What a Drip Edge Actually Does
Drip edge is a thin strip of metal flashing installed along the perimeter of a roof. It runs along the eaves (the horizontal bottom edge) and the rakes (the sloped side edges of a gable roof). The metal projects out over the fascia board by about half an inch and bends down slightly, directing water away from the wood underneath.
It's not decorative. It's a functional detail that protects the parts of the roof structure most vulnerable to water damage. Without drip edge, water sheets off the roof surface and runs backward along the underside of the shingles. That water can wick into the roof deck, the fascia, and eventually the wall behind the fascia.
The 2012 International Residential Code made drip edge mandatory on all new asphalt shingle roofs at both eaves and rakes. The 2018 IRC continued that requirement. On Rebecca's 2003 house, drip edge was recommended by shingle manufacturers but not required by code at the time of construction. The International Code Council maintains the current provisions.
Why the Absence Matters More Over Time
A roof without drip edge doesn't fail overnight. It fails gradually, in a way that stays hidden for years until it doesn't.
Every time it rains, a small amount of water gets pulled back under the shingle edge by surface tension and capillary action. Some of that water lands on the roof deck sheathing, the OSB or plywood right at the edge. Over months and years, that repeated wetting saturates the wood fibers, breaks down the adhesive that holds OSB together, and starts rotting the framing behind it.
Rebecca's house was 21 years old. That was 21 years of water working on the edges of her roof deck.
The First Sign That Something Was Wrong
I told Rebecca to schedule a roofing contractor to physically look at the edges before her contingency period expired. She had five days left. She found a company that did a $175 dedicated inspection with a ladder and a moisture meter.
The contractor called her from the roof. He'd lifted a shingle at the eave near the front porch. The plywood underneath was soft. He could push his finger through it in one spot. He asked her to come outside and look at the fascia. Standing on the ground, we could all see now what nobody had noticed before. A dark stain running about eight feet along the fascia paint. The paint hadn't peeled yet, but the wood behind it was clearly holding moisture.
What the Roofer Found During the Full Assessment
He ended up spending three hours on the roof and around the perimeter of the house. His findings, which he wrote up as a formal report:
Six sections of soft or rotted roof decking along the eaves, ranging from 2 to 6 feet long. The worst area was 4 by 6 feet at the front porch corner, likely because of a gutter that had been misaligned and dumping water there for years.
Fascia rot along approximately 30 linear feet of the eaves. Some of it was hidden behind the gutter and had never been visible from the ground.
Two sections where rafter tails, the exposed ends of the roof framing behind the fascia, showed rot. These are structural members. Rotted rafter tails require carpentry work beyond simple wood replacement.
The main roof surface itself was actually in decent shape. Shingles had another 5 to 7 years of life. That made the situation especially frustrating. She wasn't buying a house that needed a new roof. She was buying a house where the roof edges had been quietly failing for two decades.
The Cost Estimate
The contractor's written estimate came in at $6,200. Here's how it broke down:
Decking replacement, including tearing back shingles to access the affected areas, replacing about 90 square feet of sheathing, and reinstalling shingles: $2,400.
Fascia replacement along 30 linear feet, including removing and reinstalling gutters: $1,800.
Rafter tail repair with sistered lumber and structural fasteners: $600.
Installing drip edge around the full perimeter of the house, roughly 220 linear feet: $1,000.
Miscellaneous flashing, sealant, and labor cleanup: $400.
Rebecca had two questions for me. First, was this estimate reasonable? I told her it was in the right range based on what the contractor had documented. Repair of hidden decking damage tends to run $30 to $50 per square foot of area accessed. His numbers were consistent with that.
Second, what should she do next?
How Rebecca Handled the Negotiation
She submitted a formal repair request to the sellers along with the contractor's written report. Not a vague ask for money. A specific document showing photographs of soft decking, moisture readings on the fascia, and a line-item estimate from a licensed contractor.
The sellers' initial response was denial. They said the roof was fine and they'd lived there 12 years without problems. Their agent suggested Rebecca was being difficult about "cosmetic" items.
Rebecca held her ground. Her agent, to his credit, backed her up once he saw the contractor's report. He pointed out that hidden decking damage is not a cosmetic issue and that any future buyer would find the same problem. Fixing it now was in the sellers' interest too because they'd already disclosed the inspection to Rebecca and would be required to disclose it to the next buyer if the deal fell through.
After three days of back and forth, the sellers offered a $4,800 credit at closing. Rebecca countered at $5,500. They settled at $5,000. She closed on the house two weeks later.
Why the Written Documentation Made the Difference
I've seen dozens of buyers try to negotiate on general inspection findings. They usually fail because the sellers' response is always some version of "the inspector is just being cautious."
What worked for Rebecca was that she moved beyond the home inspector's report before the negotiation. She got a specialist to document exactly what was wrong, quantify the repair scope, and provide a real cost estimate from a licensed contractor. That's not a cautious flag anymore. That's a documented defect with a price tag.
The National Association of the Remodeling Industry notes that specialist estimates typically carry more weight in real estate negotiations than general inspection findings for exactly this reason.
What This Situation Would Have Cost If Rebecca Had Ignored It
Let's play out the alternative. Rebecca closes on the house without pursuing the finding. She has drip edge added a year later for $1,000, because she remembered the inspection report mentioned it. She doesn't investigate what's under the shingles because she doesn't know to.
Two years later, she notices ceiling stains in the front bedroom. A roofing contractor tears back part of the roof, finds the rotted decking, and now she's looking at the same $6,200 in repairs plus interior damage. Ceiling drywall, paint, possible insulation replacement. Realistically another $2,500 minimum. And she paid full price for the house.
Instead, she got a $5,000 credit at closing. Applied that plus $1,200 of her own money to fix the problem within the first month of ownership. Total out of pocket, $1,200 for a problem that would have cost her at least $9,000 to discover the hard way.
The math on inspection findings often runs like this. It's the small line items that turn into the expensive repairs, not the obvious major ones. Foundation issues get everyone's attention. Missing drip edge does not.
What I'd Tell Any Buyer About Roof Edge Findings
Two things about roof inspections that most first-time buyers don't understand.
The first is that home inspectors are generalists. They walk roofs (or view them from ladders or drones) and identify what's visible from the surface. They aren't tearing back shingles or probing decking. Hidden damage requires a specialist to find.
The second is that inspection findings related to water management are almost always more serious than they appear. Water damage compounds. Every year that a bad flashing detail continues, more wood absorbs more moisture, more organisms colonize the damp material, more structural fibers break down.
When you see anything on an inspection report referring to flashing, drip edge, kick-out flashing, step flashing, or valley details, take it seriously. Get a roofing contractor to look at it before you close, even if it costs $150 or $200. That fee is trivial compared to what you might discover, and it gives you real leverage in negotiations.
Rebecca's story is not unusual. In 12 years of inspections I saw the same pattern maybe a dozen times. A modest-looking flag on a report turned into a five-figure surprise for a homeowner who didn't investigate before closing. The ones who investigated? They either walked away, negotiated a real credit, or bought the house knowing what they were dealing with. Any of those outcomes is better than being surprised two years in.