridge
Purpose-made starter at the eaves and rakes, not cut-up shingles. The edges are where wind gets under a roof first, and it's the corner most commonly cut on a cheap quote.
Ventilation
Intake at the soffits and exhaust at the ridge. Florida attic temperatures exceed 150°F without it, and that heat cooks shingles from underneath. A 25-year roof can be finished in 15 for this reason alone — so we assess it on every estimate rather than assuming it's adequate.
Ice and water at the details
Valleys, penetrations and roof-to-wall transitions get sealed membrane regardless of the covering. This is where roofs actually leak.
Ask any contractor to itemise all four. If the quote just says "shingle roof," you have no idea what you're buying.
What Actually
Happens
Tear off to the deck
Everything comes off. We don't lay over an existing roof — you can't inspect decking you can't see, and Florida code is specific about it.
Deck inspected and repaired
Every sheet checked, soft or delaminated material replaced. Priced per sheet before we start, so the final invoice holds no surprises.
Underlayment and secondary water resistance
Self-adhered, sealed at the deck. This is the layer that decides whether losing shingles in a storm becomes a flooded house.
Six nails per shingle, in the strip
Florida code minimum, hand-placed. The nailing strip makes correct placement easier — it doesn't do it for you.
Edges, valleys and penetrations detailed
Drip edge sequenced correctly, valleys lined, boots and collars replaced rather than reused. Roofs fail at transitions.
Inspected, swept, documented
Permit inspection passed, magnet sweep every evening, and your file handed over — photographs, permit records, wind mitigation paperwork, and your warranty registered in your name.
What's Actually
Covered
Roofing warranties are worth understanding before you rely on one, because the headline number rarely means what people assume.
Manufacturer warranty
Covers the shingles themselves against manufacturing defects. Owens Corning offer a limited lifetime warranty on Duration for the original owner, with the strongest coverage in the early years and reducing after that. It does not cover installation.
Workmanship warranty
Ours, covering how the roof was installed. In practice this is the one that matters — the overwhelming majority of roof failures are installation, not manufacturing. Ours is written into your contract, not implied.
On Extended Warranties
Owens Corning offer enhanced warranty programmes that cover both materials and labour, available through contractors holding the corresponding certification level.
Ask us directly what we can offer on your roof, and ask any other contractor the same. Then ask to see it in writing from the manufacturer rather than described verbally.
A warranty you can't produce a document for isn't a warranty.
Duration FAQs
What is SureNail and does it actually matter?
A woven fabric strip laid into the shingle's nailing zone. It matters because shingles almost never fail in the middle of the field — they fail at the fastener, which pulls through the mat in high wind. The strip gives a wider target for correct placement and something tougher for the nail to hold. In a Florida wind zone that's a genuine advantage, not a marketing point. But it only helps if the nails actually go in it — installation still decides the outcome.
Duration or GAF Timberline HDZ — which should I choose?
Both are excellent shingles from serious manufacturers, and the price difference is small enough that it shouldn't decide it. Duration's TruDefinition blends carry more colour contrast; GAF reads more uniform from the street. Choose on how it looks on a real roof in your area, not on the spec sheet — if either is installed correctly, you won't be able to tell the difference in twenty years. Compare with GAF Timberline HDZ.
How long will a Duration roof last in Florida?
20 to 25 years for a properly installed architectural shingle in this climate — less if the attic ventilation is inadequate. Florida attic temperatures exceed 150°F when intake is blocked, and that heat cooks shingles from underneath. We assess ventilation on every estimate because it can take five years off a roof on its own. Anyone quoting you "lifetime" on a Florida shingle roof is quoting a warranty term, not a service life.
What wind rating do these carry?
Duration carries a high wind rating when installed to the manufacturer's enhanced specification — which means the correct nail count, correct placement, and correct starter and hip-and-ridge products. The rating is conditional on the installation, not a property of the shingle in the bundle. We confirm the current Florida Product Approval for the exact configuration we're quoting at your address.
Does the colour affect how hot my house gets?
Somewhat, though considerably less than most people expect — attic ventilation and insulation matter far more than shingle colour. Lighter shades reflect a little more, and Owens Corning offer reflective options in some lines if that's a priority. If cooling cost is the actual concern, fixing your ventilation will do more than changing the colour will.
Can I just replace part of my roof?
Sometimes. Florida's code generally permits localised repair affecting under 25% of the roof area in a twelve-month period. The practical problem is matching — granule blends shift between production runs, so a repaired section on an aged roof rarely disappears. On a newer roof it's often worth doing. We'll tell you honestly which situation you're in.
Do you bring samples?
Yes, to every estimate. Screen colours are unreliable and granule colour shifts considerably with light, angle and time of day. We'll hold physical samples against your walls and trim, and where we can, show you completed roofs nearby so you can see the colour at the distance you'll actually view yours from.
Related
The other shingle we install most: GAF Timberline HDZ. How a shingle roof is actually installed: shingle roof installation. And the layer beneath that decides how long it lasts: underlayment and secondary water resistance.
Considering something other than shingle? Metal runs roughly twice the life at materially higher cost, and concrete tile lasts fifty years if your structure can carry it. Not sure where your current roof stands? Book a free roof inspection.
See It on a
Real Roof First
Free estimate with physical samples, an honest comparison against the GAF, and line-item pricing with decking priced per sheet before we start.