Exterior masonry chimneys collect creosote staining below the cap, algae on the shaded side, mineral runoff from rust at the cap or crown, plus the same chinook freeze-thaw weathering as the rest of the home. Hartford uses ARMA-compliant no-walk technique and heritage-mortar-safe chemistry. Standalone $250-$400 or $150-$250 add-on to roof cleaning — most clients bundle to save mobilisation cost. Interior chimney sweeping is a separate service from a WETT-certified sweep.
Creosote staining, algae, rust runoff, masonry weathering — all in one visit
Creosote staining is the most-visible chimney exterior contamination — dark soot streaks just below the cap where downdraft conditions push smoke back onto the brick or stone. Standard sodium hypochlorite soft-wash dissolves the bulk of the staining; heavy long-term deposits may need a second-visit follow-up with extended dwell or alkaline degreaser pre-treatment. Recovery is typically 80-90% on light staining, 50-70% on heavy deposits, full removal not always possible on decade-old embedded creosote.
Algae growth on the shaded side of the chimney (typically north or northwest face in Calgary) develops because the chimney protrudes above the roof and catches moisture from all directions while shading itself for part of the day. Standard soft-wash chemistry handles it cleanly. Cochrane and Bragg Creek chimneys see heavier algae pressure because of foothills humidity — twice-yearly cadence is common.
Rust runoff from the chimney cap (especially galvanised steel caps showing oxidation after 5-10 years) leaves orange-brown streaks down the masonry. Oxalic acid pre-treatment with alkaline neutralisation rinse handles most rust staining. If the cap itself is heavily rusted, replacement is recommended (separate trade) but Hartford can clean and treat what's there.
Masonry weathering — chinook freeze-thaw on mortar joints, surface efflorescence from mineral migration — is addressed by gentle soft-wash plus flagging any structural issues for masonry repair. Pair this page with brick cleaning for the heritage-mortar detail and roof cleaning for the standard add-on bundle.
Recent work
Four-step Hartford Calgary chimney exterior process
Ladder set through final rinse — ARMA-compliant no-walk method
Ladder + extension wand setup
Ladder positioned beside chimney (not on roof). Extension wand reaches chimney sides and crown. No foot traffic on shingles preserves warranty.
Chemistry application + dwell
Sodium hypochlorite for biological + alkaline pre-treat for creosote. Oxalic pre-treat for rust runoff. 10-15 minute dwell.
Low-pressure rinse top-down
Under 500 PSI from above, top-down sequence. Multiple light passes vs single heavy rinse. Cap + crown attention.
Final inspection + structural notes
Walk around chimney from ground + ladder, photograph result, note any masonry repair needs (cracking, displaced mortar) for separate trade.
Roof + chimney bundle is the standard booking
Same ladder, same crew, same extension wand — bundle saves $50-$100
Chimney exterior cleaning shares all the same equipment, crew expertise and on-site logistics as ARMA-compliant roof soft-wash. The ladder set-up time, the chemistry mix, the extension wand technique, the rinse sequence — all identical between the two services. Combining roof cleaning + chimney exterior cleaning into one visit saves the mobilisation cost (typically $50-$100 saved vs two separate visits) and ensures the cleaned chimney isn't visually mismatched against an unwashed roof or vice versa.
Most Calgary chimney exterior cleaning bookings come as roof-cleaning add-ons. The clients who book standalone chimney are typically: clients who had the roof cleaned recently (within 12 months) and just want the chimney refreshed, heritage property owners doing a specific masonry restoration project, or clients addressing a specific contamination issue (heavy creosote, rust stain from a failing cap) without needing roof work at the same time.
The quote walk includes the chimney during the roof cleaning quote by default — the estimator inspects the chimney exterior, notes any contamination types, and either includes chimney in the bundle pricing or scopes it as an add-on you can accept or skip. No surprises at the visit. Pair this page with roof cleaning for the main bundle service and specials for the bundle discount mechanism.
Written quotesPricing
Annual + as-neededCadence
Hartford chimney cleaningOutcome
Related Hartford services
Six services that pair with Calgary chimney cleaning
Roof bundle is the standard; brick and stone services apply to heritage chimney work.
Five questions about exterior vs sweeping, masonry handling, creosote, roof bundling, and cap/crown.
Two different services with different goals. Chimney sweeping is the interior service — a WETT-certified sweep removes creosote, soot and debris from the inside of the flue using brushes and vacuum, primarily for fire-safety reasons. Hartford does NOT do interior chimney sweeping; refer to a certified chimney sweep for that. Chimney cleaning (what Hartford does) is the exterior service — masonry soft-wash for the brick or stone exterior, creosote stain removal where soot has stained the brick at the crown, cap cleaning, surrounding roof section cleaning. Cosmetic and weather-protection, not fire-safety.
Yes — heritage masonry chimneys (Inglewood, Bridgeland, Mission, Mount Royal) need the same lime-mortar-safe protocol used for heritage brick walls. Standard sodium hypochlorite soft-wash with longer dwell time, low-PSI rinse, no acidic chemistry unless mineral staining requires it (and then with full alkaline neutralisation). Heritage chimneys often have additional considerations: original cast-iron caps that need careful treatment, terracotta or clay tile crown sections that mustn't be impacted, lead flashing seams that high-pressure could displace. The estimator scopes heritage chimney work specifically during the on-site visit.
Mostly yes. Creosote staining on the chimney exterior comes from soot escaping during downdraft conditions and depositing on the brick or stone just below the cap. Standard sodium hypochlorite soft-wash removes the bulk of the staining (typically 80-90% recovery on lighter staining, 50-70% on heavy long-term deposits). Embedded creosote on porous brick may need a second visit with extended dwell time or an alkaline degreaser pre-treatment. Complete removal isn't always possible — heavy deposits that have been there 10+ years often leave a permanent shadow even after best-effort cleaning.
Yes — strongly recommend it. The chimney exterior cleaning uses the same ladder setup, same extension wand reach, same crew skill set as the ARMA-compliant roof soft-wash. Combining the two into one visit saves the mobilisation cost (typically $50-$100 saved) and ensures the cleaned chimney isn't visually mismatched against an unwashed roof (or vice versa). Most clients book chimney as an add-on to the roof cleaning service rather than a standalone visit. Standalone chimney cleaning is available but typically only makes sense if the roof was cleaned recently.
Both included by default in Hartford chimney exterior service. The cap (the metal or stone covering on top of the chimney, prevents rain entry) accumulates rust, algae and bird debris — chemistry-cleaned during the visit, with rust treatment if the cap is metal and showing oxidation. The crown (the masonry capping at the top of the chimney stack, the mortar seal around the flue) is inspected during cleaning — if cracking is visible, we flag it for masonry repair (separate trade). Cleaning the crown doesn't fix structural issues but does reveal them so they can be addressed.
Calgary chimney clients
What homeowners say about Hartford chimney work
★★★★★4.9· 75 reviews on Google
★★★★★
Heritage 1928 brick chimney in Inglewood with years of creosote staining below the cap. Hartford's two-visit treatment got about 75% recovery — better than I'd hoped, and they were upfront about what wouldn't come off entirely. No mortar damage.
Homeowner
Calgary · SE · Inglewood
★★★★★
Bundled chimney with the roof cleaning. Saved the second mobilisation cost and the chimney + roof match cleanly. Crew was on a ladder, never on the shingles — ARMA-compliant as described.
Homeowner
Calgary · NW · Hidden Valley
★★★★★
Cochrane property, north-facing chimney had heavy algae. Hartford on the twice-yearly Premium plan now includes the chimney each visit. Stays clean season to season.
Homeowner
Cochrane · Heritage Hills
★★★★★
Rust streak from the chimney cap had been there for years. Oxalic pre-treatment plus neutralisation removed about 90% of it — better than I'd been told was possible. Cap replacement next year but the staining is finally manageable.
Homeowner
Calgary · SW · Lakeview
Bundle chimney with roof cleaning
Add chimney exterior to your roof cleaning quote
Same ladder, same crew, same visit — bundle saves $50-$100 vs standalone chimney work. Standard inclusion in roof cleaning quotes; ask the estimator to confirm. Standalone chimney also available if roof was cleaned recently.
