Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Fast, Reliable Roofing Company Across Key Biscayne
Roofing work on Key Biscayne is different from mainland Miami. The island sits between Biscayne Bay on the west and the open Atlantic on the east, which means every roof gets hit with salt spray from two directions at once. That’s not a minor detail. It changes what fasteners we buy, which underlayment we specify, and how closely we watch the flashing. Our crews serve Key Biscayne from the brand’s Miami (South FL) office daily, and every job begins the same way: a written price before any work starts. If you need repairs or a Roof Replacement - Key Biscayne, call (945) 303-9821. A live person answers.
Why Tilehurst Roofing Is Key Biscayne’s Preferred Roofing Company
Homeowners on Key Biscayne tend to ask sharper questions than most. They’ve seen what salt air does to a roof, and many of them have already paid for repairs that didn’t last. That’s why the Roofing Company process here is built around the written guarantee, delivered before the crew leaves the property. We don’t mail it later. If a repair fails inside the guarantee period, we return at no charge under the 365-Day Done Right Promise. No arguing, no re-quoting, no phone tag.
Our technicians arrive in uniform and have passed background checks, so when you open the door on a Harbor Drive or Mashta Island home, you know exactly who is on your roof. Customers regularly tell us the thing that set us apart was the price being fixed before materials were ordered. On high-end Key Biscayne work, that matters. Specialty tile, architectural shingles, and Miami-Dade approved underlayments are long-lead items. You should never be told a price after the products arrive. You should know it before we order them.
Greg Holloway leads the Key Biscayne service area, and he’s particular about the “Kingswell Way“: say the price before the work, show up in the window we gave, leave the property cleaner than we found it, put the guarantee in writing, and come back if it fails. That’s the entire process.
Roof Maintenance in Key Biscayne
Roof Maintenance on Key Biscayne is as much about salt as it is about shingles. Even a roof installed perfectly will accumulate corrosion on ridge-cap fasteners, drip edge corners, and flashing seams within a few years, simply because wind carries bay salt and ocean salt across the roof deck from both sides. A maintenance visit typically involves a documented inspection of every penetration (pipes, vents, skylights), re-seating any lifted ridge caps, tightening or replacing corroded fasteners at the nail fin, clearing valley and scupper debris, and sealing exposed fastener heads. Most single-family homes on Key Biscayne see real benefit from a maintenance visit every 24 months. Expect to pay between $350 and $700 for a thorough maintenance pass, depending on roof size, walkability, and what we find. Repairs found during maintenance are quoted separately and in writing before any additional work proceeds.
Salt Corrosion Checks
The first thing we inspect on a Key Biscayne roof is fastener condition. On the island, standard hot-dipped galvanized nails rust at the head and shank within a decade and sometimes faster on the bay side. We look for rust blooms on the shingle surface, lifting at the ridge line, and drip edge separation. If we find galvanized fasteners failing, we replace them with stainless ring-shank nails. No exceptions.
Valley and Flashing Maintenance
Valleys are where two roof slopes meet, and on Key Biscayne they’re the first place debris and salt build up. Our maintenance pass clears them, checks the underlayment beneath for moisture wicking, and confirms the flashing is still holding its laps. A $75-$150 flashing re-seal during maintenance can prevent a $1,800-$4,500 interior repair later.
Roof Coating in Key Biscayne
Roof Coating on Key Biscayne works differently depending on the roof type. For the mid-rise condominium and apartment buildings along Crandon Boulevard and Ocean Drive with low-slope membrane roofs, a silicone or acrylic coating can extend the life of an existing modified-bitumen or built-up roof by 8-12 years, provided the base membrane is still sound. Coating also reflects UV, which matters on an island where the roof deck absorbs Atlantic sun all day. For most flat and low-slope roofs on the island, a coating application runs $2.75-$4.50 per square foot, depending on the coating chemistry and number of coats. We don’t coat over failing membrane. If the base is saturated, coating it is money wasted, and we’ll tell you that in plain words. For coated roofs, a yearly inspection walks the seams, checks the scupper drains, and confirms the coating hasn’t thinned at the parapet edges.
Coating vs. Replacement
The honest question on a low-slope roof in Key Biscayne is whether the membrane itself is still intact. Coatings seal surface wear, not structural failure. If the membrane has blisters, split seams, or ponding water that sits for 48 hours after a storm, coating is not the fix. A moisture scan tells us which one you have. That costs between $250 and $600 for a typical residential building on the island and is credited back if you proceed with the coating within 30 days.
Boat and Equipment Roofs
Many Key Biscayne waterfront properties have detached structures: boat garages, pool cabanas, generator shelters. These smaller flat roofs are ideal coating candidates and usually take less than a day. Coating a boat garage roof on Key Biscayne typically runs $1,400-$3,200 total, and it’s a good way to stretch the life of a structure that sits in direct salt exposure year-round.
Trusted Brands We Service in Key Biscayne
We don’t push a single house brand. Our shops keep current stock for the manufacturers that dominate Key Biscayne: GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral. That’s seven separate product lines, so when we recommend a particular architectural shingle or concrete tile, it’s because it fits the structure, the pitch, and the wind exposure on your specific corner of the island, not because it’s what the truck happened to be carrying. Local parts availability matters here: because Key Biscayne’s building department enforces Miami-Dade NOA listing on every roofing product, we keep the documentation current and can pull the NOA for your product at permit time without chasing a distributor. Brand-wise, we see a lot of GAF architectural shingle on post-Andrew single-family homes, Boral concrete tile on larger custom builds where weight works with the structure, and Atlas products on attached structures and cabanas.
Common Roofing Company Problems We See in Key Biscayne Homes
- Dual-direction salt corrosion on fasteners and flashings. Bay wind from the west and ocean wind from the east means every nail head, ridge-cap fastener, and drip edge seam rusts twice as fast as a mainland Dade roof. We replace galvanized with stainless ring-shank as standard practice on the island.
- Elasto-mastic patches over failing underlayment. Handyman-grade repairs on Key Biscayne often seal the surface but leave the water migration path underneath. We see this frequently on homes where a previous contractor “fixed” a leak with a bucket of mastic and a prayer.
- The 1993-1996 post-Andrew roof cycle hitting end of life simultaneously. The island’s housing stock was largely rebuilt or substantially repaired in the mid-1990s, and those 28-30-year-old roofs are now failing in clusters. If your neighbors on Harbor Drive or Fernwood Road are replacing, yours is likely on the same clock.
- Underlayment and tile systems installed to Broward code on a Dade island. Products that are legal in Broward County do not always hold a Miami-Dade NOA. We have inspected roofs on Key Biscayne where the underlayment or fastener spec would not pass a Key Biscayne permit today.
Pricing for Roofing Company in Key Biscayne, FL
Asphalt shingle repair on Key Biscayne typically runs $450-$900 for flashing work, $350-$750 for a ridge cap section, and $900-$2,800 for a repair involving underlayment replacement. A full architectural shingle roof replacement on a 3,000-4,000 sq ft home runs $18,000-$34,000, with tile coming in above that. Low-slope coating work lands between $2.75 and $4.50 per square foot. What moves the number most on this island is the product’s Miami-Dade NOA status, the roof’s walkability (steep tile roofs with no perimeter access cost more per square), and whether the decking under the old roof is sound or needs replacement. We give you a written price before any work starts, and that number does not change at the door. Call (945) 303-9821 to schedule a free estimate.
We Also Serve Cities Near Key Biscayne
Our Roofing Company in Key Biscayne crews extend across the causeway when needed, serving Key Biscayne plus neighbors in Miami Beach, Miami, Coral Gables, and Hialeah. The salt and NOA concerns differ from one zip to the next, but the process stays the same: written price before work starts, written guarantee before we leave.
Serving Key Biscayne, FL - Our Local Coverage Area
We’re based in the Key Biscayne area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Roofing Company in Key Biscayne
Salt corrosion drives the difference. A mainland Miami roofer might spec hot-dipped galvanized fasteners and a standard underlayment, while a Key Biscayne roof needs stainless ring-shank nails at a tighter inspected spacing and a Miami-Dade NOA-listed underlayment that costs more per square. The product specs are materially different even when the shingle manufacturer is the same. Call (945) 303-9821 for a written breakdown.
One square is 100 square feet of roof surface. A typical Key Biscayne single-family home runs between 30 and 45 squares, though larger custom homes on large parcels can exceed 60. The square count drives material pricing: shingles, underlayment, decking, and fasteners are all quoted per square. We measure the roof in person during the estimate because tax records rarely match the actual built condition.
Most of them do, yes. The post-Andrew rebuild window is now hitting 28-30 years, which is service life for an architectural shingle roof in a dual-salt environment. Decking condition varies by property, but the fastener and underlayment degradation on these roofs is consistent. We can inspect and tell you honestly whether you have another two years or are already past due. Estimates are free.
Because specialty tiles, architectural shingles in specific colors, and Miami-Dade NOA underlayments are ordered per project, not stocked on the floor. If a homeowner wants a specific Boral tile profile or GAF color, that product can take 3-8 weeks to arrive. Labor can always be scheduled. Product arrives when it arrives. We fix your price in writing before the order is placed, so the budget doesn’t drift while the product ships. Call (945) 303-9821 to start the material discussion early.
Every 24 months, have every penetration inspected, ridge caps reseated, corroded fasteners replaced with stainless, valleys cleared, and scupper drains flushed. On Key Biscayne specifically, we also check drip edge corners and flashing laps on both the bay and ocean elevations because the wind loads differ by orientation. A $350-$700 maintenance visit in Key Biscayne regularly prevents a $2,000 repair two years later. For exact pricing on your roof, call (945) 303-9821.
Written by Greg Holloway, Owner at Tilehurst Roofing, serving Key Biscayne with the Kingswell Guarantee on every job.






Before
After
Before
After
Before
After