Signs it’s time to replace your roof
It’s time to replace your roof when damage is widespread, the shingles have reached the end of their life, or water keeps finding new ways in. One missing shingle is a repair. A roof failing everywhere at once is a replacement, and patching it only buys time.
In Calgary, asphalt shingles typically last about 15 to 20 years, worn down by strong sun, hail, wind and constant freeze-thaw cycles. Watch for:
- Age past 15 to 20 years. Plan the replacement before a storm forces the timing.
- Granule loss and bald patches. Granules piling up along the drip line, or dark smooth patches on the roof, mean the shingles are wearing through.
- Curling, clawing or cupping. Lifting edges or bowed centres point to dried-out shingles and often poor attic ventilation.
- Cracked or brittle shingles. Shingles that snap instead of flex will not survive the next windstorm.
- Repeated leaks in different spots. When one leak is fixed and another appears, the system as a whole is failing.
- Widespread hail bruising. Soft, dark dents across many slopes weaken the shingle mat.
- Sagging roof lines or a soft deck. A dip along the ridge suggests water-damaged sheathing.
- Daylight or damp insulation in the attic. Water and air are getting through.
- A previous layover. Shingles installed over an older layer hide problems and should be torn off completely.
Repair or replace?
Repair when damage is limited to a small area on a roof with plenty of life left; replace when damage is widespread, the roof is near the end of its life, or leaks keep coming back.
| Situation | Usually repair | Usually replace |
|---|---|---|
| Roof age | Well under 15 years | Around or past 15 to 20 years |
| Shingle damage | A few missing or lifted shingles | Curling, cracking or granule loss across many slopes |
| Leaks | One leak with a clear source, such as flashing | Repeated leaks in different spots |
| Hail | Isolated bruising on one slope | Bruising across most of the roof |
| Deck | Solid underfoot | Soft, sagging or rotten in several areas |
| Previous work | Original single layer | An existing layover or many past patches |
| Plans | Selling soon with a sound roof | Staying put and tired of repairs |
When a roof sits in between, we explain both options plainly, including what a repair will and will not fix.
What a complete roof replacement includes
A complete roof replacement removes everything down to the wood deck and rebuilds the whole roof system, not just the shingles you see from the street. Here is what belongs on your quote, and why it matters in Calgary:
- Full tear-off to the deck and disposal. The only way to see and fix what is underneath.
- Deck check and sheathing replacement. Solid boards keep fasteners holding through wind and snow load.
- Ice-and-water shield at the eaves and valleys. Freeze-thaw and chinook melts cause ice damming at the roof edge; this membrane stops backed-up water.
- Synthetic underlayment. A secondary water barrier that stays put in wind and handles temperature swings.
- Drip edge. Directs water off the roof edge and keeps the deck edge dry.
- New flashing at walls, chimneys, skylights and plumbing vents. Reused, tired flashing is where many new roofs leak first.
- Shingles fastened to the manufacturer’s pattern. Correct nail placement keeps shingles on in strong west winds.
- Ridge venting balanced with intake. Air enters through intake vents at the eaves and exits at the ridge, keeping the attic cold and dry in winter.
- Cleanup and magnetic nail sweep. Yard, driveway and landscaping swept for stray nails.
When comparing quotes, check that each item is listed. A lower number often means something is missing.
Our roof replacement process, step by step
Our roof replacement process moves from an honest assessment to a clean yard, with no surprises along the way:
- Free inspection and recommendation. We tell you whether your roof needs a repair or a replacement, and why.
- Measured in squares, with a written itemized quote. One square is 100 sq ft, and roof area is usually about 1.3 to 1.5 times your home’s floor area because of pitch and overhangs. Every part of the work is listed.
- Scheduling around the weather. A full replacement needs about 3 to 5 dry days, so we pick the window from the forecast.
- Prep and protecting your property. We set up disposal and cover landscaping, walkways, siding and decks near the work area.
- Tear-off and deck repairs. Old roofing comes off to the bare deck. Damaged sheathing is shown to you, then replaced.
- Underlayment, ice-and-water shield and flashing. Membrane at the eaves, valleys and penetrations, synthetic underlayment across the deck, drip edge, and new flashing throughout.
- Shingles or metal, and ridge venting. Roofing installed to the manufacturer’s specifications, finished with ridge ventilation balanced to the intake.
- Cleanup, magnetic sweep and final walkthrough. We clear debris, sweep the property and walk you through the finished roof.
Choosing a roofing material for a Calgary home
The right roofing material for a Calgary home balances hail risk, how long you plan to stay and your budget. Most replacements come down to four choices.
Architectural asphalt shingles
The everyday default: thicker and more dimensional than old three-tab shingles, with the lowest up-front cost and about 15 to 20 years of life in Calgary.
Class 4 impact-resistant shingles
Class 4 is the top UL 2218 rating, tested with steel balls up to 2 inches in diameter. In Canada’s most active hail belt, it is the sensible default for a replacement, with the look of a standard shingle.
Metal roofing
The long-game roof. Metal costs more to start, lasts decades, sheds snow and does not lose granules. Large hail can dent panels, usually cosmetically.
Flat and low-slope membranes
Garages, additions and modern builds often have sections too shallow for shingles. These need a membrane system detailed to drain so water does not pond.
Timing a replacement in Calgary’s weather
The best time to replace a roof in Calgary is late summer into early fall, though work is possible in most seasons when the weather window is right.
Insurance-funded roof replacements
Hail and wind damage may be covered by home insurance, but how much your insurer pays usually depends on your roof’s age. Policies vary, so treat this as general guidance.
| Roof age | Typical insurer approach |
|---|---|
| Under 15 years | The insurer may pay for a full replacement, minus your deductible |
| 15 to 25 years | The payout is typically depreciated by 50 to 80 percent |
| Over 25 years | The insurer may pay actual cash value only, or deny the claim |
Your deductible comes off any payout, so minor damage may not be worth a claim. After a storm, document damage right away: photos of the roof from the ground, bruised or missing shingles, dented vents, interior stains and the storm date. Report it to your insurer promptly.
We help you understand how the process generally works, what roof-age depreciation means for you, and what a complete replacement should include. Coverage decisions are always made by your insurer.
What affects the cost of a new roof
The cost of a new roof depends mainly on its size, pitch, complexity and material, which is why we measure before quoting. The main factors are:
- Roof size in squares. More area means more material and labour.
- Pitch. Steeper roofs need more safety setup.
- Complexity. Valleys, dormers, skylights and chimneys add cutting and flashing.
- Layers to remove. A previous layover means more tear-off and disposal.
- Deck condition. Rotten sheathing must be replaced.
- Material. Architectural asphalt, Class 4 and metal each sit in different ranges.
- Ventilation and access. Adding proper venting, and how easily crews and bins reach the roof.
For a detailed breakdown of each factor, read our roof replacement cost guide for Calgary.
How to prepare for replacement day
Preparing for a roof replacement mostly means clearing space around the house and planning for noise and dust:
- Move vehicles out of the driveway for the disposal bin and deliveries.
- Clear the yard edge of patio furniture, planters, barbecues and toys.
- Protect items in the attic. Tear-off shakes loose dust and small debris.
- Keep pets and kids indoors while debris and nails are coming down.
- Tell your neighbours about the bin, trucks and noise.
- Expect noise. Tear-off is the loudest part, followed by nail guns. If you work from home, plan a quieter spot.
Replacement services
Roof replacement is one part of our replacement work in Calgary. If you are adding a roof rather than replacing one, see roof installation. Building a new home, garage or addition? Our new roof page covers new construction. For offices, retail and multi-unit buildings, see commercial roofing.
Ready to see where your roof stands? Request your free roof inspection or contact us.