Roof inspection in Durham

What fails on Durham roofs, specifically

An inspection is only useful if the inspector knows what this climate and this housing stock do to a roof. For a roof inspection, Durham's mix of heat, humidity, pollen, pines and the occasional remnant matters, because each one leaves a signature.

Algae on the north slope. The black streaks down the shaded side of so many roofs in Parkwood and Croasdaile are Gloeocapsa magma, and for years they are only ugly. The question is whether the granules underneath are still there. The inspector runs a hand across the streaked area; bare mat under the algae means that slope is older than it looks.

Valleys packed with needles. Loblolly needles and spring pollen collect in every valley and against every chimney, hold water for weeks, and rot the shingle edges sitting in the puddle. A cut-up 1990s roof south of NC-54 might have six valleys, and the one nobody can see from the ground is the one failing.

Boots and seal strips. Years of Piedmont summers crack a rubber pipe boot and bake the tar strip that holds each shingle down. A careful inspector lifts shingles by hand on each slope; if they come up without resistance, the roof will not survive its next remnant however it looks.

Chimneys that were flashed once. On a 1920s–50s house in Trinity Park or Lakewood the chimney was flashed with tin and tar when the house was built. The inspector checks for step flashing under the shingles and counter-flashing in the mortar; often one or both are missing, with a matching stain on the attic side.

Attics that do not breathe. A Durham attic in July runs 120–140 degrees with humid air trapped under the deck. From below, look for rusty nail tips, mold bloom on the sheathing, insulation burying the soffit vents, a ridge vent nailed on but never cut through, and bath fans dumping steam into the attic. All five are common on 1990s and 2000s houses and take years off a roof from underneath.

Board decking and extra layers. On the old houses the inspector counts layers at the drip edge and checks the deck from the attic. Wide gaps between 1x6 boards, or three layers of shingles, mean a replacement is a tear-off with a plywood overlay, and the price moves by several thousand dollars.

Three Durham houses, three different inspections

Buying or selling in the Triangle

Due-diligence periods are short, so check your contract's due-diligence date before you book anything. The general home inspector gets to the roof from a ladder, notes that the shingles look worn, and recommends a roofer. A written roof estimate a buyer can hand to their agent turns that sentence into a dollar figure, which is what a seller credit is negotiated from. Tell the roofer your deadline. Sellers use the same kind of report the other way: a written estimate of remaining life, with the boots and the valley already fixed, takes the roof off the list before the buyer's inspector adds it.

What the report says, and costs

A useful report has a photo of each issue with a plain sentence about what it is, a repair price for that item, and a straight opinion on remaining life. If the roof is sound, it should say so. Repair and replacement estimates from local roofers are usually free; a formal written inspection report typically runs $150–$300.

Feet, then drone

Drones help for the overview shot and for roofs too steep or wet to walk safely, but a drone cannot lift a shingle to test its seal, feel a soft spot in the deck, or get into the attic. A flyover is a photograph. A real roof inspection in Durham happens on foot and on your knees in the insulation.

If the report finds something, the roof repair and roof replacement pages explain what comes next and the pricing page has current ranges. For a buyer weighing a credit against a new roof, read our post on roof repair versus replacement.

What a good inspection covers, step by step

1. The ground walk. Gutters and downspouts, granules at the outlets, the trees over the house, and each slope through binoculars.
2. The roof itself. Shingle condition slope by slope, seal strips tested by hand, ridge caps, valleys, every boot and vent.
3. Flashing. Chimneys, walls, dormers, skylights and the roof edge, looking for step flashing, counter-flashing and kick-outs.
4. Layers and decking. A count at the edge, and soft spots felt underfoot.
5. The attic. Wet trails, daylight, rusty nails, mold, insulation over the soffits, the ridge vent slot and every bath fan duct.
6. The report. Photos, a sentence for each issue, a price for each repair, and a plain estimate of remaining life.

What you can check yourself first

Before you book anyone, spend ten minutes looking. Count how many repairs the roof has had in the last few years. Look at the gutters after a rain for granules. Check the ceilings on the top floor, including closets. Go to the attic hatch with a flashlight and look for dark streaks on the wood. Write down the roof's age if you know it. None of this replaces a walked inspection, but it tells you what to ask about and helps you read the report when it arrives.

Common mistakes with inspections

• Relying on a drone photo or a satellite measurement and calling it an inspection.
• Skipping the attic, which is where heat, humidity and slow leaks show up first.
• Booking too late in a due-diligence period, with no time left to get a repair price.
• Accepting "looks fine" without photos. Ask for at least one picture of each slope and of the attic.

Questions to ask before the visit

Will you walk the roof or only look from a ladder? Will you go in the attic? Is this a free estimate or a written report, and what does the report cost? Will each item have a photo and a price? When will I get it? If the roof is sound, will the report say so?

Keep the report with the house paperwork once it arrives. The next roofer, buyer or insurer will ask about the roof's age and condition, and a dated report with photos answers that faster than memory.