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In the San Juan Islands, fall is the deadline. The heaviest rain arrives in November, wind pushes across the water harder on the west-facing slopes, and the roof you ignored all summer is about to be tested by roughly 40 inches of annual rainfall concentrated into the wet months. A weekend of maintenance now is the cheapest insurance you'll ever buy — a small repair caught in October costs a fraction of the interior damage a missed one causes in January. Here are the nine t

A cedar roof is one of the most beautiful choices you can make for an island home. It is also one of the most demanding. In the San Juans, where roughly 40 inches of rain falls annually and shaded north slopes stay damp for weeks under Douglas fir canopy, cedar lives in a constant fight against moisture, moss, and salt-laden air. The good news is that cedar rewards attention. A shake or shingle roof that gets consistent care can last decades; one that is ignored can rot in

Not every roof in the San Juan Islands is a steep, pitched slope shedding rain into the firs. Modern additions, garages, dormers, and contemporary homes often feature flat or low-slope sections — and those areas need a completely different roofing approach. Standing-seam metal and asphalt shingles rely on gravity and pitch to shed water. A flat roof has almost no pitch, so it must rely on a fully sealed, continuous membrane to hold water out. In a place that sees roughly 40

Few roofing choices stir as much feeling on the San Juan Islands as cedar. A cedar shake roof looks like it grew out of the landscape, weathering to a silvery gray that seems made for a home tucked among Douglas fir. But the islands are hard on roofs. With roughly 40 inches of rain a year, salt air off every shoreline, west-side wind about 20 percent stronger than Anacortes, and moss that thrives on shaded north slopes, romance has to answer to reality. So how does traditio

Living on the San Juan Islands means living with salt. It drifts off the water on every breeze, settles on every surface, and quietly attacks anything that cannot resist it. Cheap fasteners rust, thin coatings chalk and peel, and porous materials trap the moisture that our roughly 40 inches of annual rain deliver. When you factor in west-side wind gusts about 20 percent stronger than Anacortes and moss creeping across shaded north slopes, the question of which roofing mater

When a storm tears open your roof or a branch punches through the deck, the water does not wait for a repair appointment. A well-placed tarp is the difference between a contained problem and a ruined ceiling, soaked insulation, and a mold headache that outlasts the storm. Emergency tarping is a temporary measure, not a fix, but it is one of the most valuable skills an island homeowner can understand. In the San Juan Islands, where a November storm can pin down the ferries a

Ask most homeowners what keeps a roof healthy and they'll point to shingles, metal, or membrane. Those matter — but the quiet hero of a long-lasting roof in a place like the San Juan Islands is something you can't see from the street: ventilation. In a climate that delivers roughly 40 inches of rain a year, grows moss on shaded north slopes, and wraps homes in damp marine air, a poorly ventilated roof rots from the inside out while looking perfectly fine on top. This gui

Most homeowners in the San Juan Islands think of their roof as a shield against the weather above it. That is only half the story. The air trapped underneath the deck matters just as much, and on islands that soak up roughly 40 inches of rain a year, poor ventilation quietly rots more roofs than any single storm. If you have ever seen a green carpet of moss creeping up a north slope or found a soft, spongy patch of plywood during a repair, ventilation was probably part of t