Kahului, HI
Maui's only commercial harbor and its main airport built a different roof stock, and a residential price list does not describe it
Kahului Airport is the island's primary airport facility and Kahului Harbor is the island's only commercial harbor, and the district around both grew into Maui's civic and commercial and industrial hub: warehousing, baseyard operations, light industrial buildings, and big-box and shopping-center retail. That is low-slope membrane and exposed-fastener metal deck construction, with parapet terminations and rooftop mechanical curbs, a different building class than the pitched residential roofs the rest of this state's file gets scoped against.
By Kyle Hamrick, Founder
A membrane roof over a harborside warehouse and a metal panel roof over a light industrial baseyard a few streets over sit inside the same district and do not get written from the same line item. Every file still gets read against the assembly, the parapet detail, and the rooftop equipment physically present on that specific roof, never against a price list default built for a house.
The Estimate Company is run by a licensed independent insurance adjuster, with claims experience across many states, writing for contractors nationwide. What we bring to a Kahului file is code mechanism, carrier behavior, and claim pattern, confirmed for the address rather than assumed from a statewide rule.
Adjuster licensure is held in South Carolina, North Carolina, Georgia, Texas, and Alabama. Estimates and supplements are written for contractors nationwide. More about Kyle.
What actually built this roof stock, before a single peril gets argued
The harbor and the airport built a commercial and industrial district, not a residential one
Kahului Harbor is the island's only commercial harbor and Kahului Airport is Maui's primary airport facility, and the district that grew up around both is described in the county's own planning record as the civic and commercial and industrial hub of the island, a focal point for heavy industrial, light industrial, and commercial activity: warehousing, baseyard operations, equipment and materials retailing, and automotive sales and service, alongside big-box and shopping-center retail. That is a fundamentally different building stock than the single-family houses, condominiums, and plantation-era cottages the rest of this state's roofing files get scoped against. A warehouse, a baseyard building, or a retail box in this district is built with a low-slope membrane or an exposed-fastener metal deck over a much larger structural span than a house roof, terminating at parapet walls rather than eaves, and carrying rooftop mechanical equipment a residential estimate has no line for at all.
Verify with local building dept Confirm the actual occupancy and building class for the specific address with Maui County before a claim gets scoped, since a mailing address in this district does not by itself say whether the roof underneath it is a low-slope commercial deck or a pitched residential covering, and pricing the wrong one from the outset makes every line item after it wrong too.
A low-slope roof fails at its edges and its penetrations, not across its flat field
Membrane and low-slope roofing over a warehouse, retail box, or light-industrial building does not fail the way a shingle field does. The flat membrane itself tends to hold up; what fails is the parapet wall termination where the membrane turns up and gets capped, the flashing collar around a mechanical curb where a rooftop unit sits bolted through the deck, and the individual penetrations where plumbing vents, electrical conduit, or equipment supports pass through the field. A price list line written to a square footage of membrane and nothing else has no way to describe linear feet of parapet termination or a count of curb and penetration details, and those details are exactly where a low-slope roof in this district actually leaks.
A commercial low-slope roof also commonly carries a working roof drain or a parapet scupper rather than a gutter line, and replacing the field membrane while leaving that drain or scupper connection unaddressed leaves the single most common leak point on the whole assembly untouched. The roof claim inspection checklist is the field sequence for documenting each of those details before a repair covers them back over.
Metal panel roofing scaled to a commercial span, and trade wind salt working on it unevenly
Exposed-fastener metal panel roofing over a warehouse or light-industrial building near the harbor spans a structural bay far larger than a house roof, which means more panel seams, more closure strips at ridges and terminations, and a fastener count that scales with that larger span rather than with a single-family building's dimensions. A metal roof line item written from a residential assumption undercounts both the seam and closure work and the number of fasteners a panel roof of this size actually carries.
Verify with local building dept Trade wind salt exposure works on that fastener and seam count unevenly rather than uniformly across the whole roof. A harbor-facing or windward elevation of a large panel roof takes a harder salt load than a sheltered elevation of the same building, so a corrosion argument written as one general statement about the roof, rather than documented elevation by elevation, misses the actual pattern an inspection finds and gives a carrier an easy basis to dispute the whole claim rather than confirm the part of it that is real.
Two arguments that move Kahului commercial files
Rooftop mechanical equipment is its own labor line, not an obstacle the crew works around for free
A warehouse, retail, or light-industrial roof in this district commonly carries packaged HVAC units bolted through curbs built into the low-slope deck, and a membrane crew cannot install a new field underneath fixed equipment still sitting on it. Unbolting the unit, staging it clear of the work area, rebuilding the curb flashing once the membrane is in, and resetting the unit is a distinct scope from the membrane itself, and it earns its own line precisely because a ground-level estimate written before anyone climbed onto the roof has no way to know the equipment is there at all.
Parapet and penetration detail has to be counted, not folded into a membrane square footage figure
A low-slope roof's parapet termination is measured in linear feet and its penetrations are counted individually, both figures independent of how many total squares of membrane sit in the flat field between them. Treating either one as a rounding error absorbed into the overall membrane price is how a supplement on this kind of roof loses money before the claim is even argued, since those are exactly the details a low-slope assembly fails at first.
The carriers writing this district, and what a commercial file needs confirmed first
The same roster of state-based and national carriers writing homes across Maui also writes the commercial property policies this district's warehouses, retail buildings, and light-industrial stock actually carry, and a commercial form is a materially different instrument than a homeowner policy: named-peril or all-risk structure, scheduled coverage for rooftop equipment, and often a separate reviewer track for anything above a small single-tenant building. A share of the harder-to-place industrial risk in this district lands with Hawaii's residual market association instead of a voluntary carrier, and that pool coverage tends to open with a leaner scope than a voluntary commercial policy would put on the same roof, which is a starting position to push against rather than a final number.
What actually decides a file here is whether the desk reviewing it defaults to a residential roofing assumption on a building that was never residential to begin with. A membrane roof read against a shingle price list, or a commercial metal panel roof read against a residential metal roof line, produces a scope that is wrong before the peril is even discussed. The reinspection supplement exists for exactly that file: the assembly gets correctly identified, the parapet, curb, and penetration detail get documented on paper, and the corrected scope is ready before the carrier ever sends someone back out to look a second time. Where the carrier conceded the assembly correctly but held money back at settlement rather than arguing it as scope, depreciation recovery picks the file up from there.
What gets recovered on a Kahului commercial 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.
Parapet wall termination priced as its own linear scope, separate from the field membrane
Code driven
A low-slope membrane roof over a warehouse or retail box almost always terminates against a parapet wall, and that termination detail, the cap flashing, the counterflashing, and the membrane turn-up, carries its own fastening and sealant requirement distinct from the flat field it borders. Pricing a parapet as a rounding error folded into the square footage of membrane above it leaves out the exact linear footage where this assembly actually leaks first.
Rooftop HVAC curb flashing, detach, and reset
Usually omitted
Warehouse, retail, and light-industrial buildings in this district commonly carry packaged rooftop units bolted straight through curbs built into the deck, and a membrane crew has to work its field right up to and around that fixed hardware rather than through it. Unbolting the unit, staging it off to the side, rebuilding the curb flashing once the membrane is in, and bolting the unit back down is real labor with its own line item, priced separately because nothing about that equipment shows up in a photo taken from the parking lot.
Exposed-fastener metal panel, seam, and closure replacement scaled to a commercial span
In scope
Metal panel roofing over an industrial or warehouse structure near the harbor spans a much larger structural bay than a residential metal roof, with more panel seams, more closure strips, and a fastener count that scales with that larger span, not with a single-family roof's dimensions. A line item written to a residential metal roof assumption undercounts both the fastener labor and the number of closures a commercial-span panel roof actually carries.
Trade wind salt exposure on exposed fasteners and panel seams, inspected panel by panel rather than assumed uniform
Verify with local building dept
A metal panel roof spanning a large commercial structure does not corrode evenly across its whole field. Fasteners and seams on the windward and harbor-facing elevations take a harder trade wind salt load than the same panel type on a sheltered elevation of the same building, so a corrosion argument written as one uniform statement about the whole roof misses the elevation-by-elevation pattern an inspection actually finds, and it has to be documented that way rather than generalized.
Roof drain and scupper resealing on flat and low-slope sections
Code driven
A flat or low-slope roof in this district commonly drains through an internal roof drain or a scupper cut through the parapet rather than a gutter line, and replacing the field membrane without resealing that drain or scupper connection leaves the single most common leak point on the assembly exactly as compromised as it was before the work started.
Deck moisture verification before a low-slope section is recovered rather than torn off
Verify with local building dept
Recovering a new membrane layer over a low-slope deck that already has moisture trapped beneath the existing membrane does not solve that condition, it seals it in place, and confirming deck moisture condition before a recover gets specified over a tear-off is what determines whether the repair actually holds through the next storm season or fails again underneath the new layer.
Pipe, conduit, and equipment penetration flashing counted individually, not estimated as a single allowance
Usually omitted
A commercial low-slope roof over a light-industrial or warehouse building routinely carries a dozen or more individual penetrations for plumbing vents, electrical conduit, and equipment supports, each one its own flashing detail, and a first estimate that folds all of them into a single lump-sum penetration allowance instead of counting them individually tends to understate the actual number present on a building this size.
Interior water damage to warehouse or retail stock discovered after a low-slope leak is traced
Usually omitted
A low-slope leak at a parapet termination or a mechanical curb does not always show up directly under the point of entry, it can travel across a flat deck before finding a path down, and warehouse or retail stock damaged by water that traveled some distance from the actual roof failure is its own documented loss, separate from the roof repair itself.
Discontinued panel profile or membrane sheet matching documentation
In scope
A metal panel gauge or a membrane sheet product goes out of production the same way any manufactured building product does, and a distributor letter naming the specific profile or sheet as discontinued is the paper that carries an unmatchable spot repair into a full section replacement on the carrier's desk. Walking the roof and describing the mismatch verbally does not do the same work as that letter, and the file waits on the letter either way.
Overhead and profit where a roofing trade and a mechanical or electrical trade share one rooftop loss
In scope
A loss that damages both the roof membrane and rooftop mechanical or electrical equipment sitting on it forces a schedule where the electrical or mechanical contractor has to clear the deck before the roofing crew can finish underneath, and neither trade can just work around the other's timeline. That coordination cost is billed as overhead and profit, and what earns it is the actual count of trades a single building's loss pulled onto the same schedule, regardless of what the claim adds up to in the end.
Each of those items gets built out as its own priced Xactimate line, with the reasons spelled out on the line itself instead of buried in a paragraph the carrier has to go digging for. What the deliverable ends up called depends on the claim: 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 is checked against the actual assembly, not a residential default
We read the Kahului estimate against your measurements and job photos line by line, marking every place a low-slope membrane, metal deck, or parapet detail on this building got priced as though it were a pitched residential roof.
- 02
Parapet, curb, and penetration counts are confirmed on the roof, not assumed from the ground
Termination linear footage, mechanical curb count, and individual penetration count get confirmed against what is actually up there, since a commercial low-slope roof carries far more of each than a single square footage figure captures.
- 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. 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. Carrier 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.
Kahului questions we get from contractors
Why does a Kahului roof estimate need to be different from a residential Maui estimate?
Because a meaningful share of Kahului's building stock is not a house. Kahului Airport is the island's primary airport facility and Kahului Harbor is the island's only commercial harbor, and the district around both grew into Maui's civic and commercial and industrial hub, carrying heavy and light industrial land, warehousing, baseyard operations, and big-box and shopping-center retail. A roof over a warehouse, a hangar-adjacent building, or a retail box is a low-slope membrane or metal deck assembly with parapet walls and rooftop mechanical equipment, not a pitched residential covering, and an estimate written from a residential price list is scoping the wrong building before a single peril is even discussed.
What does a carrier estimate typically miss on a low-slope commercial roof in this market?
The parts that are not the flat field itself. A low-slope membrane roof fails at its edges and its penetrations long before the field membrane does: parapet wall terminations, mechanical curb flashing around rooftop HVAC units, and pipe or conduit penetrations feeding equipment below. A default estimate priced to a square footage of membrane, without pricing the linear footage of parapet termination and the count of curb and penetration details separately, is missing the labor where a low-slope roof actually leaks.
Is metal panel roofing on Kahului's industrial buildings a different scoping question than metal roofing elsewhere in Hawaii?
The material is the same category, but the building class changes what the estimate has to account for. A residential metal roof is typically a single continuous field over a house. A warehouse or light-industrial building near the harbor is exposed-fastener metal panel over a much larger structural deck, with panel seams, closures, and fastener counts scaled to a commercial span rather than a residential one, and trade-wind salt exposure works on that panel and its fasteners over a larger area with more seams and more penetrations for it to find. Pricing it as a bigger version of a residential metal roof undercounts the fastener and closure work the actual span requires.
Do rooftop mechanical units change the scope on a Kahului commercial roof claim?
It commonly does, and this is one of the items a first estimate leaves out most often. Warehouse, retail, and light-industrial buildings in this district commonly carry packaged rooftop HVAC units sitting on curbs built into the low-slope deck, and a membrane or coating crew cannot simply work around bolted-down equipment. Detaching, staging, and resetting that equipment, and rebuilding the curb flashing underneath it once the unit is back down, is its own labor line separate from the field membrane, and a desk estimate written from an aerial photo has no way of knowing that equipment is sitting up there at all, which is exactly why it routinely goes unpriced.
Does Maui County govern permitting for a Kahului commercial roof the same way it does a house?
Maui County is the enforcing body for this address, the same as any other Maui file, but a commercial or light-industrial permit runs through a different review track than a single-family residential reroof, often with additional review tied to the building's occupancy and its mechanical equipment. Confirming the correct permit type and review track for a commercial low-slope reroof or recover, rather than assuming the same residential process applies, is a real step on a file in this district.
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.
Kahului and the Hawaii market
Kahului sits inside the wider Hawaii market, on Maui, one of four islands Maui County's own building department covers, separate from Honolulu 's Oahu government entirely. Within Maui, Kahului's harbor and airport commercial and industrial core is a different building stock than Kihei's condominium and resort inventory on the south shore or Paia's small north shore town, both of which are residential markets in a way this district simply is not. Lahaina sits further west on the same island, and Kailua-Kona, Hilo, and Kauai's Lihue answer to county governments of their own, each with a building stock and a peril profile that belongs to that address, not to Kahului's.
Send one Kahului file and see what a residential estimate left off the roof
Send the carrier's write-up along with your own takeoff and roof photos, and we will price the parapet, curb, and penetration detail this assembly actually carries, break out the metal panel and fastener condition by elevation rather than treating the roof as one uniform surface, and turn a corrected scope around inside a business day.