Is It Dry Rot? How to Tell, and What to Do Before the Rain Comes Back
A screwdriver, two minutes, and the six places rot starts on Clark County homes. How to tell cosmetic weathering from real rot, and why late summer is the right time to fix it.
Here is the two-minute test: press a screwdriver into the suspect wood with light hand pressure. Sound wood resists and the tip skates. Rotted wood gives, crumbles, or lets the tip sink in. Add the other signs (paint that bubbles or peels in the same spot every year, dark staining at joints, wood that looks dry and blocky like burnt firewood, a musty smell near a window or door) and you have your answer without opening a wall. In Clark County, if you found one soft spot, it is worth checking the usual suspects below, because rot rarely travels alone.
Dry rot, wet rot: the name that confuses everyone
Dry rot is a misleading name. All rot is a fungus, and every rot fungus needs moisture to get started. The type called dry rot is simply the one that can carry moisture along its growth into wood that would otherwise stay dry, which makes it the more aggressive spreader. For a homeowner the distinction changes nothing about the fix: find the water, stop it, replace what failed. Anyone who quotes you a rot repair without explaining where the water is coming from is selling you the same repair again in three years.
The six places rot starts here
- Window sills and the trim below them, where water sits after every storm
- Door frames at the bottom corners, especially doors without an overhang
- Fascia boards behind clogged or leaking gutters
- Siding butt joints and the bottom edge of siding runs, where end grain drinks water
- Deck posts at their base and deck framing at the fastener lines
- Anywhere two roof lines meet a wall and flashing was done poorly
Why late summer is the moment
Rot spreads while wood is damp, which here means October through May. August and September are when the wood is at its driest, repairs cure properly, and new work can be primed and sealed before the wet season starts the clock again. A rot repair completed in September faces its first winter protected. The same repair booked in November happens on a wet wall, costs more to do right, and the damage kept growing while you waited on the schedule.
What a proper repair includes
Trace the moisture path and fix the cause. Remove the failed wood past the visible damage, because rot runs ahead of what you can see. Replace with sound material, then prime and seal every cut edge before the rain returns. That sequence is the difference between a repair and a redecoration.
And if you would rather never run the screwdriver test yourself: catching rot while it is a trim board instead of a wall is precisely what the Proactive Path seasonal checks exist to do. Our members hear about soft spots from us, in a written report, while the fix is still small.
Found a soft spot, or want us to check the six places on your home before winter? We trace the cause, fix what failed, and seal it against the season. See Rot Repair