Longmont winters bring repeated freeze-thaw cycles that push ice against flashing and under shingles on homes built before 1980 in Old Town and Kensington. When Left Hand Creek drainage patterns send meltwater toward foundations, even small roof penetrations can flood attics within hours. We carry temporary membrane and heat tape on every truck so we can stop active leaks the same night the call comes in.
Boulder County wind events often strip ridge cap shingles on Sunset and Downtown properties, exposing felt that was never meant to stay wet for more than a few days. Older cedar and composite roofs common here delaminate quickly once water reaches the deck. Our crews check decking condition and underlayment overlap before any permanent patch so the repair lasts through the next heavy snow.
Semi-arid summers dry out asphalt shingles, making them brittle when the first wet snow arrives. Valleys and step flashing around chimneys on Roosevelt Park-era homes are the most frequent failure points we see after October storms. We carry matching shingles from local suppliers in Longmont so color and granule texture stay consistent instead of leaving obvious patches.
Technician insight
In Longmont, the thing that catches most people out with Emergency Roof Leak Repair (24/7) is ice pushing under the step flashing on the north-facing valleys of pre-1970 homes in Old Town and Kensington; the meltwater follows the same path every winter because the original flashing was never raised high enough for our snow load.
Kensington attic leak after March snow
Water stained the ceiling near a rear chimney on a 1960s ranch. We found deteriorated step flashing where repeated ice dams had lifted the original metal. After installing a temporary membrane the first night, we returned to replace the flashing and two courses of shingles, stopping the leak before the next warm-up.
Emergency Roof Leak Repair (24/7) Services We Offer
✓Ice Dam Emergency Response
Remove ice dams and install heat tape or membrane to stop meltwater from backing under shingles on Longmont homes during freeze-thaw cycles.
✓Flashing and Chimney Leak Repair
Replace or reseal step flashing and counter flashing around chimneys and vents that fail after wind-driven snow in Boulder County winters.
✓Shingle and Deck Patch
Remove damaged shingles, inspect plywood decking, and install new underlayment and shingles to match existing roofs in Old Town and Sunset.
✓Valley and Skylight Leak Sealing
Clean out debris, replace damaged valley metal, and reseal skylight curbs that allow water into attics during heavy spring runoff.
✓Gutter and Downspout Overflow Repair
Clear ice-blocked gutters and repair seams so water does not overflow onto eaves on Kensington and Downtown properties.
Emergency Roof Leak Repair (24/7) Cost in Longmont, CO
| Service | Typical Range | What Affects It |
|---|---|---|
| After-hours site visit and temporary tarp | $250–$450 | Higher after midnight or when roof access is icy. |
| Ice dam removal and heat tape install | $400–$850 | Depends on linear feet and number of stories. |
| Flashing replacement around chimney | $350–$700 | Varies with masonry condition and height. |
| Shingle and valley repair section | $300–$650 | Size of area and whether decking needs replacement. |
Ranges are typical for Longmont, CO and confirmed with an exact written quote before any work starts.
How it works
- 1
Phone Assessment
We ask about water location, roof age, and recent weather to decide whether a tarp or full repair crew is needed first.
- 2
On-Site Safety Check
Technician inspects from the ground and attic to locate active leaks without risking roof access in high winds or ice.
- 3
Temporary Containment
Install tarp, membrane, or diversion as needed to stop water entry the same night.
- 4
Permanent Repair
Return in daylight to replace flashing, shingles, or underlayment once weather allows safe work.
- 5
Final Walk-Through
Show homeowner the repaired area and note any other aging components that could fail in the next storm.
Pricing
Upfront quotes after inspection; emergency after-hours calls include a trip fee that applies toward the repair.