Roof Leak Inspection: Finding Where the Water Really Gets In

Patching the shingles directly above a ceiling stain is one of the most common reasons a leak keeps coming back. The stain shows where water finally dripped, not where it got in. We approach a leak from two sides: inside the attic, where the evidence is, and up on the roof, where the cause is.

Why isn't the leak right above the stain?

Because water travels before it drips. It can slip under a shingle, run down the felt or the top of the decking, follow a rafter or a pipe, and only fall once it reaches a low point or a seam in the drywall. On a sloped roof, the entry point is usually higher up the slope than the stain.

A few feet of travel is common, and in some houses the entry point sits on a different section of roof altogether. That is why we do not touch a shingle until the trail makes sense.

How we trace a leak, step by step

In the attic

• Follow water stains, darkened wood and damp insulation uphill toward their highest point
• Look for daylight around nails, pipes and vents
• Check the underside of the decking for soft spots and mold
• Note whether the dampness looks like a leak or like condensation from poor attic ventilation

On the roof

• Inspect the shingles, flashing and penetrations directly above and upslope of the attic evidence
• Look for lifted or cracked shingles, backed-out nails and worn sealant
• Check valleys, where two slopes send water into one channel
• When needed, run water over one section at a time with a hose while someone watches from the attic

Afterward

• Photos of what we found, marked and explained
• A written repair estimate, free of charge

What are the most common sources of roof leaks?

In the homes we inspect, the usual culprits are flashing around chimneys, walls and skylights, rubber boots around plumbing vents that crack with age, worn valleys, nail pops that push up through shingles, and ice dams that force meltwater under the roof edge. Storm damage and missing shingles round out the list.

• Chimney flashing: step and counter flashing pull away from brick as mortar ages, a frequent issue on older homes near downtown Lapeer.
• Pipe boots: the rubber collar dries out in the sun and cracks, letting water run down the pipe.
• Skylights: leaks often come from the flashing around the frame rather than the glass.
• Nail pops: a nail that backs out lifts the shingle above it and leaves a hole.
• Ice dams: snow melts on a warm upper roof, refreezes at the cold eaves, and the trapped water backs up under the shingles.

Could it be condensation instead of a leak?

Sometimes. In winter, warm, moist air from the house can condense on cold roof decking and drip, especially in attics with blocked vents or missing insulation. Leaks from condensation tend to show up across a wide area and on cold days, not only during rain. We check ventilation as part of every leak inspection.

Older homes near the river in Columbiaville, and other houses with little attic airflow, can be especially prone to this. The fix there is about moving air, not adding shingles.

What an inspection does not do

An inspection finds the problem; it does not fix it. If it shows rot spread across much of the deck, we will explain why replacing the roof beats another patch. If water is coming in heavily while you wait for the repair, we may recommend temporary roof sealing for a small opening or emergency roof tarping for a larger one. If the leak turns out to be storm-related, the photos and notes from the inspection can support a homeowner's claim. See insurance claims for how that works and which decisions remain in your hands.

Leak patterns around the county

Different parts of Lapeer County leak in different ways. Converted cottages at Otter Lake often have low-slope additions where water sits longer than shingles are designed for. Country homes around Metamora with many gables gather heavy rain in their valleys. Village homes in Almont with additions roofed at different times tend to leak right where old and new sections meet.

Book a leak inspection

If you can, note when the leak appears: heavy rain, wind from one direction, or melting snow. That detail helps us narrow the search.

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