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Every roof is really two roofs. There is the part you see, the shingles or metal panels, and the part you do not, the wooden deck beneath it. That deck, also called sheathing, is the structural surface that everything else is fastened to. On the San Juan Islands, where roughly 40 inches of rain falls each year and moisture lingers for weeks, the deck is quietly the most vulnerable and most overlooked part of the whole system. This guide explains what roof sheathing is, how

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

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

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

Flat and low-slope roofs live by a different set of rules than the pitched roofs most homeowners picture. Water does not run off quickly; it lingers, ponds, and searches for the smallest seam. That makes the choice of system especially consequential in the San Juan Islands, where roughly 40 inches of rain a year sits on those low slopes and salt air tests every material. Two families of systems dominate the conversation: torch-down, a modified bitumen membrane applied with

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 judge a roof by what they can see: the shingles or metal panels on top. But the material that does the quiet, unglamorous work of keeping water out of your house is often the layer you never look at. Underlayment sits between the roof deck and the finish surface, and on a rainy island roof it can be the difference between a dry attic and a slow, hidden leak. In San Juan County, where roughly 40 inches of rain falls every year and November storms drive water