Asphalt Roofing Guide

Here is a guide to help our customers understand the type of roof they are deciding to install. We know when in the market for a new roof, estimates can get a little confusing or have an extreme range in price. VI Roofing wanted to make it as simple as possible for you as a buyer to understand some of those cost while keeping the information as condensed as possible. Generally there are 3 levels of roofs companies  are offering here in Victoria and the G.V.A. We describe them as; economical, Standard, and Life Time Plus. To complement each level of roofs we also, break down a few common upgrades to increase life expectancy before repairs.   We offer all three to be cater to our diverse client base.




Description: This is the most cost effective roof. Recommend have a solid decking like osb/plywood (pros/cons below), pair with shingles like Owens Corning Oak Ridge (40 year), and more. quoted with an electric galvanized nail (10+ year see details on the nails below), synthetic underlay as a base.  


Pros: This can be a good option for the price

Cons: limited workmanship warranty; 10 - 20 year, 


Description: This is VI Roofings go to roof for price, durance, and life expectancy. Must have solid decking like OSB/Plywood, pair with a Owens Corning Sure Nail (40 year/High wind shingle) quoted with an Hot Dipped galvanized nail (50+ year)SBS peel and stick for eves and valleys, synthetic underlay. 1" by 6" diverters on gable ends


Pros/ Full workmanship warranty with manufacturer ++  warranty 

         best price for dollar to life span 

         20-25  year


Life Time Plus:

This is a high end roof made to push the life expectancy of asphalt roofing systems. and comes with a full replacement warranty. Must have a plywood decking, pair with a Legacy Shingle (50 year), peel and stick eves, valleys, all penetrations (vents, skylights), wall transitions. gold/titanium underlay, Hot Dipped nails (50+), led flashing for plumbing,hard plastic vents rated/metal (rated 50 year), 28g flashing, only upgrades available are perimeter flashing and stainless steel nails   25-35 years  1" by 6" diverters on gable ends



Pros best warranty we offer, highest end materials, go-to for strata and business (keep businesses open and reduce the loss of mobility during long term construction projects.   


Cons can't think of any



Common Upgrades: 



OSB’s Pluses

OSB has more going for it than just cost. Resource-efficient builders appreciate that it can be made from small, fast growing trees, many of which come from tree farms rather than forests. It can also be bought in 9 foot sheets, which means you can sheathe a wall from the top plate to the bottom of the floor joists with single, vertical sheets, leaving no horizontal seams. OSB panels can be manufactured in lengths up to 16 feet (or sometimes even higher), while plywood is generally limited to 8 to 10 feet.

OSB boasts a more consistent density. While a sheet of plywood might be 5 to 7 plies thick, a sheet of OSB is made from as many as 50 strand layers packed and compressed into the same thickness. There’s no equivalent of the weak spots that can be left in plywood when knotholes in adjacent plies overlap.

On the downside, the material is a bit heavier than plywood—two pounds or more per sheet depending on its thickness and intended use—but this difference has no effect on the panels’ performance. It just takes a bit more muscle to handle on the jobsite.


Plywood’s Superior Wet Performance

The biggest difference between the two panels is how they react when exposed to large amounts of moisture over extended time periods. With the exception of projects in very arid regions like the Southwest, sheathing and flooring panels are routinely covered with rain, snow, and ice during construction delays. It’s here that plywood has the edge.

When plywood gets wet, it tends to swell consistently across the sheet, and then returns to its to normal dimensions as it dries out. It dries out relatively quickly, and the swelling is usually not enough to affect floor or roof finishes.

OSB takes longer to get wet than plywood but also takes longer to dry out. When used as a roof sheathing, this tendency to hold moisture means it can degrade faster than plywood when exposed to chronic leaks.

When OSB does get wet it also tends to swell along the edges, and those edges stay swollen even after the material has dried out. Swollen edges have been known to telegraph visible ridges called “ghost lines” through asphalt roof shingles.

Manufacturers insist that OSB’s moisture problems have been corrected, thanks to the development of water-resistant edge seals. But of course that edge seal is lost when panels get cut on site, as they often do.


Hot Dipped Galvanized nails are the highest quality of galvanization available, offering 1.7 mils minimum zinc coating thickness, evenly covering all nail surfaces from head to tip - and offering a 30-50+ year lifespan. The process for hot-dip galvanizing includes cleaning the steel body, submerging the nail into molten zinc, and spinning it to remove excess coating. Perfect for use indoor and outdoor, HDG nails provide a good balance of cost and quality. And, an added benefit, the coarse zinc particles offer added "cling" to whatever surface they come in contact with - providing additional holding strength.

For applications where lower quality galvanization is suitable, Electro-Galvanized nails are among the thinnest coating, at 0.36 mils maximum. Ideal for indoor applications, the EG coating has an average lifespan of 5-10+ years depending on the environment. Similar to HDG, Electro-Galvanized nails are also bathed in zinc, but with an electric current that charges the zinc acid and attaches it to the nail's body. (will install on a buget roof if you understand the risks)

Despite the benefits to using a galvanized nail, there are certain types of wood, such as cedar or redwood, where galvanized nails (especially those with a lower quality galvanization) will quickly rust and streak the surface, due to a chemical reaction with the wood. We typically recommend using stainless steel nails if working with these types of wood, for a guaranteed high-quality finish.

Perimeter/Drip Edge Flashing:

Drip edges not only act to preserve the appearance of your roof, but they help shield your property from potential damages:

  • Deters insects and other small pests from accessing the space between the fascia board and a deck at the bottom of the roof, which could otherwise give pests the opportunity to enter a home or attic.

  • Protects the shingles from potential water damage, which otherwise may cause the roof, deck, and fascia board to erode over time.

  • Pushes water away from the fascia and reduces the risk of it eroding over time.

  • Helps the gutters to move water away from the house and its base.

  • Shields exposed regions from insect and pest infestation.

  • Safeguards the edge of a deck from water during rainstorms.

  • Guards the underlying roofline against damage in the winter months such as ice and snow damage, which could result in rotting.

  • Safeguards the roof from strong gusts of wind and wind-blown rain.

  • Shields the fundamental wood and promotes the performance of water-shedding.

  • Shields against the occurrence of shifts between a deck and the fascia boards.

  • Lengthens the life and the effectiveness of the roofing materials and the roof overall.

High Profile Cap (HD Cap): 

Two reasons for high profile cap

Asthetics – The primary reason homeowners choose to install High Profile Ridge Cap during their Calgary roof replacement is to add more defined look to the home.  The product is almost an inch thick and gives the roof a more “sawtooth” profile when see from the ground.  This is especially desirable  on houses where much of the roof is visible.

Hail Damage Protection – When we are performing an inspection on a home after a hail storm the first place we look for damage to the roof is on the hips and ridges.  Commonly these will have cavities in the sheeting beneath the shingles, and hail can easily punch through the product.  High Profile Ridge Cap is a constructed from several layers of rugged materials, almost an inch thick and infused with rubberised asphalt(SBS).  This gives the product the ability to shrug off hail impacts that would otherwise punch holes in the regular product, and serves to ensure it will last as long as the rest of your roof

Last 3 types of warrenties

Limited workmanship (attempted to repair only)

Full workman ship with manufacture warranty (attempted to repair/ or cover the cost of all labor to replace the entire roof) manufacturer offers full replacement as we have followed all their guidelines of install

Full warranty, will replace the same cost of the job with vi and a manufacture warranty 

all warranties are automatically transferred 





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VI Roofing
3503 Richmond Rd
Victoria, BC V8P 4P7

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