Common roof problems in Trenton and what the repair costs

With a median build year of 1950, many Trenton roofs sit on decking and flashing that has been patched or re-covered more than once. The usual trouble spots are chimney flashing, valleys, and the edges where an older porch or addition meets the main roof. Water finds those joints first.

Storms add to it. Mercer County logged 13 hail events of 1 inch or larger since 2015, with the largest stones at 1.5 inches, and 8 tornadoes in the same county record. Hail that size bruises shingles and knocks off granules without leaving obvious holes. The metro also gets about 26.6 inches of snow and 108.9 days a year at or below 32 F in the 1991-2020 normals at the metro State College station. That freeze and thaw cycle lifts shingle edges and opens small gaps, and ice-dam risk here is Moderate.

Start from the ground after a storm. Look for shingle pieces in the yard, dark patches where granules have worn away, and flashing that has lifted or bent around the chimney. Hail damage often shows first on the downspouts and gutters, which dent before the roof shows anything.

Inside, check the attic on a dry day with a flashlight. Dark stains on the underside of the decking, damp insulation, or daylight through the boards point to a leak path. On the ceilings below, brown rings that grow after rain usually trace back to flashing or a worn valley, not to the middle of a roof slope.

In winter, icicles along the eave with water staining on the wall below suggest an ice dam. Hail here is a February-to-August problem, peaking in July, so a roof check in late summer catches damage from that season. Roof repair in Trenton starts with a written estimate before any work starts.

Some problems cannot wait for a convenient week. Active dripping, a ceiling that sags or bulges, shingles missing after wind, and a tarp-worthy hole all call for a same-hour decision: cover the area, move belongings, and get the roof dried out before mold sets in. Roofers Hotline answers calls 24 hours a day for emergency tarping and leak repair.

Slower signs, such as granule loss, a few curled shingles or a faint stain that does not spread, can wait a short time but should not be ignored through another winter. Trenton's federal disaster record shows why: Mercer County has 22 declarations from 1965 to date, the latest being the Remnants of Hurricane Ida on September 5, 2021.

New Jersey requires home improvement contractors, including roofers, to register with the Division of Consumer Affairs. Look up any license at the New Jersey Division of Consumer Affairs.