Old house repair guide
Fixing an older Calgary house: what each problem means, and who fixes it.
Plain answers, the questions to ask before you hire, and Calgary companies that do the work.
Most of the time, fixing the problem is the right call.
A repaired house is worth more, and the difference is yours. Get at least two written quotes, and ask the questions under each heading before you sign anything.
If the quotes add up to more than the house can carry, or more time and money than you have, selling it as it stands is the other way out. That part is what we do, and it is at the bottom of the page.
Poly-B plumbing
Grey plastic water pipe that went into many Calgary houses built between roughly 1978 and 1998.
Poly-B is not a guaranteed leak. The trouble is that insurers treat it unevenly: a surcharge, an exclusion for water damage it causes, or no policy at all until it is replaced. That is usually what turns it from a non-issue into the reason a sale stalls.
Signs to look for
- Grey plastic water lines, easiest to spot at the water heater, under sinks or at the main shut-off
- Your insurer asking about the plumbing at renewal
- A home inspector flagging it in a report
Questions to ask before you hire
- Whole-house repipe or part of it, and why?
- What replaces it, and how many openings in walls and ceilings?
- Is patching the drywall included, or a separate trade?
- Is the permit included in the price?
Calgary companies that do this work
Day & Knight Plumbing and Heating
Poly-B replacement and re-piping · Calgary and area
dayandknightplumbing.ca ↗ (opens in a new tab)Mr. Rooter Plumbing of Calgary
Poly-B removal, PEX or copper repiping, drywall restoration · Calgary, Airdrie, Chestermere, Okotoks
mrrooter.ca ↗ (opens in a new tab)ProStar Plumbing & Heating
Poly-B replacement with PEX or copper · Calgary, Cochrane, Airdrie, Okotoks, Chestermere
prostarplumbing.ca ↗ (opens in a new tab)Right On! Plumbing & Heating
Poly-B to PEX repipes, whole home or upper floor only · Calgary, Okotoks, High River
callrighton.com ↗ (opens in a new tab)Stampede Plumbing & Heating
Poly-B replacement with PEX or copper, pressure-tested · Calgary, Airdrie, Cochrane, Okotoks, Strathmore
stampedeplumbingandheating.com ↗ (opens in a new tab)TB Plumbing & Heating
Poly-B replacement and whole-home water line repiping · Calgary (NW) and area
tbplumbingandheating.ca ↗ (opens in a new tab)The Poly B Plumbing Guys
Whole-home poly-B removal and PEX repiping · Calgary, Airdrie, Cochrane, Okotoks, Chestermere
thepolybplumbingguys.ca ↗ (opens in a new tab)Urban Piping
Poly-B removal and whole-house repiping, drywall and paint repair · Calgary, Edmonton and Vancouver
urbanpiping.com ↗ (opens in a new tab)Quote more than the house can carry? Selling it as it stands is the other way out.
Foundation cracks and movement
Calgary is built on clay that swells when it is wet and shrinks when it is not, and older houses show it.
Some cracks are cosmetic shrinkage. Some mean the footing is moving and the fix is underpinning or piles. Working out which is the first job, and the answer should be in writing.
Signs to look for
- Stair-step or horizontal cracks in a block or concrete wall
- Doors and windows that stick or no longer latch
- Floors that slope, or a gap opening between wall and floor
- Water coming through a crack after rain
Questions to ask before you hire
- Is this cosmetic or structural, and will you put that in writing?
- Should an engineer look at it first?
- Is the warranty transferable to the next owner?
- Who restores the landscaping, steps or deck after excavation?
Calgary companies that do this work
Abalon Foundation Repairs
Crack repair, underpinning, helical piles, wall replacement, drainage · Calgary and area
abaloncanada.com ↗ (opens in a new tab)Calgary Parging
Parging, foundation crack sealing, stucco and masonry repair · Calgary, Airdrie, High River
calgaryparging.com ↗ (opens in a new tab)Groon Construction
Foundation assessments and crack injection to stop leaks · Calgary
groonconstruction.ca ↗ (opens in a new tab)Groundworks
Foundation repair, waterproofing, crawl spaces, concrete lifting · Calgary and southern Alberta
groundworks.ca ↗ (opens in a new tab)HBD Basement Foundation Protection
Foundation crack repair, interior drainage, sump pumps, waterproofing · Calgary and southern Alberta
hbdinc.ca ↗ (opens in a new tab)QC Basement Solutions
Crack repair, underpinning, French drains, sump pumps, radon mitigation · Calgary, Airdrie, Okotoks, Chestermere
qcbasementsolutions.com ↗ (opens in a new tab)Seal-Proof Contracting
Basement waterproofing, crack repair, interior weeping tile, sump pumps · Calgary and area
sealproof.ca ↗ (opens in a new tab)Quote more than the house can carry? Selling it as it stands is the other way out.
Mould
Mould is almost always a water problem first: a leak, a flood that was never properly dried, or a basement without enough air moving through it.
Removing the mouldy material is half the job. Finding and stopping the water is the half that keeps it from coming back. (American sites spell it mold; same thing.)
Signs to look for
- A musty smell, strongest in the basement or a closed room
- Staining or spotting on drywall, framing or the underside of the roof deck
- Peeling paint or bubbling near the floor in the basement
Questions to ask before you hire
- Will you find and fix the moisture source, or only remove the mould?
- How will you contain the work area and filter the air?
- Do you test afterwards to confirm it is clear?
- Who rebuilds the walls once you are done?
Calgary companies that do this work
Alberta MoldPro
Mould removal, asbestos and vermiculite removal, grow-op remediation · Calgary, Airdrie, Cochrane, Okotoks, Chestermere
albertamoldpro.com ↗ (opens in a new tab)Envirotech Abatement & Remediation
Mould removal, asbestos and vermiculite removal, popcorn ceilings · Calgary, Airdrie, Okotoks, Cochrane, Canmore
envirotechalberta.ca ↗ (opens in a new tab)JAD Environmental Services
Mould inspection, sampling and removal; air quality testing; asbestos · Calgary and Alberta
jadenvironmentalservices.com ↗ (opens in a new tab)Matrix Remediation
Mould inspection and removal, asbestos testing and removal · Calgary and Edmonton
matrixremediation.com ↗ (opens in a new tab)Mayken Hazmat Solutions
Mould remediation, asbestos abatement, hoarding and hazmat clean-up · Calgary, Alberta, BC and Saskatchewan
mayken.com ↗ (opens in a new tab)Red Dot Restoration
Mould remediation, asbestos removal, water, fire and sewage restoration · Calgary and surrounding areas
reddotrestoration.ca ↗ (opens in a new tab)Wise Abatement
Mould removal, asbestos and vermiculite removal, lead paint removal · Calgary and area
wiseabatement.ca ↗ (opens in a new tab)Quote more than the house can carry? Selling it as it stands is the other way out.
Flood, water and fire damage
A basement flood, a sewer backup, a burst pipe, a kitchen fire. The sooner it is dried out and cleaned, the less of the house has to be replaced.
Most of this work runs through a home insurance claim, so ask early how the company works with insurers. If an old flood was never properly dried, expect mould to be part of the same job.
Signs to look for
- Water stains, swollen baseboards or warped flooring
- A musty or smoky smell that never quite goes away
- A white, powdery crust on basement walls
Questions to ask before you hire
- Do you work with my insurer directly?
- Will I get moisture readings in writing before the walls are closed up?
- Do you rebuild afterwards, or only dry out and tear out?
- Is there a warranty on the rebuild?
Calgary companies that do this work
Canstar Restorations
Water, fire, storm and mould restoration; hazardous material removal · Calgary office (western Canada)
canstarrestorations.com ↗ (opens in a new tab)DKI Calgary
Water, fire, mould and asbestos work, hoarding clean-up, rebuild · Calgary, Airdrie, Chestermere, Cochrane
calgary.dki.ca ↗ (opens in a new tab)Nonstop Restoration
Flood, sewer backup, fire, mould and asbestos; pack-out and rebuild · Calgary and area
nonstoprestoration.ca ↗ (opens in a new tab)Pro-Claim Calgary
Flood, sewer backup, fire, mould, asbestos, hoarding and trauma clean-up · Calgary and area, plus Canmore
proclaimcalgary.ca ↗ (opens in a new tab)PURE Restoration
Water, fire, wind and mould repair; asbestos and biohazard removal · Calgary, Cochrane, Airdrie, Okotoks
purerestoration.ca ↗ (opens in a new tab)PuroClean Restoration of Calgary Central
Water, fire, smoke, mould and biohazard clean-up; reconstruction · Calgary, Chestermere, Cochrane, Strathmore
puroclean.ca ↗ (opens in a new tab)Rainbow Restoration of Calgary
Water, flood, fire and smoke, mould, board-up, reconstruction · Calgary, Airdrie, Chestermere, Cochrane, Okotoks
rainbowrestores.com ↗ (opens in a new tab)SERVPRO of Calgary Downtown, Skyview, South-Southeast
Water, sewage, fire, mould and storm clean-up; rebuilding · Calgary and nearby communities
servpro.com ↗ (opens in a new tab)Quote more than the house can carry? Selling it as it stands is the other way out.
Asbestos and vermiculite
Health Canada says asbestos was used in a variety of building materials in some homes built before 1990.
In a house it can turn up in drywall mud, plaster, ceiling and floor tiles, textured finishes and insulation, including some vermiculite attic insulation. Material in good condition and left alone is not considered a health risk. The danger is in disturbing it, which is why testing comes before any renovation.
Removal is regulated work in Alberta. Employers who remove asbestos must notify the province 72 hours ahead, and their workers need approved training.
Signs to look for
- A house built before 1990 where walls, ceilings or floors are about to be opened
- Loose, pebble-like insulation in the attic (vermiculite)
- Textured “popcorn” ceilings or old vinyl floor tiles
Questions to ask before you hire
- Can you test first, through an accredited lab?
- What is the written scope, and do you monitor the air?
- Do you file the notice with Alberta OHS?
- Can I have the disposal records?
Calgary companies that do this work
Alberta Fire & Flood
Asbestos assessment and abatement, mould remediation, disaster restoration · Calgary and area
abff.ca ↗ (opens in a new tab)Asbestos Solutions
Asbestos testing and abatement, demolition · Calgary, Airdrie, Cochrane, Okotoks
asbestos-solutions.ca ↗ (opens in a new tab)Calgary Asbestos Abatement
Asbestos testing, removal, disposal and post-abatement air testing · Calgary and southern Alberta
asbestos-yyc.com ↗ (opens in a new tab)Makki Abatement
Asbestos testing and removal, vermiculite and attic insulation, mould · Calgary, Airdrie, Cochrane, Okotoks, High River
makkiabatement.ca ↗ (opens in a new tab)ServiceMaster Restore of Calgary
Asbestos abatement and testing, mould removal · Calgary, Airdrie, Okotoks, Strathmore, Canmore
smcalgary.com ↗ (opens in a new tab)Sorell Insulation
Asbestos testing and removal, clearance testing, re-insulation · Calgary and area
sorell.ca ↗ (opens in a new tab)Urban Abatement
Asbestos and vermiculite removal, mould, water, fire and flood repair · Calgary and Edmonton
urbanabatement.ca ↗ (opens in a new tab)Quote more than the house can carry? Selling it as it stands is the other way out.
Knob-and-tube and aluminum wiring
Knob-and-tube was used in homes from the early 1900s to the 1940s. Aluminum branch wiring turns up in some houses built between the mid-1960s and the late 1970s.
Many insurers see knob-and-tube as a higher risk; some will not renew a policy until it is replaced. Aluminum wiring is safe when the connections are done properly with devices approved for aluminum, and some insurers want an electrician’s inspection to show that before they will write the house.
Signs to look for
- Porcelain knobs and tubes in the attic or along basement joists
- Two-prong outlets throughout the house
- Wiring marked AL or ALUMINUM at the panel
- Flickering lights, or outlets and switch plates that feel warm
Questions to ask before you hire
- Full rewire, or repair of the connections that matter?
- Is the panel big enough, or does it need replacing too?
- Who repairs the plaster or drywall after the wires are pulled?
- Are the permit and inspection included?
Calgary companies that do this work
Ampt Over Electric
Aluminum wiring remediation and full-home rewiring · Calgary, Okotoks, Cochrane
amptcalgaryelectricians.com ↗ (opens in a new tab)Clear Electrical Solutions
Aluminum wiring replacement or pigtailing; whole-home rewiring · Calgary, Airdrie, Cochrane, Okotoks, Chestermere
clear-electrical.ca ↗ (opens in a new tab)Emerald Electric
Knob-and-tube and aluminum wiring replacement in homes · Calgary and about 50 km around
emeraldelectricyyc.com ↗ (opens in a new tab)FuseSmart Electric
Knob-and-tube replacement, aluminum wiring remediation, renovation wiring · Calgary, Airdrie, Cochrane, Okotoks, High River
fusesmartelectric.ca ↗ (opens in a new tab)Panel Upgrade Experts
Knob-and-tube replacement, aluminum wiring, panel upgrades · Calgary, Chestermere, Cochrane, Okotoks
panelupgradeexperts.com ↗ (opens in a new tab)Sun Electrical
Home rewiring, aluminum wiring repair, knob-and-tube replacement · Calgary, Airdrie, Okotoks, Cochrane
sunsolarelectrical.ca ↗ (opens in a new tab)The Honest Electrician
Aluminum wiring inspection and remediation; rewiring where needed · Calgary and area
honestelectrician.ca ↗ (opens in a new tab)Voltra Electrical Services
Whole-home rewiring, knob-and-tube removal, aluminum remediation, panels · Calgary, Airdrie, Cochrane, Okotoks, Canmore
voltracalgary.com ↗ (opens in a new tab)Quote more than the house can carry? Selling it as it stands is the other way out.
Roofs and hail damage
Calgary is hail country. The 2024 storm was the costliest hailstorm in Canadian history, with nearly 60,000 homes damaged.
Insurers look at a roof’s age and condition, so an old roof or unrepaired hail damage tends to come up at renewal, and again in the inspection when you sell.
Signs to look for
- Missing granules: dark patches, or grit in the eavestroughs
- Dented vents, flashing or eavestroughs after a storm
- Curling or cracked shingles
- Stains on a ceiling or in the attic after rain
Questions to ask before you hire
- Repair or full replacement, and why?
- Will you help with the insurance claim and meet the adjuster?
- What warranty covers the workmanship, not just the shingles?
- Who clears the nails and debris afterwards?
Calgary companies that do this work
A. Clark Roofing & Siding
Roof replacement and repair, cedar shake, siding, insurance claims · Calgary and Edmonton
aclark.ca ↗ (opens in a new tab)Big Boy Roofing
Roof replacement and repair, flat roofs, eavestroughs, hail claims · Calgary, Airdrie, Cochrane, Okotoks, High River
bigboyroofing.ca ↗ (opens in a new tab)Bricor Roofing
Shingle roofs, storm-damage inspections, attic ventilation · Calgary and area
bricorroofing.com ↗ (opens in a new tab)Chinook Exteriors
Roof replacement and repair, siding, eavestroughs, hail inspections · Calgary, Airdrie, Cochrane, Chestermere, Okotoks
chinookexteriors.ca ↗ (opens in a new tab)Kymand Roofing
Roof replacement and repair, hail and insurance claims, siding · Calgary, Edmonton, Lethbridge
kymandroofing.com ↗ (opens in a new tab)Niko Roofing
Asphalt, cedar, metal and flat roofing; flashing and skylights · Calgary
nikoroofing.com ↗ (opens in a new tab)Prairie Home Roofing
Asphalt, metal and flat roofing, siding, eavestroughs, inspections · Calgary, Strathmore, Airdrie, Okotoks
prairiehomeroofing.com ↗ (opens in a new tab)Sunwest Roofing
Roof replacement and repair, hail restoration, insurance claims · Calgary
sunwestroofing.ca ↗ (opens in a new tab)Quote more than the house can carry? Selling it as it stands is the other way out.
Clean-outs and a house full of belongings
An estate that still holds forty years of belongings, a hoarded house, a garage nobody has opened in years.
Clean-out companies sort, haul, donate and dispose. Before the truck is loaded, ask them to set aside papers, photos and anything the family has flagged.
When it helps
- Before a sale, a move into care, or handing back the keys
- When the family lives far away
- When there is more than a few weekends can clear
Questions to ask before you hire
- Fixed price, or by truckload?
- What gets donated, what gets recycled, what goes to the landfill?
- Will you hold back documents, photos and valuables for the family?
- Do you take paint, propane tanks and other hazardous items?
Calgary companies that do this work
1-800-GOT-JUNK? Calgary
Full-service junk removal, furniture donation and recycling · Calgary and area
1800gotjunk.com ↗ (opens in a new tab)All In Junk
Junk removal; estate, hoarder and garage clean-outs; interior demolition · Calgary and area
allinjunk.ca ↗ (opens in a new tab)Calgary Junk Removal
Residential junk removal, estate clean-outs, donation and recycling · Calgary, Airdrie, Chestermere, Cochrane, Okotoks
calgaryjunkremoval.com ↗ (opens in a new tab)Clearout Crew
Estate, property and hoarding clean-outs; general junk removal · Calgary, Airdrie, Cochrane, Okotoks
clearoutcrew.ca ↗ (opens in a new tab)Junk Junkies
Home and garage clean-outs; shed and hot tub removal; yard debris · Calgary, Okotoks, Airdrie, Chestermere
junkjunkies.ca ↗ (opens in a new tab)Junk PROS Calgary
Residential and construction junk removal; garage clean-outs · Calgary, Airdrie, Okotoks, Chestermere
junkproscalgary.ca ↗ (opens in a new tab)T&C Hauling Services
Junk removal; estate, property and storage-unit clean-outs · Calgary, Airdrie, Cochrane, Chestermere, Okotoks
tchaulingservices.com ↗ (opens in a new tab)Quote more than the house can carry? Selling it as it stands is the other way out.
How companies get on this list
- Every company is listed from the information on its own website, checked on 26 October 2026.
- A listing is not a recommendation. We have not hired every company on this page, and nobody pays to be on it.
- Companies are in alphabetical order, not ranked.
- Some listed companies may also send homeowners our way through our public referral program, on the same terms as anyone else.
- Is this your company? Email info@sellhomeasis.ca to correct your listing or take it down.
A plain-language summary of public information from Health Canada, Alberta Health Services and the Government of Alberta, and of what we see in Calgary houses. It is not professional advice: get your own inspection and quotes. Insurer practices and costs change.
When the repairs cost more than the house can carry
Sometimes the honest answer is that a house needs more than it is worth putting in.
We buy older Calgary houses exactly as they stand: poly-B, a moving foundation, old wiring, flood history, a house still full of belongings. One visit, an offer in writing within 24 hours, and you pick the closing date. If repairing it and listing it would leave you with more money, we will tell you that instead.
Contractors: when a customer’s quote is more than their house can carry, our referral page explains how to send them our way.