Asphalt or metal: an honest cost comparison

The sticker price answers the wrong question

Metal costs roughly two to three times what an architectural asphalt roof costs on the same house. That number is where most conversations start and, unfortunately, where most of them end.

The useful question is not what the roof costs on the day it goes on. It is what it costs per year of service, and how many times you expect to have this conversation again before you sell the house.

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Doing the arithmetic honestly

Architectural asphalt realistically gives you twenty to twenty-five years in a normal climate. Standing seam metal, installed properly, gives you forty to sixty. So the second asphalt roof is not a hypothetical — it is a scheduled expense, at whatever labour and material cost exists two decades from now.

Run it per year and the gap narrows sharply, often to almost nothing. What the arithmetic cannot do is move money through time for you: metal asks for all of it today, and that is a real constraint rather than an objection to argue away.

The costs that never make the quote

Both materials carry expenses that sit outside the headline figure, and they are not the same expenses.

• Asphalt sheds granules, which means gutter clearing every year or two
• Metal needs almost nothing, but a dented panel is a specialist repair
• Some insurers discount impact-rated metal; very few discount asphalt
• Tear-off and disposal is charged twice over an asphalt lifecycle, once over a metal one

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When asphalt is simply the better answer

If you are selling within five years, the metal premium will not come back to you at closing in most markets, and pretending otherwise is how people get talked into roofs they do not need.

The cheaper roof is not the cheaper decision, and the expensive roof is not automatically the better one. It depends entirely on how long you intend to own the house.

Complicated rooflines change the maths too. Metal is largely trim work on a house full of dormers and valleys, and the labour on that can push the premium well past three times rather than two.

How to compare two quotes properly

Ask both contractors for the same three numbers: expected service life, what is excluded from the warranty, and what the decking contingency is if the sheathing turns out to be soft. Quotes that differ by thousands usually differ on those three lines, not on the shingles.

And ask what happens in year twelve. Asphalt is easy and cheap to repair locally; metal rarely needs repair but costs more when it does. Neither is a flaw. They are just different shapes of the same money.