Boulder Roof Pros provides professional chimney flashing in Boulder, CO for residential and commercial properties across the northern Front Range. Chimney flashing is the leak we get called about most often during a Boulder winter, and the reason is geometry. A chimney is a wall standing in the middle of a roof where snow collects, and the upslope side of it becomes a dam every single year.
Snow piles against the back of the masonry, melts where it touches a warm flue, and that water sits instead of running past. Any flashing depending on a bead of sealant or a single piece of bent metal jammed under a course will leak in that condition, and it usually shows up on a ceiling six feet away from the chimney rather than beside it.
The fix is a proper two-part system. Step flashing woven into each shingle course up both sides, counterflashing let into a saw-cut reglet in the masonry and sealed, and a site-built cricket on the upslope side of any chimney wider than 30 inches, which is what the residential code has asked for all along. The cricket is built from framing and metal, sized to shed clear of the flashing, not shimmed together out of roof cement.
We see three failures over and over. Counterflashing surface-mounted onto brick and caulked instead of cut in. Crickets left off wide chimneys because a bag of roof cement was cheaper that day. And crickets built too shallow to shed anything, which creates a flat spot in the precise location where water and ice are heaviest. The fourth is flashing laid over the shingles instead of woven into them.
Freeze cycles finish the job on the masonry itself. Spalled brick, open head joints and a cracked crown let water into the chimney from above, and no amount of flashing work stops a leak that arrives through the top of the stack. We check the crown, cap and mortar while we are up there and tell you which of the two problems you actually have. A stainless cap keeps the worst of the meltwater out of the flue.
The same details apply to every wall-to-roof intersection: dormer cheeks, a second-storey wall landing on a lower roof, and kickout flashing where a rake meets siding. That last one is a small piece of metal whose absence has soaked more wall cavities in this county than any hailstorm on record. We look for it on every leak call, because it costs almost nothing to add while a roof is open.
Our licensed and insured team brings the right materials and equipment to every job — self-adhering ice barrier run 24 inches inside the wall line, baffled continuous soffit intake vents, ridge exhaust balanced to a net free area of one to 300, blown cellulose over an air-sealed ceiling plane, clamp-on snow guards and continuous snow fences, site-built chimney crickets and reglet-cut counterflashing — and backs the work with a written workmanship warranty. We serve Boulder and nearby communities including Longmont, Louisville, Lafayette, Superior.
What We Handle
Everything our chimney flashing in Boulder covers
One crew, one point of contact, and the full range of chimney flashing work in Boulder, CO. If it is on this list we do it in house rather than handing it to a subcontractor:
- chimney flashing repair
- step flashing
- counterflashing reglet
- chimney cricket
- chimney leak repair
- chimney crown repair
- masonry chimney flashing
- dormer flashing
- kickout flashing
- wall to roof flashing
- chimney flashing cost
Not sure which one describes your situation? Describe it in plain words and we will sort it out — or browse the rest of our Boulder services.
Materials, equipment and how we do chimney flashing
The difference between chimney flashing that lasts and chimney flashing that gets redone in three years is almost always preparation and materials, not the finish you see on day one. We work with self-adhering ice barrier run 24 inches inside the wall line, baffled continuous soffit intake vents, ridge exhaust balanced to a net free area of one to 300, blown cellulose over an air-sealed ceiling plane, spec them to the job instead of to the invoice, and write the material grades into the free estimate so you know exactly what you are buying.
Every Boulder job runs the same way: site walk and measurements, written scope and fixed price, protection of the surrounding area, then the work itself with a daily clean-up. Years of roofing work in the northern Front Range means we have already met whatever your property is going to throw at us — awkward access, older construction, an HOA with opinions.
Where we do chimney flashing outside Boulder
Boulder Roof Pros covers Boulder and the surrounding communities of the northern Front Range. Crews run out to the same nearby cities every week, so an out-of-town job does not mean an out-of-town price.
- Chimney Flashing in Longmont, CO — Boulder County, population 98,885
- Chimney Flashing in Louisville, CO — Boulder County, population 21,226
- Chimney Flashing in Lafayette, CO — Boulder County, population 30,411
- Chimney Flashing in Superior, CO — Boulder and Jefferson counties, population 13,094
- Chimney Flashing in Erie, CO — Weld and Boulder counties, population 30,038
- Chimney Flashing in Niwot, CO — Boulder County, population 4,306
Start on the Boulder Roof Pros homepage for a free estimate, or call (844) 511-2320 and describe the job.
Why Boulder Chooses Boulder Roof Pros
- ✓We open the attic on every roof call, because most winter leaks in this county start above the ceiling rather than on the shingles.
- ✓Ice barrier and ventilation are priced into a replacement from the start, not sold as an upsell once the deck is open.
- ✓We measure existing soffit intake before quoting a ridge vent, since exhaust without intake pulls warm air out of the house.
- ✓Snow retention is laid out over doors, walkways and gas meters before any metal panel goes on the roof.
The standards behind chimney flashing
Quality here is not a matter of opinion — it is written down. The chimney flashing work we do in Boulder follows published industry standards: NRCA publishes the Roofing Manual, the industry's reference for details and slope minimums, and Asphalt Roofing Manufacturers Association sets the shingle application and ventilation guidance the warranties reference. If a contractor cannot tell you which standard a detail comes from, that is worth asking about before you sign.
Every chimney flashing project in Boulder gets the same attention, whether it is a single room or a full commercial job. We show up on schedule, keep the site clean, and stand behind the work — the estimate is free and there is no pressure.
Ready to get started? Call (844) 511-2320 for a free chimney flashing free estimate in Boulder, or request a quote and we'll get right back to you.