Roof Leak Repair in Hillsborough, NJ
Hillsborough Roofing finds and stops roof leaks in Hillsborough and Somerset County. The hard part of a leak is almost never the fix. It is the tracing. Water enters at one point, travels along rafters, decking, or the top of a wall, and shows itself somewhere else entirely, which is why the stain on your ceiling is a clue rather than an address. We work backwards from the stain to the entry point before anyone opens a bucket of sealant.
Water travels before it shows itself
A drip over the dining room does not mean the hole is over the dining room. Water past the shingle line lands on the underlayment or the deck, runs along the framing until something stops it, and then drops. On a low pitch it can travel most of a room. Along the top plate of a wall it can travel the length of the house.
That is why guessing is expensive. Sealant on the nearest visible defect stops the leak for exactly as long as it takes the real entry point to open again, and by then the drywall has been repainted and everyone assumes the roof was fixed. We would rather spend the extra hour finding it.
Where the water is actually getting in
Leaks group by location, and each location has a different tell from inside the attic and a different repair on the roof.
Chimney flashing and the shoulders
Chimneys are the most common leak we chase. Failure sits at counter flashing that was never let into a mortar joint, at step flashing rusted out on the sides, or at a cricket that was never built behind a wide chimney, so water and debris pile against the masonry. Crumbling joints and a failed crown send water down through the brick itself, which reads as a roof leak from inside but is not one.
Valleys and the water they concentrate
A valley carries the runoff of two planes through one channel, so anything wrong there is punished by volume. We look for shingles cut too tight or too wide in a closed cut valley, metal pans with fasteners driven through the flow line, and leaves and pine litter packed in under tree cover, which dams water sideways under the shingles.
Penetrations: vents, boots, and skylights
Every hole cut through a roof is a leak waiting for its material to age out. Split pipe boots, bath and kitchen exhaust hoods with lifted flanges, satellite mounts screwed straight through the field, skylight flashing kits reused at the last reroof instead of replaced. Small repairs, once you know which one it is.
Eaves, ice dams, and wind driven rain
Some leaks are seasonal and the roof is not defective in the ordinary sense. Ice damming at the eave backs standing water up under the shingles in a freeze-thaw week. Hard wind driven rain pushes water uphill past the sealant strip on an exposed slope. Both get fixed at the eave detail and the underlayment, not where the ceiling is wet.
How we trace and confirm it
We start inside, in the attic, with a light. Wet insulation, darkened decking, rusted nail shanks, and staining that runs along one rafter give us a direction. From there we measure back to the outside so we are looking at the right eight feet of roof rather than the right slope.
On the roof we look for defects that match what the attic showed. When a leak is intermittent, we run a controlled water test: a hose low on the slope first, then uphill section by section with someone watching inside, so the moment water appears we know which detail released it. Then we tell you whether it is one bad detail or the first of many.
Bring these to the first call about a leak
- Where the stain is, and which room and wall it sits closest to
- Whether it drips during rain, after rain stops, or only in winter thaws
- Whether wind direction seems to matter when it shows up
- Photos of the ceiling or wall over time if you have them
- Any attic access point we can reach, and roughly when the roof was last worked on
Related roofing services
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