You're getting quotes for a new roof, and one contractor keeps talking about "upgraded" wind and hail protection like it's the whole reason to hire them. Before you decide whether that upgrade is worth paying for, it helps to know what Maryland's building code already covers on a standard, code-minimum roof — and where that minimum actually stops. This guide separates what a permit inspector will check from what's a genuine, optional step up.
Confusing "code-minimum" with "storm-proof" is an expensive mistake in either direction. Some homeowners get talked into paying extra for protection the code already includes for free; others skip a real upgrade because they assume anything beyond the permit inspection is just an upsell. Knowing the actual dividing line lets you ask sharper questions and spend your money on what genuinely changes how your roof performs.
Maryland's Code Doesn't Come From Your Contractor
A roofer can describe their own workmanship however they like, but the baseline rules for a new roof in Maryland don't come from a sales pitch — they come from the state. The Maryland Building Performance Standards requires each jurisdiction in Maryland to adopt the International Building Code (IBC), the International Residential Code (IRC), and the International Energy Conservation Code (IECC).1 Every county and municipality in Maryland is building on the same statewide floor, even though each one layers on its own local amendments.
That floor moves on a schedule, not on a whim. The State of Maryland adopted the 2021 IECC on May 29, 2023,1 and all local jurisdictions were required to amend and adopt the new code for local code enforcement by May 29, 2024, 12 months after state adoption.1 If your contractor talks about "code" like it's a fixed, static thing, that's a sign they haven't kept up with it themselves.
Wind Design Is Tied to Where You Live
Here's the part a lot of homeowners don't realize: wind resistance isn't a single national number — it's tied to the specific wind zone your county sits in. Worcester County, on the Atlantic coast, points to the County's inclusion in the 125 MPH Wind Speed Zone2 as the reason its wind design is stricter than an inland county's might be.
The same county's own guidance is also honest about the limits of any design number: winds can far exceed the 120 MPH Wind Speed designated for this area2, which is a reminder that meeting the code minimum isn't the same as being storm-proof.
Tie-Downs and Fastening Are Part of the Code Too
Wind resistance isn't only about the shingle on top — it's also about what's holding the roof structure down. Worcester County's guidance calls for approved metal high wind roof rafter-to-top plate tie downs fastened in accordance with the manufacturer's instructions2 at rafter connections, not just the standard framing nails a crew might default to on a rushed job.
The shingles themselves have an installation standard too. Local guidance is specific that shingles shall be installed as per shingle manufacturer's printed instructions for a high wind zone2 — which means the instruction sheet that comes in the shingle bundle isn't optional reading for the crew, it's part of what a code-compliant install actually looks like.
What Code Doesn't Require — and What FORTIFIED Adds
It's worth being honest about where the minimum code stops. The base residential code sets a wind-speed design requirement and basic fastening rules, but it doesn't require the extra layers that make a roof meaningfully tougher in a bad storm. Those extra layers exist — they're just voluntary, through a standard called FORTIFIED, built by the Insurance Institute for Business & Home Safety (IBHS), the same insurance-industry research group behind widely used hail-damage guidance.
FORTIFIED's roof-only standard asks for stronger connections to hold the roof onto the house3 and reinforced edges to help protect one of the roof's most vulnerable areas from high winds3 — both aimed at the exact rafter and edge weak points the base code only partly addresses. It also calls for a sealed roof deck to prevent rain from entering the home, even if shingles are lost3, so a torn-off shingle doesn't automatically mean a wet attic.
On the hail side, FORTIFIED requires a roof covering that can withstand hail up to 2 inches in diameter3, using high-performing impact resistant shingles that are superior performers based on IBHS's innovative impact test3. IBHS's own research found homes have shown to be durable in up to EF-2 level winds and against up to 2-inch hail3 under this standard. None of this is required to pull a permit in Maryland — it's an upgrade you'd have to ask for and pay for on purpose.
Questions to ask before you sign
- Which IRC edition does my county currently enforce, and is my contractor's quote built around it?
- What design wind speed is the proposed shingle rated for, and does that match my county's wind zone?
- Will the crew install rafter tie-downs at every connection, or only where the old roof already had them?
- Is a FORTIFIED roof an option, and what does it add to the price versus a code-minimum job?
- Will the permit inspector sign off on the fastening and tie-down work specifically, not just the finished shingles?
Common Mistakes Maryland Homeowners Make
- Assuming "code" means the same thing in every county, instead of asking what edition is actually enforced locally.
- Judging a roof's wind resistance by the shingle brand name instead of its design wind-speed rating.
- Letting a crew skip proper rafter tie-downs because the old roof "never had them either."
- Treating a FORTIFIED or similar voluntary upgrade as a scam add-on instead of asking what it actually buys.
- Assuming a code-compliant new roof will easily survive the next major storm.
If a storm already came through and someone's telling you that you need a new roof, check the signs first — see Is That Really Hail Damage? before you agree to anything.
The Bottom Line
A Maryland building permit confirms your new roof meets a real, enforceable wind-speed and fastening standard — not just a sales promise. That floor is worth knowing before you compare bids. Whether you pay extra for FORTIFIED-level protection on top of it is a separate, legitimate choice — just make it with the actual dividing line in view, not a contractor's framing of it.
Sources
- Policy: Energy Codes — Maryland Department of Energy
- Wind Resistance Requirements — Worcester County, Maryland Government
- FORTIFIED High Wind & Hail — Insurance Institute for Business & Home Safety (IBHS)