Services
Mold Remediation & Removal in Calgary
Mould after a leak, flood or sewer backup needs more than bleach. DKI Calgary provides mould remediation and removal across Calgary: we find the moisture source, contain the area, remove the mould safely and work with your insurer from inspection to rebuild.
Mold & Mildew Remediation
Mildew is surface growth, usually on tile grout, caulking or window sills, and it often wipes away. Mould is different. It roots into porous materials like drywall, insulation, carpet underlay and wood framing, and it often spreads where you can’t see it, inside wall cavities or under flooring. Once mould has grown into a material, surface cleaning won’t remove it, and bleach may lighten the stain without dealing with the growth inside.
Our remediation follows the IICRC S520 standard for mould. We isolate the affected area so spores don’t travel to the rest of your home, run HEPA air filtration and physically remove mould-damaged materials instead of just treating the surface. Salvageable framing and surfaces are HEPA-vacuumed, cleaned and treated, then the space is dried and checked before anything is closed back up.
Mould keeps coming back as long as the moisture does, so we start by finding the source: a slow leak, a past flood, poor ventilation or winter condensation. Once remediation is done, our in-house rebuild team replaces drywall, insulation and flooring, and our contents restoration team cleans and deodorizes affected furniture, clothing and belongings. One project manager runs the whole job, from disaster to done.
Our mould remediation services include:
Mould inspection and air sampling
Containment and HEPA air filtration
Removal of affected drywall and insulation
Antimicrobial treatment and deodorization
Cleaning of contents and belongings
Mould Inspection & Testing After Water Damage in Calgary
The mould you can see is usually the smaller part of the problem. After a basement flood or an unnoticed leak, growth tends to start behind baseboards, under laminate and on the back of drywall, often sooner than people expect. Our timeline shows how fast mould grows after water damage. Dark patches on drywall that stayed wet for weeks may be what people call black mould, but colour alone doesn’t tell you the type or how far it has spread.
Our team includes a project manager certified in mould inspection. We trace moisture with meters, open suspect areas carefully and take air or surface samples when lab results will change the plan. In homes built before about 1990, the drywall mud, ceilings or flooring we need to remove may contain asbestos, so we test before cutting. If asbestos is found, we handle that too, with asbestos testing and removal under the same project manager.
Signs you may need a mould inspection:
A musty smell that lingers, especially in the basement
Stains or discolouration on walls, ceilings or window frames
A leak or flood that wasn’t dried out properly
Peeling paint, warped baseboards or lifting flooring
Frost or dark staining on attic sheathing in winter
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Why Mould Shows Up in Calgary Homes
Calgary’s air is dry for most of the year, so mould here almost always traces back to a specific water problem rather than general humidity. Basement floods, sewer backups and seepage during spring melt are the most common starting points, especially in finished basements where drywall and carpet sit against concrete. If your basement has flooded before, our guide on how to prevent basement flooding in Calgary is worth a read.
Winter brings its own risks. Chinooks swing temperatures above and below freezing within days, and those freeze–thaw cycles create ice dams in Calgary that push meltwater under shingles and into ceilings. Warm, moist indoor air leaking into a cold attic can leave frost on the sheathing that melts and soaks the insulation when the weather turns. Condensation on windows during cold snaps feeds mould on sills and frames, particularly in older homes.
Summer adds hail and heavy rain, which can damage roofs and siding and let water into walls without obvious signs inside. Add slow plumbing leaks under sinks, behind dishwashers and around hot water tanks, plus bathrooms and basement suites without proper exhaust fans, and you have what mould needs to grow: moisture, a food source like drywall paper, and time.
Where we find mould in Calgary homes most often:
Finished basements after floods, sewer backups or spring seepage
Attics with winter frost build-up or ice dam leaks
Behind drywall and under flooring after slow plumbing leaks
Bathrooms and basement suites without proper exhaust ventilation
Window frames and exterior walls with ongoing winter condensation
What Happens During Mould Remediation
Most mould jobs start with a call about a smell, a stain or a recent leak. We’ll ask what you’re seeing and how long it’s been there, then book an inspection. Until we arrive, avoid scrubbing, sanding or spraying the growth, keep the area closed off where you can, and turn off fans that move air through the space.
What our crew does on a mould remediation job:
Inspect, take moisture readings and find the water source
Seal off the area and set up HEPA air filtration
Remove mould-damaged drywall, insulation and flooring in sealed bags
HEPA-vacuum, clean and apply antimicrobial treatment to remaining surfaces
Dry the structure, confirm the results and start repairs
Our project managers hold IICRC AMRT (Applied Microbial Remediation Technician) certification and follow the IICRC S520 standard. We photograph and document every stage for your insurance adjuster, and because our rebuild team is in-house, the same project manager takes you from remediation through finished repairs.
Mould Remediation Across Calgary & Area
We handle mould inspections and remediation in Calgary and the surrounding communities. If asbestos turns up during the work, our asbestos testing and removal team takes care of it too.
Frequently Asked Questions – Mould Remediation in Calgary
How much does mold removal cost in Calgary?
Typical ranges from our Calgary guide are $800 to $1,500 for a small bathroom patch of about 10 square feet, $2,500 to $5,000 for 30 to 50 square feet of basement wall, $8,000 to $15,000 or more for a full attic and $15,000 to $30,000 or more for whole-house mould after flooding. Every job is quoted after an inspection. Our mould remediation cost guide for Calgary explains what drives the price.
Does home insurance cover mould remediation in Calgary?
It often does when the mould comes from a sudden, accidental event your policy covers, like a burst pipe or an appliance leak caught quickly. Mould from long-term leaks, ongoing humidity or maintenance issues is usually excluded. Coverage depends on your policy, so check with your insurer before work starts. When it is part of a claim, we work directly with your adjuster and document both the damage and the work.
How long does mould remediation take?
Small jobs, like a patch in a bathroom, can often be done in a day. Larger projects, such as a finished basement or an attic, usually take several days to a week or more. If the area is still wet, drying adds time, and repairs to drywall, insulation and flooring follow once the space is clear. We’ll give you a realistic schedule after the inspection.
Is black mold dangerous, and how do you remove it?
“Black mould” usually refers to Stachybotrys chartarum, which grows on drywall and other materials that stay wet for a long time. Colour alone doesn’t confirm the type, and any mould growing indoors should be removed, whatever its colour. We handle it the same way: containment, HEPA filtration and removal of affected materials. If you have health concerns, speak with your doctor. Our article on whether mould is dangerous covers more.
Do I need to leave my home during mould remediation?
Usually not. We seal the work area with containment and run HEPA air filtration, so most families stay home while we work in a basement, bathroom or attic. Temporary relocation may make sense for large jobs, when asbestos is involved, or when someone in the home has breathing problems. If the work is part of an insurance claim, ask your insurer whether additional living expenses are covered.
What should I do about mould after a basement flood in Calgary?
Move quickly. Wet drywall, carpet and underlay can start growing mould within a day or two, so stop the water if it’s safe, photograph the damage, call your insurer and get professional drying started. Sewer backup water is contaminated, and porous materials it touches usually need to be removed. Our guide to what to throw out after a basement flood helps you decide what stays.
DKI Calgary Offers Premier Property Restoration Services Across Calgary and Southern Alberta
At DKI Calgary, formerly known as Rocky Cross Construction, we know that dealing with property damage is overwhelming—that’s why our franchisees are ready to respond 24/7, every day of the year. With over 30 years of industry experience and IICRC-certified experts, we bring the knowledge, speed, and care needed to restore your home or business efficiently. From the moment you call, a dedicated Project Manager will guide you through the process, keeping you informed every step of the way. Our team is committed to delivering high-quality results while providing the compassion and support you need to get back on your feet as quickly as possible. We're here for all homeowners across Calgary and Southern Alberta.
Quick Mobilization
24/7 emergency restoration and board-up services available 365 days a year.
Expertise
Fully trained and certified IICRC staff and more than 30 years of industry experience.
Strong Communication
A project Manager assigned to your claim from start to finish, updating you throughout the process.
Quality Assurance
Making sure you are happy with the final result of the work done and standing behind the work we do.
Compassionate Team
We understand how hard the situation is and our team will do what we can to get you back to normal sooner.
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