Report by David Ova
Retired Building Inspector: City of Toronto
Exclusively for Green Metal Roofing and Manufacturing Inc.
Does your house need a new roof? Chances are that if it has not
been done in the last 12 to 15 years then it is probably due to be
replaced in the very near future. Nowadays, we all want to stretch
our hard earned dollars and we need to be smart about how we
spend our money.
The majority of us who need a new roof just automatically call
roofing companies that install asphalt shingles. The process is
simple; we get 3 quotes then pick one based on price (experience,
There is another smarter option which in the long run would help us
save even more money and guarantee the best return on investment.
A state of the art metal roof from Green Metal Roofing &
Green Metal Roofing & Manufacturing Inc. provides high-performance
Organic Coated Steel from the world’s leading steel producer,
Now, you are going to say that I am crazy, metal roofing is way too
expensive and is only for rich people that live in mansions. Twenty
years ago you would have been right but not anymore. I will show
Let’s do some calculations to see if it really makes a financial sense
to go with a metal roof.
In the following calculations I will use a typical two storey 2200 sq.
ft. subdivision house with a typical hip roof and a 6/12 pitch. It will
have a roof area of 1700 sq. ft. (including waste material and a roof
pitch calculations). I would like to point out that one of the main
benefits of a metal roof is the energy efficiency because it reflects
the heat from the sun. This would cut your cooling costs anywhere
from 20% to 40%. I will use a saving of 30% in my calculations and
also not include hst or inflation.
Let’s start with asphalt shingles. The typical cost to install asphalt
shingles is $3.00/ sq. ft. which means it will cost $5100 including
installation (3 x 1700). Despite manufacturers claims that it will last
anywhere from 25 to 30 years, you will likely have to replace it after
15 years. Asphalt shingles just do not last that long.
There is no such thing as a 20 year, 35 year or 50 year shingle.
Those marketing phrases refer to the warranty period, not to life
expectancy of the shingles.
Here is what I see in a shingle Limited Warranty term: The shingle
manufacturer will pay to repair, replace, or clean (at their option), any
shingle that is defective under the terms of the Limited Warranty and only manufacturing defects in the shingles, that cause leaks, are
covered by the Limited Warranty.
Now, let’s look at a metal roof. A good quality metal roof will cost an
average of $6.00/ sq. ft. Our example house will therefore cost
$10200 including installation. Installation for a metal roof takes up to
3 times longer and requires a greater amount of skill to complete.
Now, I will show you why metal roofs make more financial sense.
I went to the Hydro One Networks website and then to the appliance
calculator and got my numbers based on a 2.5 ton air conditioner to
run for 12.6 hours a day for six months a year. The monthly bill for
cooling this house came in at $200 per month (30% of that is $60
which translates to $ 360 per year in savings).
Now, we are at year 15. The shingle roof is now ready to be changed
again. That means another $5100. Total money spent so far is
$10200. On the other hand the Metal Roof at year 15 does not have
to spend anything. For the last 15 years this roof has saved $5,400
Now, let’s move to year 30. The shingle roof has to get another roof
replaced because the second roof is now at the end of its lifespan.
Add another $5100 for a total of $15300 spent. I also did not include
the cost of having the shingles removed and dumped in a landfill,
At 30 years the metal roof’s original investment of $10200 has been
recouped and also has $600 in their pocket.
Did I mention also that there is still 25 years left on the original 55
year transferrable warranty at year 30.
-$5400 (360 x 15)
-$5400 (360 x 15)
After 30 years the shingle roof has spent $15300 plus removal and
dumping fees twice and the metal roof has recovered the entire
investment and has $600 in their pocket. Now, you tell me who
made the wiser choice?