Affordable Roofing Company in Edmonton: Can You Install New Roofing Material Over Roof Shingles
Thinking of installing a new roof over existing shingles in Edmonton? Learn what to consider before you begin. Brown’s Roofing in Edmonton answers.
If your roof is nearing the end of its life, Brown’s Roofing in Edmonton says you may be wondering whether you can save money by installing new shingles over the old ones instead of tearing everything off. It’s a common question, especially among Edmonton homeowners looking to reduce upfront roofing costs and roofing materials in Edmonton.
The short answer is: sometimes it’s allowed, but it’s rarely the best choice. Whether roofing over an existing roof makes sense depends on your home, Alberta building codes, and the condition of what’s underneath your shingles.
Here’s what you need to know before making a decision.
What Does “Roofing Over” an Existing Roof Mean?
Roofing over—also called a roof overlay—means installing a new layer of asphalt shingles directly on top of the existing shingles without removing the old roofing material.
This approach skips the tear-off process, which can reduce labour time and disposal costs. While it may sound appealing, it also means the roof deck, underlayment, and flashing are not fully exposed or inspected during installation.
In Edmonton’s climate, that detail matters more than many homeowners realize.
The Pros of Putting a New Roof Over an Old One
There are a few situations where roofing over an existing roof can make sense. Your roofing experts will help you decide when reroofing is a good option, but here are some considerations:
Lower upfront cost
Because there is no tear-off, labour and landfill fees are reduced, making the initial price lower.
Faster installation
With fewer steps involved, the project can often be completed more quickly.
Less mess when installing roofing systems
Skipping the tear-off means fewer nails, debris, and dust around your property.
These advantages are usually short-term. The long-term performance of the roof is where most problems begin.
The Cons (And Why A Roofing Company Might Advise Against It)
While roofing over may save money upfront, it comes with serious trade-offs—especially for Edmonton homes, even if aesthetics are not affected.
Hidden damage stays hidden
If there is rot, moisture damage, or soft decking beneath the old shingles, it cannot be properly identified or repaired without a full tear-off.
Added weight on your roof structure
A second layer of shingles adds significant weight, which increases stress on the roof framing—particularly risky during heavy snow loads.
Reduced roof lifespan
Overlay roofs typically wear out faster than properly installed full replacements.
Poor heat and moisture performance
Trapped heat and moisture between layers can lead to premature shingle failure and ventilation issues.
Warranty limitations
Many shingle manufacturers either reduce or void warranties when shingles are installed over existing layers.
For these reasons, most experienced roofing contractors recommend full removal in the majority of cases. If you still have questions, the expert roof installers at Brown’s Roofing in Edmonton will answer those questions for you.
Alberta Building Code Rules and Edmonton Climate Considerations
In Alberta, building code generally allows a maximum of two layers of asphalt shingles. If your home already has two layers, a roof overlay is not permitted.
Even when a second layer is technically allowed, Edmonton’s climate makes overlays far riskier than in milder regions.
- Heavy snow accumulation increases structural load
- Freeze-thaw cycles accelerate shingle deterioration
- Ice dams are more likely when ventilation issues exist
- Moisture problems are harder to detect without removal
- What may seem like a cost-saving shortcut can turn into a much more expensive repair later.
When a Full Roof Replacement Is the Smarter Investment
A complete tear-off and replacement with new roof products is usually the best option if:
- Your roof has soft spots or sagging areas
- There are signs of water damage or leaks
- The existing shingles are curling, brittle, or uneven
- You want full warranty coverage
- You plan to sell your home and want maximum resale value
A full replacement roofing option allows proper inspection, new underlayment, upgraded ventilation, and correct flashing installation—all critical for long-term roof performance in the Edmonton area. If you want peace of mind that your roof will protect your home, ask the experts at Brown’s Roofing what option is best for you.
Roofing in Edmonton Frequently Asked Questions
Is it ever okay to put a new roof over an old one?
In limited cases, yes—but only if the existing roof is in excellent condition, has a single layer, and meets code requirements. Even then, it is not usually the best long-term Edmonton roofing solution.
How many layers of shingles are allowed in Alberta?
Most homes are limited to two layers. If your roof already has two, a tear-off is required.
Does roofing over an old roof reduce lifespan?
Yes, it affects durability. Overlay roofs typically fail sooner than full replacements due to trapped heat, moisture, and uneven surfaces.
Will a roof overlay save money long term?
Often no. While the upfront cost may be lower, shorter lifespan and higher repair risks usually make it more expensive over time.
Does installing shingles over old shingles affect insurance or resale?
It can. Some insurers and buyers view overlay roofs as a red flag, especially if documentation and warranties are limited, even if curb appeal is not affected.
The Bottom Line for Homeowners in the Edmonton and the Surrounding Areas
While it may be tempting to install a new roof over an old one, it’s rarely the best decision for long-term protection, performance, roofing materials in Edmonton, or value—especially in Edmonton’s demanding climate.
At Brown’s Roofing, the focus is always on a professional installation, so we do the job properly, not cutting corners. A professional roof inspection is the best way to determine whether a roof overlay is even an option—and whether it truly makes sense for your home. We even have a workmanship guarantee.
If you’re considering a roof replacement or need a new roof in Edmonton, contact Brown’s Roofing in Edmonton for an honest assessment and expert recommendation tailored to your property.