Level 1 sweep and inspection to the NFPA 211 annual standard - flue, crown, cap, and flashing checked and photographed
Chimney sweep logs do not sweep chimneys. They loosen some creosote - which then falls where a brush and vacuum still have to collect it.
HeatShield Crown Repair: The Denver Owner’s Guide
HeatShield crown repair in Denver typically runs $380-$720 installed, depending on crown size and whether the underlying concrete needs resurfacing before the HeatShield Cerfractory foam application. We stock HeatShield-compatible crown repair materials on every truck, and most jobs are completed in a single visit once the written scope is approved. Most Denver homeowners discover the problem during a routine sweep or after spotting fresh water stains on the fireplace face following a spring storm.
Which HeatShield Models This Applies To
HeatShield manufactures crown repair systems, not discrete part numbers. The product you’re looking for is the HeatShield Cerfractory CrownCoat or the HeatShield CrownSeal application, both of which are compatible with any masonry chimney crown regardless of the flue liner brand below it. The key identifier is the crown’s dimensions and condition, not a model stamp.
Here’s how we match it: we measure the crown’s width, slope, and crack pattern, then select the appropriate HeatShield foam density and topcoat thickness. The Cerfractory formula is rated to 2,900°F, which matters in Denver’s altitude where draft patterns run hotter and faster than at sea level. We source HeatShield materials through Haven’s buying network alongside DuraFlex and Gelco products, and we do not use generic refractory cement as a substitute. The OEM foam-and-topcoat system carries a 20-year warranty when applied to manufacturer spec. We document the batch number and application thickness in your photo record, Clause 4 of the Haven Standard.
Signs Your HeatShield Crown Repair Is Failing

- Hairline cracks spidering across the crown surface. These form when the original concrete crown expands and contracts through Denver’s freeze-thaw cycles, typically widening each winter as water enters and ice forms. HeatShield Cerfractory foam is designed to bridge these cracks without the same thermal expansion rate.
- Water pooling on top of the crown instead of shedding toward the edges. A properly sloped crown sheds water within minutes of a storm; flat or reversed-slope crowns channel water into the masonry below. In Park Hill and Stapleton, we see this frequently on 1990s builds where the original crown was poured level.
- Spalling or flaking concrete at the crown’s edges. This exposes the brick or block underneath to direct moisture intrusion and accelerates deterioration of the chimney’s top course. The freeze-thaw in Denver’s shoulder seasons turns minor spalling into major crown loss inside of three years.
- Dampness or white efflorescence staining on the firebox walls. This indicates water is already migrating past the crown, through the smoke chamber, and into the flue system. By the time you see this, the crown has been compromised for at least one full weather cycle.
- Loose or missing pieces of the existing crown coating. If a previous repair used standard mortar or non-flexible sealant, Denver’s temperature swings will pop it off in sheets. HeatShield’s Cerfractory bond is chemical, not mechanical, and flexes with the substrate.
Before
AfterReplacement Cost & What’s Included
| Scope | Price Range |
|---|---|
| HeatShield Cerfractory foam application, crown intact but cracked | $380-$520 |
| Crown resurfacing plus HeatShield application | $520-$720 |
| Full crown rebuild with HeatShield topcoat | $720-$1,100 |
The range depends on crown square footage, accessibility (steep roof pitches in Cherry Creek or Hilltop add ladder time), and whether the existing crown is sound enough to resurface or must be removed. Every quote includes the NFPA 211 Level 2 camera inspection, written scope, and documented photo record. Materials are sourced through Haven’s buying network specifically to keep customer prices honest. The 365-Day Done Right Promise applies to all crown work.
DIY or Call Us?

You can safely check your crown from the ground with binoculars after a storm: look for new cracks, missing chunks, or standing water. Do not climb the roof to probe the crown. The concrete edge is often crumbly and disguises the true drop below, and Denver’s clay tile roofs are unforgiving.
HeatShield application requires surface prep to bare concrete, precise foam mixing ratios, and trowel technique that determines whether the warranty holds. The product is not sold retail in Colorado, and application without factory training voids coverage. Corrine Halstead and her crew have applied HeatShield systems in Denver since the product entered the regional market, and we carry the manufacturer’s specified tools and moisture meters on every truck. The camera doesn’t guess. Neither do we. For a written price before any work starts, call (720) 674-7312.
FAQs
With proper application, the Cerfractory system is warrantied for 20 years and typically outperforms that in Denver’s dry climate. The critical factor is the underlying concrete: if the crown structure is sound when we apply HeatShield, the repair lasts. If the concrete continues to deteriorate beneath the foam, we’ll tell you during the camera inspection and quote the rebuild instead. Call (720) 674-7312 for an exact quote - estimates are free.
Yes, if the crown is structurally sound with no exposed rebar, no through-cracks wider than 1/8 inch, and at least 2 inches of remaining concrete thickness. We verify all three with a sounding hammer and visual inspection before writing the scope. When any of those conditions fail, we quote resurfacing or rebuild rather than repair. Call (720) 674-7312 for an exact quote - estimates are free.
Most crown repairs are completed in 2-4 hours of on-site time, plus cure time before the topcoat can be exposed to rain. We schedule around Denver’s weather patterns and will not apply HeatShield if precipitation is forecast within the cure window. Your written scope includes the expected timeline before anyone starts.
We stock HeatShield Cerfractory foam, CrownCoat, and CrownSeal on every service truck, procured through Haven’s buying network. No special order delays. If your job requires a full crown rebuild rather than resurfacing, we pour custom-formed crowns on-site with locally sourced concrete and apply HeatShield topcoat in the same visit once cure allows.
Written by Corrine Halstead, Owner, Level Two Chimney Denver at Level Two Chimney Denver, serving Denver and nearby areas.





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