South Carolina
Supplements written for South Carolina roofs, coast and Upstate
South Carolina is two roofing states wearing one flag. From Little River down to Hilton Head the roof is a wind assembly built to a coastal standard. Ninety minutes inland it is a hail assembly on a steep, cut up subdivision roofline. An estimate written for one is wrong for the other, and that gap is where the supplement lives.
By Kyle Hamrick, Founder
The Estimate Company is run by a licensed independent insurance adjuster, and South Carolina is where we are from. In the Upstate and up through the Columbia corridor, contractors have been sending us files for years, so the carrier reads on those markets are not research. They come from the same desks, the same reinspections, and the same storms your crews worked.
On the coast the basis is different, and it is worth being straight about it. What we bring to a Horry or Charleston or Beaufort county file is the same thing we bring anywhere else: the code mechanism, the carrier behavior, and the claim pattern, each confirmed against that address instead of inferred from a statewide rule.
Licensed independent adjuster in South Carolina, North Carolina, Georgia, Texas, and Alabama, writing for contractors nationwide. More about Kyle.
What actually damages roofs in South Carolina, and what it does to the estimate
The coast: Little River to Hilton Head
Horry, Georgetown, Charleston, Beaufort, Colleton, and Jasper counties sit inside the wind borne debris region. That designation raises design wind speeds, and with them the fastening schedule, the underlayment requirement, the product approval on every component, and the metal on anything exposed to salt air. A roof three blocks off the Waccamaw and a roof in Aiken are different assemblies, and the price list default is written for the second.
Named storms are the calendar down here. Hugo rewrote how the Lowcountry builds. Matthew and Florence pushed water into houses that took no wind damage. Ian came ashore near Georgetown and stripped the Grand Strand piers. Each produced the same claim pattern: a fast first estimate covering the obvious field shingles, and nothing covering the assembly the county requires when that roof gets rebuilt. Add what hangs off the house, since screen rooms, pool enclosures, porch roofs, and carports are standard here and cannot be roofed over.
Upstate and Midlands: Greenville, Spartanburg, Anderson, Columbia
Inland South Carolina is a hail and straight line wind market with a housing stock problem attached. The subdivisions around Greenville, Greer, Simpsonville, Boiling Springs, and Lexington were built with steep pitches, multiple dormers, and rooflines cut up by gables and valleys, all of which cost labor a squares based estimate does not carry.
Upstate hail also gets underread. Spatter washes off before an adjuster arrives, soft metals tell the story better than the shingles do, and an inspector working from a bruise count in one test square will short the slope that took the actual impact. Reversing that takes a documented case built the way the carrier will have to defend theirs. The roof claim inspection checklist is the field sequence we use to make sure that documentation exists before the adjuster ever shows up, because it cannot be recreated after the tear off.
Columbia and Sumter sit in between, taking the inland hail pattern and catching tropical remnants that arrive still carrying wind, which produces mixed peril claims carriers sort into whichever bucket costs less.
Three code arguments that move South Carolina files
The repair threshold that turns a repair into a replacement
South Carolina adopts the model existing building provisions, and they carry a threshold: once the repaired portion of a roof passes roughly a quarter of the total inside a twelve month window, the whole roof comes up to current code. Contractors call it the 25 percent rule. When it applies it is the largest single recovery on the claim, and it is also the one most often waved off by an adjuster who assumes you are quoting Florida. Verify with local building dept Adopted editions and local amendments vary, so confirm the threshold with the building department for that address.
Secondary water barrier on the coast
A sealed roof deck, by self adhering underlayment or taped seams, is what keeps water out of the house after the covering leaves in a tropical system. On the coast it is driven by the wind borne debris provisions, and inland the SC Safe Home program run through the Department of Insurance pushes homeowners toward the same detail. Neither fact puts it on a carrier estimate. Somebody has to write it, cite it, and hold the line on it.
Coastal upgrades are real, but the name is not HVHZ
The High Velocity Hurricane Zone is a Florida designation covering Miami-Dade and Broward. South Carolina has no HVHZ, and calling it that in front of an adjuster costs you the argument in one sentence. What it has is a wind borne debris region with elevated design wind speeds and the fastening, underlayment, product approval, and corrosion resistance requirements that follow. Same practical recovery, correct language.
The carriers writing South Carolina, and the split nobody warns you about
State Farm, Allstate, Travelers, Nationwide, and SC Farm Bureau carry most of the residential book. USAA concentrates where the military is, which here means Joint Base Charleston, Parris Island and the Beaufort air station, and Shaw in Sumter. Each carrier has its own habits about what it pays without a fight, and those habits are consistent enough to plan a supplement around.
The structural thing to understand on the coast is the wind and hail split. The SC Wind and Hail Underwriting Association writes the wind and hail peril for much of the beach and coastal property in the six coastal counties, while the homeowner keeps a separate policy for everything else. One roof, one storm, two carriers, two estimates, and two chances for each to point at the other. Supplementing those files means keeping the wind scope and the water scope cleanly separated so neither carrier can push the loss across the line.
After a named storm makes landfall, both sides of that split get handed to catastrophe adjusters brought in from out of state on daily file counts. Speed is what they are measured on. That is a workload reality rather than a character judgment, and it produces thin estimates exactly when volume is highest. The reinspection supplement exists for the files where the only way forward is getting somebody back on the roof with the documentation in hand.
What gets recovered on a South Carolina roof file
Ordered by how often the item is missing when a file reaches our desk.
Status key: In scope. Usually omitted. Code driven. Verify with the authority having jurisdiction. Every status is spelled out in words beside the item, so nothing depends on color.
Self adhering or taped deck secondary water barrier
Code driven
Driven by the coastal wind borne debris provisions and pushed inland by SC Safe Home. Almost never on a first estimate.
Enhanced fastening pattern and ring shank nails
Code driven
Coastal design wind speeds drive a heavier nailing schedule than the default line item assumes. Labor and fastener change.
Corrosion resistant drip edge, valley metal, and flashing
In scope
Salt air eats standard galvanised metal within sight of the water. On a Charleston or Beaufort roof the correct metal is a requirement, not an upgrade.
Full roof replacement under the repair threshold
Verify with local building dept
Past roughly a quarter of the roof inside twelve months, the existing building provisions push the job to full replacement at current code. Confirm the adopted edition locally.
Starter course at eaves and rakes
Usually omitted
Manufacturer wind warranties on the coast are void without it. Adjusters fold it into the shingle line when it is separate material.
Ridge vent, hip and ridge cap, and closure
Usually omitted
Cut ridge, vent, and cap are three operations. Carrier estimates commonly pay one and assume the other two.
Detach and reset on porches, screen rooms, and pool enclosures
Usually omitted
Standard on Lowcountry and Grand Strand houses. Nobody roofs over an attached screen structure, so the labor is real.
Steep and high charges on Upstate roofs
Usually omitted
Greenville and Spartanburg subdivisions run steep pitches and cut up rooflines. An estimate written off a flat measurement misses both.
Decking replacement and spaced sheathing
In scope
Older Charleston peninsula and Columbia stock hides board decking that will not hold a modern fastening schedule. Found on tear off, which is why it supplements.
Interior water damage after tarp removal
Usually omitted
Tropical claims produce ceiling, insulation, and drywall loss that was not visible when the first estimate was written.
Matching and discontinued shingle documentation
In scope
Where a repair cannot be matched, the file needs written proof, not an opinion. That is what converts a repair estimate into a replacement.
Overhead and profit on multi trade files
In scope
Roof, gutter, siding, screen, and interior on one loss is a general contractor coordination file. That is the test, not the dollar amount.
Each becomes a written line with a reason attached, inside a real Xactimate file. Depending on the claim it ships as a roofing supplement, an Xactimate supplement package, a supplemental estimate, or a full claim estimate written from scratch.
What happens to your file after you send it
- 01
The carrier estimate gets read line by line against the roof
Not skimmed. We pull the estimate apart against your measurements and photos, marking every line where the assembly written does not match what that roof needs in that county.
- 02
Code and manufacturer requirements get sourced before they get argued
Coastal fastening, underlayment, and metal specification arguments only work when cited correctly. Where a requirement varies by jurisdiction we confirm it for the address rather than assert a statewide rule an adjuster can knock down.
- 03
The supplement is written in Xactimate and delivered as a PDF
Real file, real price list, real sketch. You get the PDF as the deliverable, and the ESX free any time you ask for it. Retail estimate work with no supplement attached delivers the ESX. Written same day or next day, submitted next day. One to three extra days on large commercial and multi structure work.
- 04
We stay on the file until the carrier answers
Follow up, desk adjuster calls, and reinspection support when the carrier sends someone back out. Response runs about three weeks as a general expectation, and the file does not close on our side because it went quiet on theirs.
Two promises, stated separately
Promise one: the fee
The standard fee is 15 percent of supplemental recovery. If a file produces no additional approved recovery, you pay nothing on that claim. That is the whole fee structure, and it applies claim by claim.
Promise two: the guarantee
Send us an average of 2 claims per week for 12 months. If that volume does not produce a minimum of six figures in additional margin for your company, we write you a $5,000 check at the end of the 12 months. The volume, the 12 month term, the six figure threshold, and the $5,000 figure are one set of terms and they always travel together.
Two different promises, no overlap. The fee describes what a single claim costs you. The guarantee describes what a year of steady volume is worth. Nothing in the fee structure is a guarantee, and the guarantee does not change the fee.
South Carolina questions we get from contractors
What do South Carolina carriers leave off a coastal roof estimate?
Most often the underlayment upgrade, the enhanced fastening the wind zone calls for, corrosion resistant metals, and the full ridge and hip system. Coastal roofs here are assembled to a higher wind standard than the rest of the state, and a first estimate written from a national price list reflects an inland assembly. The gap is code and assembly, not measurement.
Does the 25 percent roof replacement rule apply in South Carolina?
The existing building provisions adopted in South Carolina carry a threshold that pushes a partial repair into a full replacement at current code once the repaired area passes roughly a quarter of the roof inside a twelve month window. Adopted editions and local amendments differ, so confirm the threshold with the building department for that address first.
Is there a High Velocity Hurricane Zone in South Carolina?
No. The High Velocity Hurricane Zone is a Florida designation covering Miami-Dade and Broward, and South Carolina has no equivalent named zone. What it has is a coastal wind borne debris region with higher design wind speeds and matching product approval, fastening, and underlayment requirements. Similar effect on a supplement, but the language has to be correct or the argument gets dismissed on its face.
Why do estimates get worse after a named storm hits South Carolina?
Because the file is no longer with a local adjuster. Carriers surge catastrophe adjusters into Horry, Georgetown, Charleston, and Beaufort counties from out of state, working daily file counts that reward speed. Those estimates get scoped thin, missing the coastal assembly requirements, the detach and reset on attached structures, and the interior water damage that appears after the tarp comes off.
Do you work with contractors insured through the SC Wind and Hail Underwriting Association?
Yes. The pool writes the wind peril for much of the beach and coastal property in the six coastal counties, so the wind loss and the water loss on one roof can sit with two carriers on two estimates. Supplementing those files means keeping the scope split clean.
How fast is turnaround, and what does it cost?
Estimates are written same day or next day and submitted next day. Larger commercial and multi structure files take one to three extra days, said up front. Carrier response runs about three weeks as a general expectation. The standard fee is 15 percent of supplemental recovery, and a file with no additional approved recovery owes nothing on that claim.
South Carolina markets
Coast
- Charleston and the Lowcountry
- Myrtle Beach and the Grand Strand
Upstate and Midlands
- Greenville and the Upstate corridor
- Columbia and the Midlands
Files also come in from Spartanburg, Anderson, Greer, Simpsonville, Easley, Beaufort, Hilton Head, Georgetown, Florence, Sumter, and Aiken.
Send one file and see what came back short
Send the carrier estimate and your measurements. The supplement comes back next day, written by a licensed adjuster who knows the difference between a Beaufort County roof and an Anderson County roof.