Seasonal

Winter Rain Prep: Gutters, Drainage & Dry Rot in the East Bay

By Richard · Published October 8, 2025

We don’t get a long rainy season in the East Bay — but when it rains, it rains hard and fast. The kind of cloudbursts that hit Brentwood, Antioch, Oakley, and Pittsburg between November and March cause a lot of water damage, and the homes that survive it best are the ones that did a focused day of prep in October.

Here’s the punch list.

1. Clean Gutters and Test Downspouts

This is the single most important fall maintenance task. Gutters full of leaves overflow during heavy rain, and overflow is what soaks fascia, eaves, and (eventually) the wall behind them.

Clean every gutter, then run a hose into each one. Watch where the water comes out. The water should leave your property at least 4–6 feet from the foundation. If a downspout dumps right next to the house, get an extension on it.

2. Check Roof Flashing from the Ground

You don’t need to climb up. With binoculars from the ground, look at:

• The flashing where roof meets walls (chimneys, dormers, and any vertical wall that meets the roofline)
• Roof valley flashing
• Vent boots (the rubber gaskets around plumbing vents)

Lifted, cracked, or rusted flashing leaks. If you see any of those, get a roofer out before the storms.

3. Look at Foundation Drainage

Walk the perimeter of the house when it rains hard, if you can. Look for:

• Pooling water against the foundation
• Mulch washing toward the house
• Any spot where water is moving toward the house instead of away

The fix for most of these is regrading or French drain installation — bigger projects. But knowing where your problems are now means you can plan and budget.

4. Inspect Window and Door Caulking

Walk every exterior window and exterior door. Look at the caulking. Gaps and cracks need to be re-caulked before the rain. Water that gets behind siding through a failed caulk seam is one of the top causes of dry rot in East Bay homes.

5. Check for Existing Dry Rot

Probe with a screwdriver:

• Bottom corners of every window frame
• Fascia and eaves (where leaks tend to drip)
• Around exterior door jambs
• Bottom of porch posts
• Where downspouts dump on wood

Soft = trouble. Catch it now and the repair is small. Wait through a wet winter and small rot becomes big rot. More on spotting dry rot here.

6. Refresh Weatherstripping

Heat is leaking out, and the same gap that lets warm air out lets cold air in. Replace any compressed, cracked, or peeling weatherstripping at exterior doors. Cheap, fast, immediate comfort improvement, and your heater works less.

7. Trim Trees Away from the Roof

Branches that overhang the roof drop debris into gutters and onto roof surfaces, and in heavy wind they can scrape or break shingles. Get them trimmed back before the wet season. (Big trees are a pro job; smaller branches you can handle with a pole saw.)

8. Test Sump Pumps and Crawl Space Drainage

If your home has a sump pump, test it with a bucket of water. If it doesn’t pump, fix it now — not in February.

If you have a crawl space, check it after the first rain. Standing water means a drainage problem you’ll want to address.

9. Service the Heater

Replace the filter. Run the heat for an hour and listen for unusual sounds. If the heater hasn’t been serviced in a couple of years, get an HVAC pro in October — not in December when everyone needs them.

10. Stock the Storm Kit

Flashlights, batteries, a battery-powered radio, water, snacks, and a charged power bank. PG&E does power shutoffs in high-wind weather, and East Bay storms occasionally take out lines. A small kit makes that an inconvenience instead of a problem.

What to Hire Out

The high-ROI items I’d bundle into a fall handyman visit: gutter cleaning if you don’t want to climb the ladder, dry rot inspection and repair, exterior caulking refresh, and weatherstripping replacement.

If you’d like a fall walk-around for your East Bay home, send me a quick note or call (408) 623-0971.

#winter prep#rain#east bay

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