How much does it cost to nano coat a shingle roof in Ottawa?
Nobody can answer that accurately without seeing your roof. A firm number over the phone is a guess, which is why we do not post a price list. Below is what moves the number, so you can tell whether an estimate came from your roof or from an average.
Two houses on the same street, with the same floor plan, routinely price differently. One has a steeper pitch and two dormers. One has a mature maple dropping debris into the valleys for fifteen years. One is three years old and qualifies for the newer-roof product, the other is fourteen and does not.
What determines the price of a roof coating?
Seven factors: measured roof area, pitch and walkability, storey count and access, shingle condition, the product tier the roof qualifies for, the prep and minor repairs required, and when in the season you book it.
Measured roof area, not the square footage of the house
We price on the area of the roof surface, not the floor area of the house. A bungalow has much more roof per square foot of living space than a two storey home with the same floor plan, and a steep pitch adds more again.
Trades usually count in squares of 100 square feet. A cut-up roof with hips, valleys and dormers takes longer per square than a simple gable.
Pitch, storeys and how safely the roof can be walked
We walk a low-slope bungalow and work it directly. A steep roof needs anchors, harnesses and a slower pace. A three storey elevation, or a walkout that turns a two storey front into a three storey rear, changes the ladder and staging setup before anyone touches a shingle.
The condition and age of the shingles
Condition decides whether the roof qualifies at all, and how much prep it needs. We look at granule loss, curling and lifting edges, brittleness, the valleys and eaves, and growth on the shaded slopes.
In Ottawa the north-facing slope is usually the worst, because it dries slowest after every freeze-thaw swing and after spring melt. A roof that needs a serious clean and a list of small repairs carries that work in the number.
Which product tier the roof qualifies for
The roof decides the product, not the budget. We apply three GoNano coatings to asphalt shingles, matched to the age and condition of the roof:
- GoNano NuRoof Fortify for sound roofs under 5 years old. It penetrates and reinforces the shingle rather than sitting on top, without altering the roof's appearance.
- GoNano NuRoof Revive for weathered roofs 6 to 20 years old. It penetrates deep into the shingle to rebuild flexibility and reinforce structure.
- GoNano NuRoof Boost for older roofs, generally 15 years or older, that no longer score high enough for NuRoof Fortify or NuRoof Revive.
The Roof Health Score GoNano assigns your roof at the assessment decides suitability. An older roof cannot buy the newer-roof product's result by paying more.
We quote life extension as "up to", because the roof in front of us decides the result: up to 20 years for NuRoof Fortify, up to 12 years for NuRoof Revive, and up to 10 years for NuRoof Boost on a full treatment. GoNano's warranty is a separate, shorter term, covered in the quote checklist below. The shingle rejuvenation page for NuRoof Revive covers the middle tier in detail.
Access, obstructions and setup
Everything we work around adds time. Solar panels, skylights, satellite dishes and complex vent stacks mean cutting in by hand. Tree cover over a slope means clearing first.
On the ground, a narrow lot line, a deck or a garden bed against the wall changes where we can foot a ladder and what we protect below. Parking and staging matter too, particularly on older Ottawa streets with no driveway width to spare.
Prep, cleaning and minor repairs
Prep is part of the job, not an upsell. If the roof qualifies, we handle the necessary minor repairs and thoroughly clean the surface so it is ready for treatment.
How much a roof needs varies enormously: debris packed into the valleys, moss on the shaded slope, a handful of lifted or missing tabs after a windy spring. A roof carrying all three prices above a roof carrying none.
Season and booking window
Coatings of this type go onto a dry surface in above-freezing conditions, which in Ottawa limits the working year to spring through fall. The busiest period is right after spring melt, when winter damage has just become visible and everyone books at once.
Late-season work competes for fewer dry days, so a roof booked in October is at the mercy of the weather in a way a roof booked in June is not. Booking early buys you a reliable date, not a lower price. We'll confirm the right application window for your roof at the assessment.
How does the free on‑site assessment work, and what do I get from it?
A visit is the only way to judge the factors above, so the estimate follows the inspection, not the other way around. We inspect the roof, verify its condition and document it with photos. If it qualifies, we do the prep and minor repairs, then apply the treatment, usually in a single day. It soaks into the shingle rather than sitting on top as a film.
After the visit you have dated photos of your own roof, a plain answer on whether it qualifies, which product suits it if it does, and a clear upfront estimate. That is useful even if you do nothing this year. Book the free on-site assessment.
What is included in the estimate, and what is extra?
The estimate covers the assessment, the prep and cleaning, the necessary minor repairs we identify, and the coating on the areas listed in the scope.
Work that is not a coating job sits outside it: replacing decking, structural repairs, eavestrough or fascia work, attic insulation and ventilation, and anything that only shows up once we clean the roof. A good estimate says in writing what happens if extra findings turn up, and what they cost, before anyone acts on them. Ask for that clause specifically.
Is a nano coating cheaper than replacing the roof?
The two rest on different cost structures, so the quotes are hard to compare line by line.
A replacement quote is mostly labour: tear-off, disposal and landfill costs, and new material. It brings a bin on your driveway, multiple days of disruption, and a real chance of change orders, because nobody sees damaged decking until the old shingles are off.
A coating quote is mostly prep and application labour plus the coating. There is no tear-off, bin or disposal, and you know the scope before work begins because we inspected the roof first.
A coating adds years to a serviceable roof. It moves the replacement further out, it does not cancel it. So compare cost per year of life added, not cost per job, against how long you plan to stay in the house. Our guide to coating versus replacement works through that decision case by case.
Does every roof qualify for a coating?
No. Our process is conditional on the roof qualifying at the assessment. Roofs that do not qualify usually show one or more of these:
- Active leaks, or staining on the ceiling or in the attic.
- Soft, delaminated or rotted roof decking underfoot.
- Visible sag along a ridge or between rafters, which is a structural problem, not a surface one.
- Widespread missing or blown shingles rather than a handful.
- Shingles so brittle that they crack rather than flex when lifted.
- A roof already at the end of its service life, where the mat is showing across whole slopes.
Coating a failed roof does not buy years. It buys a short delay before the same replacement. If you are not sure which category your roof is in, the guide to curling shingles and granule loss walks through the symptoms from the ground.
What makes a roof coating quote trustworthy?
Use this checklist on any written quote you receive, including ours.
- It follows someone actually looking at the roof. We measure the area from satellite imagery, but condition, repairs and access only show up in person, so a price should not be fixed before that visit.
- It comes with dated photos of your roof. Without them you cannot check the recommendation against the evidence.
- It names the specific product. "A roof coating" is not a product. The tier changes the expected years added, so it belongs in writing.
- It states the measured area it is priced on. That is the one number you can check yourself, and it is what makes two quotes comparable.
- It separates prep and minor repairs from application. You want to know in advance what happens, and what it costs, if extra repairs surface once the crew is on the roof.
- It says who issues the warranty. On coatings the warranty generally comes from the manufacturer rather than the applicator. GoNano issues a manufacturer's warranty of 3 to 20 years. The term depends on the Roof Health Score GoNano assigns your roof at the assessment and on the number of coats applied. Ask for the warranty document and read what voids it before you sign anything, from anyone.
- It is honest about limits. A quote that promises a coating will fix a leaking or failing roof is describing something the product does not do.
- It carries no pressure. Be wary of an expiring today-only price, a refusal to put scope in writing, or a deposit requested before anyone has looked at the roof.
When paying for a roof coating is not worth it
A coating is worth paying for when the roof is sound and you want more years out of it. It is not worth it when the roof has already failed, which the signs under "Does every roof qualify for a coating?" cover, or in the two cases below.
The roof is coming off anyway. If you are adding a dormer, an addition or a solar array in the next year or two, or the roof is already at replacement age, the coating has no time to earn back its cost.
The real problem is inside the attic. Ice dams form at the eaves when heat escaping into the attic melts snow up the slope and it refreezes over the cold overhang. The treatment improves drainage by enhancing the hydrophobic properties of the shingles, which protects the roof from water and ice damage, but it changes nothing about attic insulation, air sealing or ventilation, which is what drives the dam. If your eaves ice up heavily every winter and you get water inside, fix the attic first.
PROTEXA is an Ottawa applicator of the GoNano line of protective nano coatings, serving Ottawa, Kanata, Nepean, Barrhaven, Orleans, Gloucester and Stittsville. We assess the roof, handle the prep and apply the coating on site. To find out what your own roof would take, book the free on‑site assessment.