Roof Leaking in the Rain? What to Do in the First 24 Hours

Bay Area rainy season runs roughly November through March, and the first big storm is when most hidden roof problems show up as water on the ceiling. A leak during a storm is stressful, but the right steps in the first few hours limit the damage and make the repair, and any insurance claim, much simpler.

1. Stay safe first

Do not climb onto a wet roof. Wet shingles, moss and flat roof membranes are slippery, and San Francisco roofs are often two or three stories up. If water is near light fixtures, outlets or electrical panels, switch off power to that area at the breaker. If a ceiling is sagging with water, keep people away from underneath it.

2. Contain the water inside

Put buckets or containers under drips, lay towels down, and move furniture, electronics and rugs out of the way. If water is pooling above a drywall ceiling and the ceiling is bulging, a small hole at the lowest point, with a bucket underneath, can drain it in a controlled way and prevent a larger section from collapsing.

3. Document everything

Take photos and video of the water, the ceiling, damaged belongings, and the roof from the ground if you can do it safely. Note the date and time. If you end up filing an insurance claim, this record matters, and it also helps your roofer find the source faster.

Roof damage and home insurance in California

4. Get the roof covered by a licensed roofer

The goal in a storm is to stop water coming in until a permanent repair can be done safely. On a pitched roof that usually means a properly secured tarp that extends over the ridge so water runs off it, not under it. On a flat roof it can mean a temporary patch or cover over the failed area, and clearing clogged drains or scuppers that are backing water up.

A tarp is a short-term fix. Wind and sun break tarps down, and a badly installed one can tear in the next storm or damage the roof underneath. Plan on a permanent repair once the weather allows.

5. Be careful who you hire in a hurry

Storms bring door-to-door contractors. Before you let anyone on your roof, check that their license is active on the Contractors State License Board website. For home improvement work in California, the down payment is generally limited to 10 percent of the contract price or $1,000, whichever is less. Ask for a written scope and price before work starts, even on an emergency call.

6. After the rain: find the cause and fix it properly

Once the roof is dry, it should be inspected to find where the water actually got in. The stain on your ceiling is often several feet away from the real source, because water travels along rafters and decking before it drips. A proper repair addresses the cause, whether that is flashing, a failed pipe boot, a clogged drain or worn roofing.

How to find a roof leak

How we handle storm calls

Ascender Roofing Solutions answers emergency calls 24/7 during the rainy season. We install temporary protection to stop active leaks, photograph what we find, and follow up with a free inspection and a written quote for the permanent repair. Licensed C-39 roofing contractor, License 1163569.