Key Takeaways
- Most skylight leaks in Cottage Grove start at the flashing around the curb, not the glass, and the uphill side is where needles and leaves dam water.
- Fog between the panes means a failed glass seal, which is a replacement issue; drips on the inside of the glass in cold weather are usually condensation.
- If your roof is due for replacement within a few years, replace the skylight at the same time so the new flashing ties into new underlayment.
- A skylight should always be installed by the roofing crew, because the roof and the skylight share one waterproofing system.
- HOMEMASTERS Eugene repairs and replaces skylights in Cottage Grove, Creswell, Lowell and Pleasant Hill. Call (541) 204-4462 for a free written estimate.
HOMEMASTERS Eugene | Owens Corning Platinum Preferred, CertainTeed ShingleMaster and GAF certified | (541) 204-4462
You might think a skylight that leaks needs new glass. In Cottage Grove it almost never does. The glass or dome is usually fine; what fails is the flashing that connects the skylight to the roof, or the seal between the panes, and the right fix depends on which one it is. HOMEMASTERS Eugene, reachable at (541) 204-4462, repairs and replaces skylights across Cottage Grove and southern Lane County. Before the wettest months arrive, here is how to judge whether your skylight needs a repair or a replacement.
Why Do Skylights Leak More Often in Cottage Grove?
Cottage Grove sits at the southern end of the Willamette Valley, where the valley narrows between the Coast Range and the Cascade foothills. Rain here is steady and long through the wet season, and many neighborhoods have mature fir, oak and maple close to the roofline. That combination is hard on skylights for one specific reason: a skylight is a box that sticks up out of the roof, and everything flowing down the roof has to go around it.
On the uphill side of the curb, needles, leaves and moss collect and form a small dam. Water backs up behind the debris, sits against the flashing, and eventually finds its way under it. A skylight that was perfectly sound in August can start dripping by November simply because the debris load changed.
Is It a Leak or Condensation?
This is the first question we answer on any skylight call, because the fix is completely different.
- Condensation forms on the inside surface of the glass when warm, humid indoor air meets cold glass. You see drips on cold mornings, often in bathrooms and kitchens, and the problem fades on mild days. The cure is ventilation and humidity control, not roofing.
- A flashing leak shows up during or after rain, regardless of temperature, and usually stains the drywall at the corners of the light shaft, most often on the uphill side.
- A failed glass seal shows as fog or haze between the panes of an insulated skylight that you cannot wipe away. The unit has lost its insulating gas, and it cannot be repaired in place.
What Can Be Repaired, and What Needs Replacement?
A skylight with sound glass and a recent installation can often be repaired by cleaning out the debris dam, replacing damaged step flashing or the head flashing at the top of the curb, and resealing. That makes sense when the skylight itself has years left.
Seeing stains around your Cottage Grove skylight after the first fall storms? Call HOMEMASTERS Eugene at (541) 204-4462 or visit the HOMEMASTERS Eugene location page to book a free written estimate.
Replacement is the better choice when:
- The glass seal has failed and the panes are fogged.
- An older plastic dome has gone cloudy, brittle or crazed from years of sun.
- The skylight was installed with surface sealant instead of a proper flashing kit, which is common on older homes and always fails eventually.
- The wood curb or the decking around it has softened from repeated leaks.
- Your roof is near the end of its life, so any repair would be torn out within a few years anyway.
Should You Replace a Skylight When You Replace the Roof?
In most cases, yes. A skylight and a roof share one waterproofing system: underlayment, ice and water shield around the curb, step flashing woven into each shingle course, and a head flashing that sheds water around the top. When the roof is replaced, all of that is rebuilt. Reusing an old skylight means tying brand new roofing into an aging unit and its old flashing, which is where the next leak will start. We install VELUX skylights with the manufacturer’s matched flashing kit, which you can read about on the VELUX website, and we handle the skylight and the roof replacement with the same crew so nothing falls between two contractors.
How Can You Protect a Skylight Through the Winter?
Keep the uphill side of the curb clear of needles and leaves, especially after windstorms. Trim branches that drop debris directly onto the skylight. Use bathroom and kitchen fans to keep indoor humidity down, which reduces condensation on the glass. If you see a stain, call before the drywall softens; small flashing repairs are inexpensive compared with replacing a rotted curb. Homeowners farther up the valley can reach the HOMEMASTERS Salem roofing team for the same service.
Frequently Asked Questions About Skylights in Cottage Grove
Replace a skylight when the panes are fogged from a failed seal, a plastic dome is cloudy or brittle, the curb or surrounding decking has rotted, or the roof around it is due for replacement. If the glass is sound and the problem is the flashing, a repair is often enough. Call HOMEMASTERS Eugene at (541) 204-4462 for an assessment.
Condensation forms on the inside of the glass on cold mornings and fades in mild weather, while a leak appears during or after rain and usually stains the corners of the light shaft. Fog between the panes is a failed seal rather than either one.
In most cases, yes. The new roof rebuilds the underlayment and flashing around the skylight, and tying new roofing into an old unit is a common source of future leaks. Replacing both at once with the same crew gives one continuous waterproofing system.
Often, yes. If the glass is sound and the skylight was installed with a proper flashing kit, clearing debris and replacing damaged flashing can stop the leak. HOMEMASTERS Eugene will tell you plainly which option makes sense at (541) 204-4462.
Yes. HOMEMASTERS Eugene installs, repairs and replaces VELUX skylights in Cottage Grove, Creswell, Lowell, Pleasant Hill and across Lane County. Call (541) 204-4462 for a free written estimate.
Want your skylight sorted out before the heaviest rain arrives? Call HOMEMASTERS Eugene at (541) 204-4462 or visit the HOMEMASTERS Eugene location page. Estimates are free, written and itemized, with no pressure to buy work you do not need.
