The short version: asphalt costs less up front and metal costs less over forty years. Which one is right for you comes down almost entirely to how long you’re staying in the house.
We install both and have no stake in which you choose, so here’s the comparison without the thumb on the scale.
Cost
Metal runs roughly two to three times asphalt on the same house. Exposed fastener panels sit at the low end of that range, standing seam and stone-coated at the high end.
Complexity moves the number more on metal than on asphalt. A simple gable roof is efficient in metal. A roof with multiple dormers, valleys and penetrations means a lot of cutting, flashing and hand-work, and metal labor climbs faster than asphalt labor does. If your roof is heavily cut up, get both quoted before assuming metal is out of reach or within it.
One offset: metal can often go over an existing roof without a tear-off, which removes disposal from the job. Whether that’s advisable depends on the deck and the local code, so it’s a question for the inspection rather than an assumption.
Lifespan
This is where the two genuinely separate.
- Architectural asphalt shingles: 20 to 30 years in this climate, with ventilation and installation quality deciding where in that range you land.
- Exposed fastener metal: 25 to 40 years, with fastener washers needing attention from around year seven onward.
- Standing seam metal: 40 to 70 years, with essentially no scheduled maintenance.
- Stone-coated steel: comparable to standing seam, commonly sold with 50-year limited warranties.
Read warranty terms as warranty terms, not as life expectancy. A 30-year shingle is one the manufacturer will prorate a defect claim on for 30 years. It is not a promise of 30 years of roof.
Weather and Hail
Metal wins on wind, fire and impact. It’s noncombustible, panels are commonly rated well above the wind speeds we see, and Class 4 impact-rated steel is available.
On hail specifically, be precise about what you’re comparing. Hail that bruises and prematurely ages an asphalt roof will usually leave a metal roof functioning normally. But large hail dents metal panels, that denting is cosmetic, and cosmetic damage is frequently excluded from both finish warranties and homeowners policies. Metal is the more durable material in hail and it is not immune to it.
Heat and Energy
Metal reflects solar energy where asphalt absorbs it, so a metal roof runs a cooler attic and reduces cooling load through a Tennessee summer. Modern cool-pigment coatings mean you get most of that benefit even in dark colors.
The caveat is that roof surface is one variable among several. A metal roof over an under-ventilated attic will underperform a well-ventilated asphalt roof. If energy is your motivation, have the ventilation assessed at the same time; sometimes the cheaper fix delivers most of the gain.
Noise
Effectively a wash, despite the reputation. Over solid decking with underlayment and attic insulation beneath it, a residential metal roof measures comparably to asphalt. The loud-barn-roof association comes from bare panels over open purlins, which is not how a house gets roofed.
Repairs and Maintenance
Asphalt is easier and cheaper to repair. A damaged section is a few hundred dollars and any roofer can do it. That’s a real advantage and it’s underrated.
Metal needs less repair but the repairs are more specialized, and matching a panel on a roof that’s been fading for fifteen years is difficult. Exposed fastener systems have a genuine recurring maintenance item in the fastener washers. Standing seam has close to none.
Appearance
Entirely a preference question, with one practical note. Asphalt is the default in most subdivisions, and some HOAs restrict metal or restrict its colors. Check the covenant before you get attached.
If you want metal’s performance without a ribbed-panel look, stone-coated steel is the answer to that specific problem. It reads as shake or tile from the street.
Resale
Worth being blunt here, because this is where metal is oversold.
A new roof of either kind helps a sale, mostly by removing an objection rather than by adding value. Metal does not reliably return its premium in this market. Buyers notice a roof that doesn’t need replacing; they don’t consistently pay extra for one that will last another forty years.
So if resale is the reason you’re considering metal, it’s probably the wrong reason. If you’re staying, that changes completely.
So Which One Should You Buy?
Metal, if you plan to be in the house more than about fifteen years, if the roof geometry is reasonably simple, if summer heat upstairs bothers you, or if you’re simply done thinking about roofs.
Asphalt, if you’re moving in the next several years, if budget is the binding constraint, if the roof is complex enough that metal labor gets expensive, or if your HOA settles it for you.
For most homeowners in Middle Tennessee, asphalt remains the right call, which is why it’s on four out of five houses. Metal is the better roof. It isn’t the better purchase for everyone.
Get Both Priced on Your Actual Roof
Averages don’t tell you much. L&L Contractors will measure your roof, price asphalt and metal side by side, and tell you which one we’d choose in your position and why. We install both across Murfreesboro, Nashville, Franklin, Brentwood, Smyrna, Spring Hill and the rest of Middle Tennessee.
Call (615) 577-9103 or book a free roof inspection online.
