Most roof leaks don't announce themselves. By the time you see water on the ceiling, it's been leaking somewhere upstream for weeks or months — and the repair bill is multiplying every day. The good news: leaks have early warning signs, and the local repair process is straightforward if you call the right roofer.
This is the master roof-leak guide. Jump to your city below for location-specific notes, or scroll for the universal "is this a leak?" checklist.
Roof Leaks in Boerne, TX
Need a roof leak repair in Boerne? RoadRunner Roofing is based in Boerne (78006), and most active leak calls in our area come in within 24 hours of a Hill Country thunderstorm. We can usually have a tarp on a leaking Boerne roof within 4–6 hours of your call during business hours.
What we see most often on Boerne roofs:
- Pipe boot failures — the #1 cause of localized leaks in Boerne homes 10+ years old. The rubber gasket around plumbing vents cracks under Hill Country UV exposure.
- Failed valleys — Boerne's heavy thunderstorm rainfall finds every weak valley. Common in homes with original shingles past 15 years.
- Limestone dust under shingles — Boerne's white limestone soil works its way into shingle laps over time, eventually creating channels for water.
- Chimney flashing failures — common on the older homes around Hauptstrasse and Boerne Country Estates.
If you're in Boerne and you're seeing any sign of a leak, we're 15 minutes away. Free diagnostic, written report, photos for your insurance file if the leak is storm-related.
Roof Leaks in San Antonio, TX
Looking for a roof leak repair in San Antonio? San Antonio's leak patterns vary dramatically by neighborhood and home age. Older inside-the-loop homes (Olmos Park, Alamo Heights, Monticello Park) have very different leak profiles than 1604-and-beyond new builds.
San Antonio leak specifics:
- Tile roofs (Olmos Park, Terrell Hills) — leaks often originate from cracked tiles or failed underlayment, not the visible roof surface. Repair requires lifting tiles to access the deck.
- Stone Oak and far north (78258, 78259) — many homes are 1990s–2000s construction with original 3-tab or first-gen architectural shingles now reaching service-life end. Frequent leaks at penetrations and valleys.
- Helotes and far west (78023) — exposure to wind-driven rain off the rural west side. Leaks frequently originate at low-pitch additions and rake edges.
- Inside Loop 410 — older homes with cedar shake conversions to asphalt frequently have inadequate underlayment. Leaks track laterally before showing up on a ceiling.
We work the entire San Antonio metro for active leaks — see our San Antonio service area for our full list of neighborhoods.
Roof Leaks in Stone Oak & North San Antonio
Stone Oak roof leak? Stone Oak's combination of mature roofs, hail exposure, and complex rooflines (cathedral ceilings, multiple valleys, heavy stucco-to-roof transitions) makes it a leak hotspot. Most Stone Oak leaks we diagnose fall into one of three categories: failed pipe boots (cheapest fix), valley breakdown (mid-range), or full underlayment failure (replacement territory).
If you're in Stone Oak and your ceiling is showing stains, the leak is almost never directly above the stain — water travels along rafters and decking before dropping. Don't patch the drywall until a roofer has located the actual entry point.
Roof Leaks in Bulverde, TX
Bulverde roof leak repair? Bulverde (78163) sees heavier wind-driven rain than San Antonio proper because of its elevation and Hill Country exposure. We see leak patterns concentrated around chimneys, satellite dish penetrations, and patio additions.
Bulverde-specific leak factors:
- Many older Bulverde homes have standing-seam metal roofs with leaks at panel fasteners or end-of-panel terminations rather than the panels themselves
- Detached structures (barns, workshops, RV covers) often have separate leak issues that get overlooked during whole-property inspections
- Rural acreage homes may not have city water inspections to flag the leak — by the time damage is visible, it's been progressing longer
Details on our Bulverde service area.
Roof Leaks in Fair Oaks Ranch, TX
Fair Oaks Ranch leak? Higher-end Fair Oaks Ranch homes (78015) often have premium roof systems — clay tile, slate, or upgraded architectural shingles — where the leak source is rarely obvious. We use moisture meters and infrared imaging on Fair Oaks roofs because the cosmetic surface is often perfect while the underlying decking is wet.
Common Fair Oaks leak sources: skylights (especially older curb-mounted skylights past 15 years), failed flashing on stone-veneered chimney enclosures, and underlayment breakdown beneath tile fields. We've worked extensively with Fair Oaks ARCs and know which repair-and-replace combinations stay within architectural guidelines. See our Fair Oaks Ranch page.
Roof Leaks in Spring Branch & Helotes
Spring Branch or Helotes leak? Both areas are underserved by inner-metro roofers who don't want the drive — which means homeowners often get told to "wait for an opening" for two weeks. We run service calls in Spring Branch (78070) and Helotes (78023) weekly. Same-day tarps, written estimates, and full repair scheduling within 48 hours.
10 universal roof-leak warning signs
Most leaks aren't sudden. They develop slowly and only become visible when damage is significant. Catch them early and save thousands in interior repairs.
1. A faint musty smell in a closet or upstairs room
Mold growth from a slow leak smells musty long before visible water appears. If a closet or upstairs bathroom suddenly smells different, check the ceiling and walls for darkening or texture changes.
2. Yellowish or brown ring stains on the ceiling
The classic warning sign. Stains progress from yellow (small/recent) to brown (significant) to dark with peeling paint (active and chronic). Don't just paint over it — find the source first.
3. Bubbling or peeling paint near the ceiling line
Often shows up at the top of an exterior wall before the ceiling itself stains. The water is tracking down inside the wall cavity.
4. Bowed or sagging drywall
Wet drywall sags. By the time it's visibly sagging, it's saturated. Don't push on it — call a roofer immediately.
5. Granules in the gutters or at downspouts
Heavy granule loss = aging shingles = upcoming leaks. A small amount is normal; a pile suggests the roof is past its service life.
6. Daylight visible in the attic
The most direct sign possible. If you can see sky from the attic side, you have a hole in the roof. Doesn't matter how small — it'll find a way to leak.
7. Damp or compressed insulation
Walk your attic with a flashlight after a heavy rain. Wet spots in insulation pinpoint leak locations even when the leak hasn't reached the ceiling yet.
8. Rusted nails or moisture marks on rafters
Rust around roofing nails on the underside of decking shows where moisture has been condensing or seeping. Even without active leaking, this is a problem developing.
9. Higher AC and heating bills
Wet insulation has dramatically reduced R-value. If your bills jump and nothing else has changed, you may have moisture compromising your insulation.
10. Birds, wasps, or squirrels at the roofline
Pests need an opening. If you're seeing wildlife at the roofline regularly, there's likely an entry point — and where pests can enter, water can too.
Texas-specific leak issues to watch for
- Pipe boot failures. The rubber gasket around plumbing vents fails after 8–12 years in Texas UV. The #1 cause of localized leaks in homes 10+ years old.
- Failed flashing at chimneys. Step flashing and counter-flashing wear out, and Hill Country storms find every weak point.
- Valley failures. Where two roof slopes meet, water concentrates. Worn or improperly installed valleys leak heavily during storms.
- Wind-driven rain at low-pitch areas. South Texas rain often comes sideways. Standard underlayment and shingle laps assume gravity-driven water.
What it costs to fix
Most leaks caught early are repairs in the $300–$1,500 range. The same leak ignored becomes a $3,000–$15,000 ceiling, drywall, insulation, mold, and roofing project.
We do free inspections across Boerne, San Antonio, Stone Oak, Bulverde, Fair Oaks Ranch, Spring Branch, and Helotes. We'll find the source, document it with photos, and give you a written report — even if the fix is something simple you'd rather do yourself. Schedule a free leak inspection →
