Storms rarely defeat a roof by brute force. They find the one flashing detail that was reused instead of replaced, the downspout that dumps against the foundation, or the soffit vent that was painted shut — and they exploit it. Most of that is findable in an hour.
Flashing fails before shingles do
The most common source of roof leaks is not worn shingles. It is the transitions — chimney flashing, sidewall step flashing, valleys, skylight curbs and plumbing vent boots. These are the details a rushed reroof reuses instead of replacing, and they are the first things to let go under wind-driven rain.
Rubber pipe boots in particular have a shorter service life than the shingles around them. If your roof is more than about ten years old and the boots have never been replaced, they are worth checking specifically.
Ventilation protects the roof from underneath
A roof deck cooked from below by trapped attic heat and moisture ages faster than the shingle warranty assumes. Balanced ventilation — intake at the soffits, exhaust at the ridge — keeps the deck dry and moderates the temperature.
In Connecticut winters it does something else important: it helps prevent ice dams, which back water up under the shingles and into the wall assembly. If you have had ice dams, ventilation and insulation are the fix, not more heat cable.
- Check that soffit vents are not blocked by insulation or old paint
- Confirm bathroom and kitchen fans vent outside, never into the attic
- Look for rust or granule loss around every roof penetration
Siding is a drainage system
Siding is designed to shed the bulk of the water and let the weather barrier behind it handle the rest. That system depends on correct flashing above windows and doors, proper laps in the house wrap, and a clear path for water to drain out at the bottom.
Bubbling paint, soft trim, or staining below a window is the visible end of a problem that started behind the cladding. Caulking over it treats the symptom and traps the water. Opening the area and correcting the flashing treats the cause.
Move water away from the house
Gutters full of last autumn's leaves overflow at exactly the wrong moment. Downspouts that discharge at the foundation deliver hundreds of gallons directly against the basement wall during a single storm.
Clean the gutters, extend the downspouts well away from the house, and confirm the soil grade falls away from the foundation. It is the cheapest exterior work you can do and it prevents some of the most expensive interior damage.