Little Rock’s building code sets the ground snow load at just 10 pounds per square foot, a number so light that snow rarely drives an Arkansas roof design at all. Wind is the load that actually governs most houses here, and that’s the number worth checking against your county’s building department before you assume anything about your own roof.
What is the ground snow load in Arkansas?
The design ground snow load at Little Rock is 10 pounds per square foot (psf), under ASCE 7-16, the edition the 2021 IRC and IBC make applicable in nearly every state, Arkansas included. That is the figure a permit application cites, the number a plan reviewer checks against, and the load a truss manufacturer builds into the drawings your framer orders. It is not a made-up planning number. It is what the paperwork actually runs on.
It is also, critically, a load on the ground, not on a roof. The code does not hand a rafter 10 psf and call it done. It applies exposure, thermal, and slope factors on top of the ground figure, and for an ordinary heated house with a sloped roof, that math lands around 7 psf of actual roof snow load, less again on a steep pitch. Confusing the ground number with the roof number is the single most common mistake anyone makes reading a snow load map, so keep the two separate in your head from here on.
ASCE 7-22, an edition a few Arkansas jurisdictions are beginning to phase in, maps the same point at 21 psf. That is not three times more snow falling on Little Rock. It is a strength-level figure built on a 1.0 load factor, where the 7-16 number runs on a 1.6 factor, so the two are not measuring the same thing on the same scale. Nothing about that difference means an existing roof built to the 7-16 figure is suddenly undersized. Treat 7-22 as the coming edition, not as today’s answer, until your local code adopts it.
Little Rock is the reference point for this figure. Elevation and local terrain shift snow load meaningfully across a state, so a number pulled for Little Rock says nothing definitive about a ridge in the Ozarks or a valley elsewhere in Arkansas. Your county’s building department has the map and the local amendments, and that’s the office to confirm the figure for a specific address rather than a state-wide average.
How much snow can a roof hold in Arkansas?
There is no single number for this, and anyone who gives you one inches of snow a roof “can take” is guessing. What decides it is the ground snow load converted to a roof load, the roof’s own slope and exposure, and what the snow itself has become by the time it’s sitting up there.
From ground load to roof load, and where drift changes the math
Starting from Little Rock’s 10 psf ground figure under ASCE 7-16, an ordinary heated sloped roof lands near 0.7 of that ground value, roughly 7 psf, and less on a steeper pitch that sheds snow readily. That is the baseline. It is not the worst case. Drift is where roofs actually fail, and drift piles up wherever wind has somewhere to drop what it’s carrying: against a taller adjoining wall, below a dormer, in a valley between two roof planes, or on a lower roof sitting beside a taller one. A drift can load a roof section several times over what the open-field number suggests, on the very same building.
The other variable is what the snow has turned into. Fresh, light snow runs roughly 5 to 7 pounds per square foot for every foot of depth. Settled or wet snow runs two to three times that for the same depth. A layer that has partly melted and refrozen into ice weighs more again. That’s why a foot of snow sitting on a roof in January, dry and powdery, is a completely different load than a foot of wet March snow, even though both measure a foot on a yardstick.
Watch for the signs that a roof is carrying more than it should:
- Interior doors that suddenly stick or won’t latch
- New cracks appearing in ceiling drywall, especially near the center of a span
- A ridge line that looks like it’s sagging when viewed from the ground
If you see any of that, the safe response is raking snow off from the ground with a roof rake, working from the eave inward. Climbing onto a loaded roof to shovel it is how people get hurt, on a surface that’s already carrying more than it was built to and may not tell you it’s failing until it does.
What wind speed must a roof withstand in Arkansas?
The basic design wind speed at Little Rock is 105 mph under ASCE 7-16, for Risk Category II, the classification that covers an ordinary house. That figure is a 3-second gust measured at 33 feet in open (Exposure C) terrain, not a sustained wind, and not what a weather forecast means when it reports wind speed. Compare it to a hurricane’s headline sustained-wind number and it looks alarmingly modest for how it’s used in structural design. It isn’t modest. It’s a different kind of measurement doing a different job, calibrated for the peak gust a structure has to survive, not the average wind blowing past it.
ASCE 7-22 maps the same point at 105 mph too, so there’s no change on the way for Little Rock specifically, unlike some Gulf Coast locations where the newer edition actually lowered the mapped speed without that meaning less hurricane risk.
What the number does and doesn’t require here
Arkansas is land-locked, and the wind-borne debris region defined in the code applies along hurricane-prone coastlines where wind speeds run considerably higher than Little Rock’s figure. That designation, where it applies, requires impact-rated glazing or approved shutters on new construction, a real added cost. It is a rule that matters enormously along the coast of a state like Alabama, and doesn’t reach an inland Arkansas address.
What the 105 mph figure does buy, everywhere in the state, is a set of practical requirements: a shingle’s rated wind resistance, the nailing pattern that holds it down, how the sheathing underneath is fastened, and the uplift connectors tying the roof structure to the walls below it. Edges, rakes, and ridges are where uplift concentrates under gusts, which is why those are the first places a roof fails in a wind event, not the open field of the slope.
Little Rock is the reference city for this number, and the spread across a state can be dramatic elsewhere. In North Carolina, the mapped speed runs from around 109 mph inland to well over 130 on the coast, a gap that simply doesn’t exist within Arkansas’s borders. Confirm your own county’s figure and any local amendments with your building department rather than assuming Little Rock’s number travels unchanged across the state.
Does Arkansas require an ice barrier under the shingles?
An ice barrier is a self-adhering waterproof membrane installed under the shingles, run from the eave edge up past the interior line of the exterior wall. Its job isn’t to stop snow. It’s to stop meltwater that has backed up behind an ice dam from working its way under the shingles and into the roof deck.
What actually causes an ice dam
The mechanism matters because it decides whether a membrane alone actually fixes anything. Heat escaping from the living space into the attic warms the underside of the roof deck, melting the snow sitting on it even while outdoor air stays below freezing. That meltwater runs down to the cold eave, past the warm zone, and refreezes there, building a ridge of ice that backs water up under the shingles above it. The membrane protects the deck once that’s already happening. It does nothing to stop the dam from forming in the first place. Only air sealing and adequate attic insulation prevent the heat loss that starts the cycle. A reader who installs the membrane and considers the problem solved has protected against the symptom, not the cause.
The code in force in Arkansas is the Arkansas Fire Prevention Code, 2021 Edition, Volume III – Residential, based on the 2021 International Residential Code, in force statewide since January 1, 2023, and enforced by the Arkansas State Fire Marshal’s Office. It sets a statewide minimum that individual municipalities may exceed but not weaken.
Whether an ice barrier is triggered for a given house depends on the local building official’s determination of a history of ice damming in that jurisdiction, something the state code leaves for local application rather than fixing at one temperature threshold. Little Rock’s coldest-month mean minimum temperature runs at 30.9°F, under NOAA’s 1991-2020 climate normals, a figure just below freezing rather than deep into it, which points to occasional icing rather than the chronic ice-dam conditions of a colder climate. That is context, not a verdict. Confirm with your local building department or the Arkansas State Fire Marshal’s Office whether an ice barrier is required for your specific roof and jurisdiction before you plan a re-roof around it.
What roofing material suits Arkansas best?
The honest answer depends on matching a material to the three numbers this page has already given: a light ground snow load around Little Rock, a design wind speed of 105 mph, and a climate that splits across two IECC zones, 3A across 63 of the state’s 75 counties and 4A across the other 12. That combination, not a blanket recommendation, is what should drive the choice.
| Material | Wind performance | Snow behavior | Added weight to consider |
|---|---|---|---|
| Architectural asphalt shingles | Rated by product, only as good as the nailing pattern used | Holds snow in place, minimal shed | Low, adds little to the snow load already carried |
| Standing-seam metal | Strong uplift resistance when properly fastened | Sheds snow quickly, sometimes all at once | Low, but shed snow lands somewhere and that placement is a design decision |
| Slate or concrete tile | Heavy profile resists uplift well | Holds snow similarly to shingles | Substantial, its own dead weight adds directly to whatever the roof already carries |
Where wind governs, as it does across most of Arkansas, the fastening and underlayment matter more than the material label on the package. A shingle rated for high wind performs only as well as the nailing pattern actually used to install it, and a sheathing panel under-fastened at the edges undermines a well-rated roof covering above it. Metal sheds snow effectively, which sounds like an advantage until that shed snow lands on a doorway, a walkway, or a driveway below, at which point where it’s designed to slide becomes as important as how well it slides.
None of this substitutes for a design decision made with a licensed professional and your local building department, who can confirm the load figures, wind requirements, and any amendments that apply to your specific address. Getting the roofing right starts with those numbers, not the other way around.