The situations described here are composites drawn from the types of jobs and decisions we encounter regularly. Names and specific figures are illustrative.
The call came in mid-October, right when the maples on Western Avenue were turning and every homeowner in the Capital Region suddenly remembered their roof exists. A woman in a Guilderland colonial off Route 20 had a brown ring on her hallway ceiling, directly under the skylight in the second-floor bath. It had shown up after the first hard rain of the fall. She had two questions for a roofer in Guilderland, NY: was it the skylight or the roof, and could it wait until spring.
The honest answer to both was: probably neither, and no.
Where these calls usually start
Guilderland has a very particular housing stock. The stretch from Western Avenue out to Altamont is full of colonials built in the late 1980s and through the 1990s — two-story, vinyl-sided, with 4/12 or 5/12 asphalt roofs that were meant to last twenty to twenty-five years. Most of those roofs are now on their second life, and a lot of them have a skylight or two in a bathroom or over a stairwell that was installed the same day the shingles went down. The skylight and the roof are the same age. When one starts to go, the other is usually not far behind.
The homeowner on this job had bought the house in 2011. The prior owner had told her, honestly, that the roof was original. She had done the math and expected somewhere around 2020 to be roof replacement time. Then 2020 happened, and 2021, and life pushed the roof down the list. By the time the ceiling stain showed up, the shingles were closing in on thirty years old.
What we found on the ladder
Up on the roof the story was legible in about ten minutes. The shingles were three-tab, not architectural — you can tell because you can see the individual cutouts baking into the deck line. A lot of granules had washed off, so the mats looked shiny and dark instead of textured. Several tabs on the south face were curled at the corners. The ridge cap over the bathroom bump-out had two shingles that were lifting enough to slide a finger under.
The skylight itself was a curb-mounted acrylic dome unit — probably original to the house. The flashing kit around it was aluminum step flashing sandwiched under the shingles on the sides, with a factory apron at the bottom and a saddle at the top. From above, the apron looked fine. What was not fine was the caulk. Someone, at some point, had run a heavy bead of white sealant around the entire perimeter of the curb. That is almost always a sign that a previous leak was caulked instead of reflashed. Caulk on a skylight buys you two or three years. Then the sun cooks it, it cracks, and water finds the same path it found the first time.
Inside the attic we pulled back a corner of the insulation batts and shined a light on the sheathing around the skylight shaft. The plywood on the uphill side of the curb was dark and soft along a stripe about four inches wide. Not rotted through, but past the point where a bead of caulk was going to solve anything.
The first fork in the road
Most homeowners ask me at this point whether we can just reflash the skylight and leave the rest of the roof alone. The mechanical answer is yes. Reflashing an existing curb-mounted skylight properly means pulling the shingles back three courses in every direction, removing the old step flashing and apron, cleaning the curb, installing new ice and water shield up the sides and across the top saddle, running fresh step flashing under new shingles, and setting a new apron across the downhill side. On a 1990s Guilderland colonial with a bathroom skylight in an easy-to-reach spot, that is a one-day job for a two-person crew. It usually lands somewhere between $1,400 and $2,200 depending on the size of the unit and how far we have to work outward to hit undamaged shingles.
That price assumes we can reuse the skylight itself. If the acrylic dome is crazed, or the interior gasket has given up, or the curb is soft, we are no longer reflashing — we are replacing. A modern deck-mounted skylight with a proper factory flashing kit, professionally installed, tends to run $2,400 to $3,800 in this market, and that is before any drywall repair on the inside.
The friction is that reflashing a thirty-year-old skylight on a thirty-year-old roof is a decision you often regret within four or five years. The shingles you are pulling back are brittle. They break when you lift them. You end up feathering in patches that never quite match. And when the roof itself needs to come off two winters later, everything you paid to redo around the skylight gets torn off with it.
The second fork: does the skylight even belong there?
This is the conversation most homeowners are not expecting. A skylight over a bathroom sounded like a good idea to a builder in 1993 because it added natural light to an interior room without adding a window. In practice, bathroom skylights are the single most common source of ceiling stains we see on Guilderland roofs. Bathrooms produce warm, wet air. That air rises. If the skylight shaft is not sealed and insulated to modern standards — and on 1990s builds it usually is not — you get condensation on the underside of the glass, which drips, which looks exactly like a roof leak. Sometimes it is a roof leak. Sometimes it is the bathroom itself, sweating on cold glass, and no amount of flashing work will fix it.
On this house, we walked the homeowner through the option of eliminating the skylight entirely during the roof replacement. That means framing the opening closed with new joists and sheathing, running the new roof over it as if it was never there, and patching the ceiling on the inside. Priced as part of a full roof replacement, closing a small skylight opening usually adds $600 to $1,100 to the job, plus whatever the interior drywall and paint costs. Compared to the $2,400-plus for a new deck-mounted unit that will also eventually leak, and the ongoing condensation issue in that bathroom, the math tilted one direction pretty quickly.
She kept the skylight over the stairwell — that one had never leaked, the shaft was drier, and the light in that hallway genuinely matters. The bathroom skylight went away.
Why we did not do the flashing repair alone
The version of this job where we just reflash the skylight and hand her a bill for $1,800 was on the table. She asked for it, more than once. What we told her was: your shingles are past their service life, your sheathing under this skylight is already wet, and if we spend a day making the skylight watertight we are still leaving you with a roof that will not make it through another winter without more problems. That is not a repair, that is a delay. If you want to delay, delay — but understand that is what you are paying for.
She thought about it for a week and came back for the full replacement. The relevant details of the job that went out the door: tear off down to the deck, replace roughly sixteen square feet of sheathing on the uphill side of the old skylight opening, frame and sheathe the opening closed, ice and water shield along the eaves and up all valleys, synthetic underlayment over the field, architectural shingles rated for high wind, new drip edge, new step flashing at the chimney and every wall intersection, ridge vent to replace the two static box vents that were leaking their own small amount, and haul-off. The final invoice on a roof that size in Guilderland at 2025 pricing tends to land in the $14,000 to $18,000 range depending on pitch access and shingle grade. She was toward the middle of that band.
The moment where more money stops making sense
The homeowner asked, honestly, whether she should be looking at metal instead of asphalt on a house she planned to sell inside ten years. This is the point where I tell people to stop spending. A standing seam metal roof on a Guilderland colonial the size of hers would have been another $12,000 to $16,000 on top of what she paid. Metal is the right call on a forever home, on a steep-pitch statement house, on a place where you are genuinely done thinking about the roof for the rest of your life. On a house you are going to list in seven or eight years, in a neighborhood where every comparable listing has asphalt, you will not get that money back at closing. A quality architectural shingle roof, installed correctly, was the right answer for this house and this owner.
If you want more on how the different shingle grades and metal options play out on Capital Region homes specifically, we walked through the tradeoffs in more detail in a piece on roof flashing and the way water actually moves under shingles, which is worth reading if a skylight or chimney sits anywhere on your roof.
What she asks now that the job is done
The questions that came up during the job are the ones that come up on almost every roof in Guilderland right now. She wanted to know how long the new roof would actually last. Twenty to twenty-five years on a properly installed architectural shingle roof in Upstate New York is a fair honest number. She wanted to know whether her homeowners insurance would have paid for any of this. Not for wear-and-tear, no. October is a fine time to replace a roof in the Capital Region. Late November gets dicey.
The other question, the one people ask quietly, is whether they should have called sooner. Usually the answer is that six months earlier would have made the same job cost the same money. She lived with a brown ring on her hallway ceiling for two months because she was afraid of what a roofer in Guilderland, NY would tell her.
What this leaves you with
If you own a 1990s Guilderland colonial and there is a skylight anywhere in the house, the two things are linked. When the roof gets close to end of life, the skylight is close to end of life. The cleanest decision is usually not the cheapest one in the moment. Sometimes the answer is to reflash and replace the roof at the same time. Sometimes the answer is to eliminate the skylight and stop having the argument.
If you are working through a similar situation on your own house and want a second set of eyes on it, our team handles this kind of decision regularly through our roof repair services in the Capital Region and full roof replacement work across Albany and surrounding towns. For a related read, our earlier piece on chimney flashing, roof leaks, and how the water finds its way in covers the same physics. If you would like us to take a look at your roof, reach out here.