Ask around Roseburg and you'll hear two opposite opinions about skylights: "best thing we ever did for our dark kitchen" and "never again — it leaked for years." Both are telling the truth. The difference between those two houses is almost never the glass. It's the flashing, the age of the unit, and whether anyone made the right call at reroof time.
Why old skylights leak (hint: it's not the glass)
A skylight is a hole in your roof, and holes are only as good as what surrounds them. When we trace a "leaking skylight" in Douglas County, the water is almost always getting in at one of three places:
- The flashing. Old installs were often done with roofing cement and improvisation instead of the manufacturer's step-and-head flashing kit. Mastic dries, cracks, and fails — usually within a decade, always eventually.
- The seal between frame and roof. Gaskets and seals age in our wet/dry cycle just like shingles do. A 20-year-old skylight is running on 20-year-old rubber.
- Debris damming. Fir needles pile up on the uphill side of the skylight, hold water against the flashing, and give it time to find a way in. (Our membership exists partly because of this exact failure mode.)
Cracked or fogged glass happens, but it's the rare case. So when someone quotes you a whole new skylight for a leak, or conversely smears tar on it and calls it fixed, be skeptical in both directions — an honest repair diagnosis starts at the flashing.
Curb-mount vs. deck-mount, in plain English
- Curb-mounted skylights sit on a raised wooden box (the curb) built on the roof, with flashing wrapped around the box. They're the traditional style, easy to replace like-for-like, and standard on low-slope sections. The curb raises the glass above sheet water flowing down the roof.
- Deck-mounted skylights fasten directly to the roof deck and sit lower and sleeker, sealing to the deck with an engineered flashing kit. Less visual bulk, a tighter thermal envelope, and one less assembly to age — the usual pick for new installs on normally pitched roofs.
Neither is "the leaky one." Both are reliable when the correct flashing kit for your roof material and pitch goes on with them — and neither is reliable without it.
The replace-during-reroof rule of thumb
Here's the rule we give every customer: if your skylight is more than about 10 years old and you're replacing the roof, replace the skylight too.
The reasoning is simple math. During a roof replacement, the shingles and flashing around the skylight are already coming off — swapping the unit adds modest cost. Doing the same swap three years later as a standalone job means opening up and re-flashing a section of your brand-new roof, at several times the price. And a new 20–25 year roof wrapped around a skylight with 5 years of seal life left guarantees you'll face exactly that choice. It's the single most common "wish someone had told me" we hear.
While the roof is open
Reroof time is also when adding a skylight is cheapest — the crew, flashing work, and disposal are already on site. If your kitchen or hallway has always been a cave, mention it during the estimate. It costs nothing to price.
Condensation: the fake leak
Every winter we get calls about skylights "leaking" on clear cold days. That's condensation: an Umpqua Valley household generates a lot of indoor moisture (cooking, showers, breathing, wood stoves with kettles on top), it rises into the skylight well, and it condenses on the coldest surface in the room — the glass — then drips.
How to tell the difference: condensation appears on cold mornings regardless of rain and beads evenly on the glass; a real leak tracks with rainfall and usually stains one corner of the well. Managing condensation is about moisture, not roofing: run bath fans long enough to actually clear steam, vent the dryer properly, crack windows on mild days, and when replacing, choose insulated dual-pane units, which keep the interior glass warmer and mostly dry. Our winter roofing guide covers the broader cold-weather moisture picture.
The payoff: light in a gray winter
Now the reason to bother. From October to May, the Umpqua Valley lives under a lid of cloud, and window light comes in low and weak. A skylight harvests light from straight overhead — the brightest part of even an overcast sky — and a single unit can transform a room that windows never will. North-facing rooms, kitchens buried in the middle of a floor plan, and stairwells benefit most. For many customers it's less about wattage saved and more about how the house feels in February. That's not nothing here.
Tube skylights: the small-room cheat code
For hallways, bathrooms, closets, and pantries, a full skylight is overkill — but a tubular skylight fits. A small dome on the roof feeds sunlight down a mirror-finish tube to a ceiling diffuser that looks like a light fixture. The roof penetration is compact and simply flashed (easier to keep watertight than a full curb), no framing or drywall wells are needed, and the light output genuinely surprises people. If you have one dark hallway that bugs you, this is the proportionate fix.
Getting it done right
Whether it's re-flashing a drip, swapping units during a reroof, or cutting in new light, skylight work is roofing work — the glass is the easy part, the watertightness is the trade. We flash every unit to the manufacturer's kit spec, and if you're budgeting a full project, our replacement cost guide explains where skylights fit in the numbers. Members get their skylight flashing and uphill debris checked at every visit — from $49/month, photo report included.
Quick answers
Do skylights always leak in rainy climates?
No — modern units with proper manufacturer flashing kits handle our 130 rainy days fine. The reputation comes from old units and improvised installs.
Should I replace skylights when I replace my roof?
If they're roughly 10+ years old, yes. It's a fraction of the cost of a standalone swap later, because the roof is already open.
Why does my skylight drip when it isn't raining?
That's condensation on cold glass, not a leak. Manage indoor moisture and ventilation; insulated dual-pane units mostly cure it.
Are tube skylights worth it?
For small dark rooms — hallways, baths, closets — they're one of the best light-per-dollar upgrades in gray-winter Oregon.