Hours
Mon–Fri, 7:30 AM–5:00 PM; Sat, 9:00 AM–1:00 PM
Phone
(408) 363-8052Address
9670 Monterey Rd, Morgan Hill, CA 95037
Mon–Fri, 7:30 AM–5:00 PM; Sat, 9:00 AM–1:00 PM
9670 Monterey Rd, Morgan Hill, CA 95037
Diagnosis first. Repair with clear scope.
Most leaks start at flashings, penetrations, skylights, valleys, roof edges, wall transitions, or low-slope tie-ins, not just out in the open roof field.
Winter Roofing traces the actual failure point first, then explains whether the honest next step is a localized repair, temporary stabilization, or a broader replacement conversation. If you mainly need documentation first, see our roof inspections page.
Active leak during business hours? Call (408) 363-8052 so we can help protect the interior and outline the right inspection path.
Visible symptoms and true entry points often do not line up. Water can move sideways along layers, under metal, or behind wall transitions before it finally shows itself indoors.
Interior staining is only a clue. Water can move along framing, underlayment, or roof transitions before it shows up inside the house.
We inspect the detail family first: flashings, penetrations, skylights, valleys, roof edges, low-slope tie-ins, and other transition points.
If the surrounding roof is still serviceable and the detail can be rebuilt correctly, repair stays on the table. If failure is broader, we say so plainly.
This is the part of the roof we usually inspect before we start talking about broad field failure. The goal is to find the weak detail quickly and recognize when it points to something larger than a one-spot repair.
Start at the flashing kit, curb condition, and surrounding roofing before assuming the daylighting unit itself is the only problem.
Check the boot or flashing flange first, then the laps and roof surface immediately around the penetration.
Sidewalls, headwalls, counterflashing lines, and chimneys often hide the real failure point behind finishes or trim.
When runoff concentrates, even a small weakness in valley lining, outlets, or roof-to-gutter handoff can produce a very real leak path.
Perimeter leaks often start where drip edge, starter geometry, fascia lines, and gutters stop handing water off cleanly.
One flatter roof section tied into a steeper roof can behave like a different system entirely, especially around seams, drains, curbs, and terminations.
Once the weak detail is identified, the repair scope changes by material and assembly. Runoff problems can also point toward our gutters page, while unit-specific daylighting problems may move toward our skylights & sun tunnels page after diagnosis.
Common leak-entry points: Sidewalls, chimneys, valleys, exposed nails, penetrations, skylight transitions, and eave or rake edges.
What durable repair looks like: Replace damaged shingles and rebuild the related flashing, valley, penetration, or edge detail so water sheds correctly again.
What is only temporary: Short-term dry-in while brittle surrounding shingles or broader edge work are being evaluated.
When replacement becomes more likely: Widespread brittleness, granule loss, or repeated leaks across more than one slope.
Common leak-entry points: Broken or slipped tiles, valleys, penetrations, wall transitions, and the underlayment below the visible tile surface.
What durable repair looks like: Reset or replace damaged tile only after the waterproofing layer below it and the related metal details are checked and corrected where needed.
What is only temporary: Limited stabilization while matching tile, access, or broader underlayment scope is being sorted out.
When replacement becomes more likely: Underlayment failure is appearing in several areas or multiple transitions need coordinated rebuilding.
Common leak-entry points: Penetrations, trim laps, fastener locations, wall conditions, closures, seams, and edge details.
What durable repair looks like: Correct the exact boot, trim, fastener, or seam condition with compatible methods instead of smearing over the symptom.
What is only temporary: Short-term weatherproofing while mis-cut panels, broad seam issues, or material lead times are being addressed.
When replacement becomes more likely: Panel layout problems, broad seam fatigue, or repeated movement-related failures across the roof.
Common leak-entry points: Seams, drains, scuppers, curbs, penetrations, terminations, and localized membrane damage.
What durable repair looks like: Use system-appropriate seam repair, patches, drain work, and termination correction tied to the drainage problem that caused the leak.
What is only temporary: Short-term dry-in when active water entry or weather exposure prevents the full repair from being completed immediately.
When replacement becomes more likely: Repeated ponding, wet insulation, multiple seam failures, or broader membrane aging.
Common leak-entry points: Flashing kits, curbs, adjacent roof transitions, glazing seals, and age-related unit failure.
What durable repair looks like: Reflash a serviceable unit, correct the surrounding roofing, or rebuild the curb detail when the unit itself is still worth keeping.
What is only temporary: Short-term weatherproofing while replacement units or compatible flashing components are being scheduled.
When replacement becomes more likely: The unit is cracked, seal-failed, outdated, or already moving into a broader reroof scope.
Common leak-entry points: Concentrated runoff paths, debris-heavy valleys, roof edges, headwalls, lower roof tie-ins, and roof-to-gutter handoff points.
What durable repair looks like: Rebuild the localized valley, edge, or transition detail so water exits the roof correctly instead of backing into the assembly.
What is only temporary: Debris clearing and short-term dry-in while a larger valley, edge, or drainage rebuild is being scoped.
When replacement becomes more likely: Multiple runoff paths are failing together or the perimeter has broader deterioration behind the visible symptom.
Common leak-entry points: Pipe boots, vent flashings, step flashing, counterflashing, chimney bases, and roof-to-wall conditions.
What durable repair looks like: Replace failed boots or vent flashings and rebuild the transition detail behind the roofing instead of face-sealing over it.
What is only temporary: Short-lived weatherproofing when surrounding materials are too aged to support a true rebuild on the same visit.
When replacement becomes more likely: Several penetrations and wall details are failing at once or the surrounding roof is too deteriorated to hold a durable repair.
Some work restores the roof detail. Some work only buys time. The important part is labeling each one honestly so the written scope matches what the roof actually needs.
Sealants still have a role inside certain repair details, but sealant-only thinking is not the repair philosophy on this page.
The question is not whether water can be slowed down for a moment. The question is whether the roof can be returned to a real working detail. When that answer becomes no, the more honest path is a roof replacement conversation.
Roof repair is often detail work hidden inside a larger assembly. That is why a leak stain can look small while the correct repair scope is more involved.
A water stain tells you where the roof assembly finally let water show up indoors. It does not automatically tell you where water entered the roof.
Roof-to-wall transitions, chimneys, stucco terminations, and counterflashing lines can hide the actual weak point behind finishes or trim.
A repair can be technically sound even when the exact shingle color or tile profile is no longer available. Waterproofing and appearance do not always solve on the same timeline.
Sometimes the right repair means opening a larger area so flashing, underlayment, or edge geometry can be rebuilt correctly instead of being patched from the surface.
The diagnostic logic stays the same across Winter Roofing's service area, but the first trouble spots to check can change with heat, marine exposure, runoff patterns, and how long a roof has been sitting between rain events.
Long dry periods can hide UV-aged boots, flashing fatigue, and attic heat stress until the first real winter storms arrive.
Wind-driven rain, marine exposure, and persistent surface moisture make transition details more vulnerable in coast-influenced areas.
High heat, UV stress, and concentrated winter runoff can push inland roofs toward replacement sooner than milder Bay Area roofs.
Water can travel along underlayment, framing, or transitions before it shows up inside, so the stain is often not directly below the entry point.
Flashings, penetrations, skylights, valleys, edges, drains, and roof-to-wall transitions usually fail before the broad roof field does.
Sometimes sealant belongs inside a proper repair detail, but caulk by itself is not a universal roof-repair strategy.
Yes, if the issue is isolated and the underlayment below the tile is still serviceable.
Not always. Many start at flashing, curb details, or surrounding roofing, although aging or failed units can make replacement the better answer.
Penetrations, trim laps, closures, fastener locations, and movement-sensitive details usually deserve inspection first.
Yes. Overflow, clogged drainage paths, and poor roof-to-gutter handoff can drive water back into edges, fascia, valleys, and lower roof sections.
When ponding, drain trouble, wet insulation, open seams, or curb and termination details are part of the problem.
Yes. Pipe boots, roof jacks, vent flashings, and other penetrations are common first-failure details.
Yes. Ventilation does not cause every leak, but heat and moisture imbalance can accelerate deterioration and affect how repairs are prioritized.
When leaks are recurring in several locations, surrounding materials are too deteriorated to hold a durable repair, or repair costs are starting to approach replacement territory.
Sometimes, but not always. Matching depends on age, color, profile, and what is still in production.
Tell us what the roof is doing, where the leak is showing up, and whether you need repair guidance, temporary stabilization, or a replacement recommendation.
Thank you. We got your request and someone will contact you shortly.