Roofing · Friday Harbor
San Juan Island Roofing
From Friday Harbor to the exposed west side, San Juan Island roofs take the county’s hardest wind and salt spray. We spec and install accordingly.
San Juan Roofing Co. is an island-based roofing contractor serving all of San Juan Island, from Friday Harbor, Roche Harbor, Cattle Point to Lime Kiln. Because we live and work in the San Juan Islands, we plan every job around the ferry schedule and spec every roof for our salt air, heavy rain, and wind.
Local conditions on San Juan Island
The west side (Lime Kiln / Cattle Point) sees wind roughly 20% stronger than Anacortes — fastening and edge-metal detailing matter here.
Roofing services on San Juan Island
Metal Roofing
Standing-seam & metal systems engineered for salt air and wind.
Roof Replacement
Full tear-off & re-roof, sequenced around the ferry schedule.
Roof Repair
Targeted leak & wind-damage repair — fixed, not upsold.
Moss Treatment & Roof Cleaning
Kill the moss, protect the roof — the PNW way, without a pressure washer.
Asphalt Shingle Roofing
Architectural shingles — the value choice, installed to last here.
Roof Inspections & Maintenance
Annual inspections, real-estate reports & maintenance plans.
What San Juan Island homeowners ask us
“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?”
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.
“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?”
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.
“I've got a water stain on my bedroom ceiling but the roof above it looks fine. Where's the leak actually coming from?”
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.
“My skylights leak every winter no matter how much sealant I glob on. Can you actually fix that for good?”
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.