Spokane winters bring repeated freeze-thaw cycles that crack sealant beads and lift step flashing around skylights on homes built from the 1950s through the 1990s in neighborhoods such as South Hill, Perry District, and Browne's Addition. Older curb-mounted units often sit on single-ply underlayment that has dried out, allowing meltwater to track under shingles during spring runoff. We inspect the entire skylight assembly, including the cricket if present, because leaks frequently appear two or three courses downslope from the unit itself.
Modern polycarbonate or acrylic domes expand and contract differently than the surrounding asphalt shingles, so we use high-temperature butyl tape and counter-flashing rather than standard caulk. On steeper Spokane roofs we add snow guards above the skylight to reduce sliding loads that shear fasteners. Access on many South Hill homes requires roof jacks because of the 8-in-12 pitches common in the area.
We also check attic ventilation; blocked soffits in older Spokane stock trap moisture that condenses on the skylight frame and drips inside even when the exterior seal is intact. Every repair includes a water test from the roof once the work is complete so homeowners see the fix before we leave the job.
Code notes for Spokane County require that any skylight work on homes built before 1978 include a check for proper cricket sizing when the roof pitch is below 4:12, and we document the existing flashing condition for insurance purposes when wind-driven rain events occur.
Technician insight
In Spokane the thing that catches most people out with skylight leak fix is assuming the leak is at the skylight when it is actually meltwater tracking under lifted flashing from an ice dam two feet upslope; the repeated freeze-thaw on South Hill roofs makes that migration common.
South Hill ice-dam leak
Water stains appeared on a bedroom ceiling after a March warm spell. We found the skylight cricket buried under compacted snow with failed step flashing allowing water to run under the shingles. We replaced the flashing, added heat cable above the unit, and improved the cricket angle. No further leaks occurred through the next winter's snow cycles.
Skylight Leak Fix Services We Offer
✓Skylight Flashing Repair
Replaces corroded step and apron flashing on older Spokane roofs to restore a continuous water-shedding plane around the skylight curb.
✓Sealant Replacement
Removes failed polyurethane caulk and installs high-temperature butyl tape rated for Spokane's freeze-thaw cycles.
✓Ice Dam Leak Prevention
Adds heat cable and improves cricket detailing on skylights in neighborhoods where heavy snow accumulation creates repeated ice dams.
✓Curb Height Extension
Raises low-profile skylights on 1950s–1970s Spokane homes so new roofing layers clear the curb and prevent ponding.
✓Skylight Glass Panel Replacement
Swaps cracked or fogged acrylic or glass panels while preserving the existing frame on South Hill and Garland District homes.
✓Attic Condensation Correction
Improves ventilation and adds insulation baffles around skylight shafts to stop interior moisture that mimics exterior leaks.
Skylight Leak Fix Cost in Spokane, WA
| Service | Typical Range | What Affects It |
|---|---|---|
| Flashing and sealant repair | $350–$750 | Single skylight on standard-pitch roof; increases with steep South Hill access or multiple units |
| Full skylight replacement | $900–$1,800 | Includes curb work and new flashing; higher on two-story homes or when structural curb repair is required |
| Ice dam heat cable addition | $450–$950 | Per skylight run; price moves with roof length and electrical access |
| Attic ventilation correction | $200–$450 | Baffles and insulation work around the shaft |
Ranges are typical for Spokane, WA and confirmed with an exact written quote before any work starts.
How it works
- 1
Roof Inspection
We walk the roof and attic to trace water stains to the exact skylight penetration, noting snow load patterns typical in Spokane.
- 2
Leak Diagnosis
We remove shingles around the curb to inspect flashing, underlayment, and sealant condition before any repair begins.
- 3
Targeted Repair
We install new flashing, tape, and sealant matched to the roof slope and exposure on your Spokane property.
- 4
Water Test and Cleanup
A controlled hose test confirms the fix; we then reinstall shingles and remove all debris from the job site.
Pricing
Most Spokane skylight leak repairs fall in the mid-hundreds to low-thousands depending on access, skylight size, and whether flashing or the entire unit needs replacement.