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Sonoma sits on the floor of its own valley, and the climate shows it. The town averages a little under 30 inches of rain a year, but summer afternoons top 90 degrees on roughly 58 days. Long, hot summers are hard on gutters in ways people don't notice until the rain arrives: sealant dries and splits, paint chalks off, and the metal expands every afternoon and shrinks every night, slowly working fasteners loose. Then the winter storms come through, and every gap the heat opened starts to drip. On the older streets close to the Plaza, homes from the early 1900s and before often carry gutters older than anyone remembers installing. Out on the valley floor, newer houses bring their own problems, mostly undersized gutters and downspouts.
We replace old gutters, install new seamless systems and add guards across Sonoma. If yours are rusted, sagging or patched in too many places, see our gutter replacement page for how a full swap works, including the check of the boards behind the old gutters. Homes under oaks usually benefit from gutter guards. Estimates are free, and we measure the whole house first. Most Sonoma jobs finish in a day.
Heat-Tired Gutters on the Valley Floor
In summer, the gutters on sunny walls of Sonoma homes sit in direct sun all afternoon. On old vinyl, that heat makes the plastic brittle, and it cracks the first time a ladder or a falling branch touches it. On painted steel, it chalks the finish and opens the door to rust. Even aluminum feels it at the joints, where years of daily expansion pull sealant away from the metal. That's why so many valley homes leak at the corners and outlets first. When we replace gutters here, we use seamless aluminum with factory-baked paint, hidden hangers that hold through the expansion, and a sealant made for heat. Houses closer to the bay in Petaluma see far cooler summers, but the same seamless setup holds up there for different reasons. If your vinyl gutters are chalky and cracked, they're done.
Sonoma Creek and Oak-Shaded Streets
Sonoma Creek runs south through town toward the marshes, and the neighborhoods along it are some of the shadiest in the valley. Big valley oaks hang over a lot of roofs here, and they shed leaves just as the first storms show up, along with acorns that roll into gutters and lodge in downspout elbows. Under that kind of cover, a gutter can go from clean to overflowing in a single season. Metal guards help a lot, and a cleaning in late fall keeps outlets open. Oaks also drop limbs in winter wind, and a heavy branch landing on a gutter can bend it, crack a corner or pull it loose. If that happens, a gutter repair visit can usually straighten things out or replace the damaged run without redoing the whole house. Homes on lower ground near the creek should also have downspouts pointed away from the house, since the soil there drains slowly in a wet year.