San Juan Roofing Co. logo San Juan Roofing Co.

San Juan Islands Roofing Contractor

San Juan · Orcas · Lopez · Shaw + outer islands

Island-tough roofs, built for salt air, wind & rain.

Licensed, island-based roofing for the San Juan Islands. We do metal, asphalt and designer shingles, repairs, moss treatment and storm damage. Every roof is built for our 40 inches of rain and west-side wind. We plan around the ferry, so the job gets done.

  • Island-based crew — we know the ferries
  • Salt-air & wind-rated roofing systems
  • Free inspections & written estimates
  • Honest repair-vs-replace advice
(360) 205-1462 or request a quote →

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Free inspection · No obligation · Island-based crew

Licensed & insured · We respect your privacy

Island-based crew — we know the ferries
Salt-air & wind-rated systems
Free inspections & written estimates
Honest repair-vs-replace advice

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Expertise & credentials

Why islanders trust us with their roofs

A decade-plus of San Juan County roofs. We know how each material ages here — and we spec for it.

Licensed, bonded & insured (WA)

A licensed Washington roofing contractor, fully bonded and insured. We know San Juan County code and pull the permits your job needs.

Island-based, not island-visiting

We live and work in the San Juan Islands. Ferry schedules, salt air, and west-side wind aren’t surprises to us — they’re just another Tuesday.

Coastal-rated systems

Certified installers of marine-grade metal and full manufacturer shingle systems built for saltwater and heavy rain.

15-year workmanship warranty

Every re-roof comes with our 15-year workmanship warranty — backed by Evergreen Summit Roofing (ESR) — on top of the manufacturer’s material warranty. The terms are in writing with your estimate.

10+ years on these roofs

More than ten years of San Juan County roofs means we’ve seen how each material really ages here — and we pick materials to match.

Rainwater-catchment aware

Many island homes collect rainwater. We build roofs that keep that water clean and your system working.

Manufacturer certified

Certified installer of trusted roofing manufacturers

We install full manufacturer systems and register the extended warranties — so your roof qualifies for the strongest available material and workmanship coverage.

IKO logo — certified installer

IKO certified installer

IKO ROOFPRO Select contractor. We register IKO’s extended Iron Clad Protection so qualifying shingles get longer coverage (e.g. Cambridge 10→15 years; Dynasty, Nordic & designer lines 15→20 years).

Owens Corning logo — certified installer

Owens Corning certified installer

Owens Corning Preferred Contractor. We can offer the System Protection warranty on Duration, Oakridge, Woodcrest & Woodmoor systems, including up to 50 years of non-prorated TRU PROtection coverage.

CertainTeed logo — certified installer

CertainTeed certified installer

CertainTeed installer, including Presidential TL. It’s a thick asphalt shingle that gives the deep, layered look of cedar shake without the upkeep, cost, or insurance surcharge.

Warranties

Coverage that actually stands behind your roof

Because we’re a certified contractor, we register the manufacturer’s extended warranties — and add our own 15-year workmanship coverage on top. You get the strongest protection available, in writing.

15-Year Workmanship Warranty

Evergreen Summit Roofing (ESR)

Our own 15-year workmanship warranty, in writing on every re-roof.

  • Covers our work — the labor and craftsmanship, not just the material
  • Backed directly by Evergreen Summit Roofing (ESR), the licensed contractor
  • Documented with your estimate, never a verbal promise
IKO (registered by ESR) logo

IKO ROOFPRO Select — Iron Clad Protection

IKO (registered by ESR)

Longer, contractor-registered coverage on qualifying IKO shingles.

  • We register the extended warranty so your coverage is longer than standard
  • Cambridge extends from 10 to 15 years; Dynasty, Nordic & designer lines from 15 to 20 years
  • During the Iron Clad period, a valid manufacturing-defect claim covers replacement shingles. It also adds a fair allowance for removal, disposal, and reinstallation.
Owens Corning Preferred Contractor logo

Owens Corning System Protection

Owens Corning Preferred Contractor

Up to 50-year, non-prorated coverage on a full Owens Corning system.

  • Qualifying products (Duration, Oakridge, Woodcrest, Woodmoor) can carry up to 50 years of non-prorated TRU PROtection coverage. That is for an owner-occupied, single-family home.
  • Covers qualifying shingles + required system components, reasonable replacement labor, and tear-off & disposal for a covered manufacturing defect
  • Adds 10 years of Owens Corning-backed workmanship coverage. That covers repair labor, tear-off, disposal, and certain flashing work on an approved claim.

Manufacturer warranties require qualifying products and proper registration; coverage, terms, and exclusions are set by the manufacturer. Exact terms for your roof are provided in writing with your estimate.

Pricing information

Honest island price ranges

Education-only ballparks for the San Juan Islands — they already carry the ferry, barging, and off-island disposal that mainland quotes forget. Your real number comes from a free inspection.

Service Typical range
Metal Roofing $14,000–$45,000+
Roof Replacement $11,000–$40,000+
Roof Repair $450–$3,500
Moss Treatment & Roof Cleaning $400–$1,600
Asphalt Shingle Roofing $9,000–$24,000
Cedar Roof Removal & Replacement $11,000–$40,000+
Flat & Low-Slope Roofing $8,000–$26,000
Roof Inspections & Maintenance Free–$450

Ranges are general estimates for typical island homes and are not a quote. Final pricing depends on roof size, pitch, material, access, and condition. Inspections & written estimates are free.

How it works

From call to finished roof

A simple, honest process built around island logistics.

  1. 1

    Call & free inspection

    Call (360) 205-1462. We schedule a free on-island inspection — including the outer islands — and take a real look at your roof, flashing, and deck.

  2. 2

    Honest assessment & written estimate

    We show you photos of what we found, explain repair-vs-replace in plain language, and give you a written estimate with clear material options — no pressure.

  3. 3

    Logistics & scheduling

    We lock ferry reservations, stage materials by the load, and put you on the calendar. For outer islands we plan one efficient trip.

  4. 4

    Installation, done right

    Our crew tears off, repairs the deck, and installs your system to manufacturer spec with proper flashing, underlayment, and ventilation.

  5. 5

    Cleanup & walkthrough

    We haul the old roof off-island, magnet-sweep for nails, and walk the finished job with you. Then your workmanship warranty is in writing.

Policies & guarantees

What you can count on

Free inspections & estimates

On-island roof inspections and written estimates are always free. You never pay to find out what your roof needs.

No high-pressure sales

We recommend a repair when a repair is right — even when a replacement would earn us more. On a small island, an honest reputation is the whole business.

Written scope & pricing

Every estimate spells out the material, scope, and price in writing, including the island travel. No surprise change orders mid-job.

Insurance-claim support

We take photos of storm and wind damage, write adjuster-ready reports, and can work straight with your insurer.

Clean, respectful jobsites

We protect landscaping, magnet-sweep for nails, and haul debris off-island. We leave your property the way we’d want ours left.

15-year workmanship warranty

A 15-year workmanship warranty backed by Evergreen Summit Roofing (ESR), plus the manufacturer’s material warranty on every re-roof — documented in writing, not verbal.

Homeowner FAQ

The questions island homeowners actually ask

Straight answers on cost, materials, moss, and island logistics — the same ones we give on the phone.

Cost & Pricing

How much does a new roof cost in the San Juan Islands?
For a typical island home, plan on about $9,000–$24,000 for architectural asphalt shingles, $14,000–$45,000+ for standing-seam metal, and $18,000–$50,000+ for cedar. Island prices run higher than the mainland. That’s because of ferry travel, barging materials, hauling the old roof off-island, and sometimes crew lodging. The real number comes from a free on-island inspection. Roof size, pitch, material, and access all change it.
Why are island roofing quotes higher than a mainland roofer?
Three island facts drive it up: (1) ferry reservations and travel time for crew and trucks, (2) barging or ferrying tons of material and hauling the old roof off-island to dump it, and (3) sometimes an overnight stay when the ferry won’t allow a same-day return. An honest island quote prices all of that up front. A mainland roofer who “forgets” it either cuts corners or hits you with extra charges mid-job.
How much does it cost to remove moss and clean a roof?
Most island roof cleanings run $400–$1,600. The price depends on roof size, pitch, how heavy the moss is, and access. That usually covers low-pressure cleaning, moss treatment, clearing the gutters, and adding zinc or copper ridge strips to slow regrowth. It costs far less than fixing the deck rot that untreated moss causes on our shaded roofs.
Do you offer free roof inspections and estimates?
Yes. On-island roof inspections and written estimates are free, even on the outer islands. Detailed real-estate or pre-purchase inspection reports — with photos and paperwork for a sale — are a flat fee. Call (360) 205-1462 to set one up.

Materials & Roofing

What is the best roofing material for the San Juan Islands?
For most island homes, standing-seam metal is the best long-term pick. It sheds our 40 inches of rain a year, resists moss, handles west-side wind, and can last 50+ years. Architectural asphalt shingles are the best value at 25–30 years when installed right. Cedar has the classic island look, but it needs the most upkeep in our wet climate. The right answer depends on your budget, your exposure, and how long you plan to own the home.
Metal roof vs. asphalt shingles — which should I choose?
Metal costs more up front, but it usually lasts 2–3x longer, resists moss, and shrugs off wind and salt air. So on the islands it often costs less per year. Asphalt shingles cost less at first, come in more colors, and are easier to repair. But here they need better airflow and moss control. If this is your forever home near the water, metal usually wins. If money is tight or you’ll sell within ten years, good architectural shingles make sense.
Does metal roofing hold up to salt air near the water?
Yes — if it’s the right metal. Within a few hundred feet of saltwater, we use heavier 24-gauge panels with marine-grade Kynar 500 / PVDF coatings made for the coast. We also use rust-resistant fasteners and clips. Standard builder-grade panels and cheap fasteners rust fast in the salt zone. So the spec matters as much as the metal itself.
How do I stop moss from growing back on my roof?
First, get a proper low-pressure cleaning and treatment. Then add zinc or copper strips near the ridge. Every time it rains, the metal releases ions that wash down the roof and hold back moss and algae. Also keep the roof clear of leaves and needles, and trim back branches that hang over it. Do that, and shaded island roofs stay much cleaner. Never pressure-wash shingles to remove moss. It strips the granules and shortens the roof’s life.
Do you repair or install new cedar shake roofs?
We no longer install new cedar, and we won’t sell cedar repairs we can’t warranty. The value just isn’t there anymore. New cedar costs as much as a premium roof, but it comes with little or no warranty, and most insurers now charge extra for it. Instead, we take the failing cedar off, fix the deck, and re-roof your home in architectural or designer asphalt or standing-seam metal. It costs about the same, comes with a real warranty, and holds up far better in our salt air, wind, and moss. We handle the full cedar tear-off and haul-off.

Island Logistics

Do you serve all the San Juan Islands, including the outer islands?
Yes. We serve San Juan Island (Friday Harbor, Roche Harbor), Orcas Island (Eastsound, Deer Harbor, Olga), Lopez Island (Lopez Village), and Shaw Island. We also reach the outer islands like Waldron, Decatur, Blakely, Center, and Stuart by ferry, barge, or charter as needed. Because we’re island-based, we plan the trips so your job gets done.
How does the ferry schedule affect my roofing project?
It affects timing more than anything. We book crews around ferry reservations. We bring materials by the load so we’re not stuck waiting on the next sailing. And we leave extra time for fog delays. For islands with limited service like Shaw, we pack the whole job into one efficient trip. This is the single biggest thing mainland roofers get wrong. It’s also why island-based scheduling matters.
How fast can you respond to a roof leak or storm damage?
Because we’re island-based, we can usually get to emergencies faster than a mainland company waiting on a ferry. For active leaks and storm damage, we tarp first to stop the water now, then set up the permanent repair. Call (360) 205-1462 as soon as you see water. Attic damage adds up fast in our winters.
How far out are you scheduling roofing jobs?
It depends on the season. Summer books up because everyone wants dry-weather installs, and ferry space gets tight with tourists. Emergency repairs jump the line. Your best move is to call early for a free inspection. That way we can get you on the calendar and, if needed, protect the roof in the meantime. Call (360) 205-1462 for current wait times.

Process & Policies

Are you licensed, bonded, and insured in Washington?
Yes — San Juan Roofing Co. is a licensed, bonded, and insured Washington roofing contractor. That protects you. A license means we know local code. Bonding and insurance mean you’re covered if something goes wrong. Always ask any island roofer for their credentials before work starts.
Do you offer a warranty on your roofing work?
Yes. Every re-roof comes with a workmanship warranty on our installation, on top of the manufacturer’s material warranty. We install full manufacturer systems, so your roof qualifies for the longest coverage they offer. We put the terms in writing with your estimate, so there’s no guessing later.
Will you help with my roof insurance claim after a storm?
Yes. We document the damage in detail with photos, give adjusters the reports they need, and can work straight with your insurance company on storm and wind-damage claims. Before you file, we’ll tell you honestly whether the damage is likely worth a claim.
What happens during a roof inspection and estimate?
We check the roof surface, flashing, penetrations, and gutters. Where we can reach it, we check the attic and deck too. We take photos of what we find, explain any problems in plain words, and give you a written estimate with clear material and scope options. There’s no obligation and no hard sell. Just an honest read on your roof and what it really needs.

Real call insights

What islanders actually call us about

Roofing on the San Juan Islands is nothing like the mainland. These are the hyper-specific questions we field every week — and the straight answers we give. If yours isn’t here, call and ask.

Metal Cattle Point, San Juan Island

I'm about 200 feet from the water at Cattle Point and I want a standing-seam metal roof. What gauge and coating actually holds up to the salt air out here?

Our answer

This close to saltwater we spec 24-gauge steel with a Kynar 500 / PVDF coating rated for coastal exposure, plus corrosion-resistant clips and stainless fasteners. Standard 26-gauge builder panels and cheap fasteners corrode within a few years in the salt zone. We'll walk your specific exposure and pick a system engineered for it.

Cedar west side, San Juan Island

The last windstorm tore a bunch of shakes off the west-facing slope of my cedar roof. Can you just replace those, or do I need a whole new roof?

Our answer

If the deck and the majority of the field shakes are still sound, a targeted repair is usually the right call and far cheaper. We'll pull a few shakes to check the underlayment and fasteners first. If the cedar is broadly at end-of-life we'll show you the photos and be straight with you rather than patch a roof that'll fail again next winter.

Moss Eastsound, Orcas Island

There's thick moss creeping up the north-facing slope of my roof under the firs in Eastsound. Is it too late to treat it, or do I need to replace the shingles?

Our answer

Moss itself rarely means instant replacement — the question is what's under it. We'll do a low-pressure clean and treatment (never a pressure washer, which strips granules), check the shingles and deck for soft spots, and install copper or zinc ridge strips so it doesn't come back. If we find rot underneath, we'll show you exactly where.

Logistics Orcas Landing, Orcas Island

The ferry's booked solid heading into August. How does that affect getting my re-roof done, and how far out are you scheduling on Orcas?

Our answer

We plan around exactly that. We stage materials by the load so the crew isn't idle waiting on a sailing, and we hold ferry reservations for crew and trucks in advance. Summer books up, so the move is to lock a free inspection now and get on the calendar. Call and we'll give you the current Orcas lead time.

Logistics Waldron Island

I'm on Waldron — no state ferry, no power grid. Can you even get a crew and materials out here to re-roof my place?

Our answer

Yes. Outer islands like Waldron we handle by barge or charter and plan as a single, efficient mobilization — one trip, materials and crew staged together, minimal round-trips. It takes more coordination, which is exactly why being island-based matters. Tell us the roof size and access and we'll map the logistics.

Repair Friday Harbor, San Juan Island

I've got a water stain on my bedroom ceiling but the roof above it looks fine. Where's the leak actually coming from?

Our answer

Water almost never enters directly above the stain — it travels along the deck or a rafter before it drips. Common culprits are flashing, a cracked plumbing boot, or a valley uphill of the stain. We track the actual entry point, fix that, and document it with photos so you're not paying to chase the wrong spot.

Flat Deer Harbor, Orcas Island

The low-slope roof over my addition keeps pooling water and leaking at the seams. What system should go on a flat roof out here?

Our answer

Pooling plus seam leaks usually means the wrong system or bad slope detailing. For island low-slope we install torch-down (modified bitumen) or heat-welded TPO/PVC single-ply, and we correct the slope-to-drain so water actually leaves the roof. Fully welded seams are the key — that's where flat roofs fail in our wet winters.

Inspection Lopez Village, Lopez Island

I'm buying a place on Lopez and my agent wants a roof report before closing. Can you get out there and turn it around fast?

Our answer

Yes — real-estate roof reports are something we do a lot of on the islands. We inspect the roof, flashing, and accessible deck, photograph everything, and give you a written report you can hand your agent and lender. We prioritize these so they don't hold up your closing, even on Lopez or the outer islands.

Metal Olga, Orcas Island

We collect rainwater for the house. Is a metal roof safe for a catchment system, and which coating won't contaminate our water?

Our answer

Metal is actually one of the best catchment surfaces — smooth, sheds cleanly, and doesn't shed granules like asphalt. We use coatings appropriate for catchment and detail the gutters and first-flush so your collected water stays clean. We'll match the panel and finish to your catchment setup.

Metal Lopez Island (open pasture)

My place sits out in open pasture and the wind just hammers the ridge and the rake edges. How do you keep a roof from lifting out here?

Our answer

Exposed, open sites need a tighter fastening schedule and proper edge-metal detailing — that's where uplift starts. On metal we increase clip density at the perimeter and ridge; on shingles we hand-seal the perimeter courses and use a higher wind-rated product. It's a detailing problem, and it's exactly the kind of exposure we build for here.

Storm Doe Bay, Orcas Island

A limb came down last night and punched a hole in my roof — it's raining into the house. How soon can someone get here?

Our answer

That's an emergency and we treat it like one. We prioritize getting a tarp and temporary weatherproofing on to stop the water first, then schedule the permanent repair and document the damage for your insurance. Being on-island, we can usually move faster than a mainland crew stuck waiting on a ferry. Call (360) 205-1462 now.

Repair Roche Harbor, San Juan Island

My skylights leak every winter no matter how much sealant I glob on. Can you actually fix that for good?

Our answer

Sealant is a band-aid — skylights leak because the flashing kit is wrong, old, or was never step-flashed into the roof properly. The real fix is to re-flash the skylight into the roofing system with the correct kit and, if the units themselves are shot, replace them. Done right, it stops leaking without a tube of caulk every fall.

Have a roof question that’s specific to your island and your home?

Call (360) 205-1462

Reviews & testimonials

Trusted across the islands

Real feedback from San Juan County homeowners — from Friday Harbor to the outer islands.

“They quoted the ferry and disposal up front, so the final bill matched the estimate exactly. Two mainland companies had given me lowball numbers that would’ve ballooned. The metal roof looks fantastic and hasn’t leaked through two winters.”

Karen M.

Friday Harbor, San Juan Island

Standing-seam metal roof

“A limb came through the roof during a February storm and they had it tarped the same day while a mainland crew was still trying to book a ferry. Documented everything for my insurance too. Lifesavers.”

Dave R.

Doe Bay, Orcas Island

Storm damage & emergency repair

“I was sure I needed a whole new cedar roof. They pulled a few shakes, showed me the deck was solid, and did a restoration for a third of what I expected. Honest people — rare and appreciated out here.”

Susan T.

Roche Harbor, San Juan Island

Cedar shake restoration

“The north side of our house under the firs was solid moss. They cleaned it gently, treated it, and put copper strips on the ridge. A year later it’s still clean. No pressure washer, no stripped shingles.”

Mark & Lisa P.

Eastsound, Orcas Island

Moss treatment & roof cleaning

“We’re on Lopez and needed a roof report fast to close on our house. They got out here, turned around a detailed report with photos in a couple days, and it didn’t hold up our closing at all.”

Jennifer K.

Lopez Village, Lopez Island

Pre-purchase roof inspection

“Our place is on Waldron — no ferry, no grid. They planned the whole thing as one trip, barged everything over, and re-roofed it without a hitch. I didn’t think anyone would even take the job.”

Tom H.

Waldron Island

Outer-island re-roof

Ready for a roof built for the islands?

Free on-island inspection and a written estimate — no obligation, no pressure. Serving San Juan, Orcas, Lopez & Shaw Islands — plus the outer islands of San Juan County.

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