Most rot hides in plain sight. By the time the paint bubbles, the wood under it has usually been soft for a while. Here is how to check before it spreads.
Press the trim with a screwdriver
Press, gently, on the trim around windows and at the base of the wall. Sound wood pushes back. Rotten wood gives like cork. If it gives, the paint is hiding a problem you cannot see from the curb.
Look where water sits
Rot starts where water lingers: under windowsills, behind a gutter that overflows, at the bottom course of siding. In a county where it rains most days from October on, those spots go first.
Why painting over it costs more
Paint seals moisture in. A fresh coat buys you one dry-looking winter, then the rot spreads into the sheathing and framing behind it, and a small fix becomes a big one.
What a real repair looks like
Pull a board, find how far it went, replace the soft wood, and fix the flashing or leak that caused it. Then close it back up. That order is what keeps it from coming back.
Send over a photo of the soft spot. We'll open the wall only as far as the rot actually goes, fix the leak that fed it, and the written quote names every board we touch.

