How the two differ in kind
Both roofs are sold hard into the same market — Florida, the Gulf coast, the Texas hill country, the desert Southwest — and both deserve to be there, but they arrive from opposite ends of the weight scale and almost everything else follows from that. Clay barrel tile is among the heaviest coverings a house can wear; metal panelling is among the lightest. The gap between them is not a few percent, it is a multiple, and it lands as permanent dead load on rafters, on walls, and on whatever is under those walls. On a new build that is a line in the structural design and nobody thinks about it again. On a re-roof of a house that has only ever carried shingles, it is the whole conversation: an engineer looks at the members, their span and spacing, their condition and the load path below them, and the answer either opens the door to tile or quietly closes it. Where the framing is marginal, the choice has already been made and this page is only explaining why.
The second structural fact is which layer keeps the water out, and here the marketing on both sides is unhelpful. A barrel tile roof is a shedding system: the tile takes the sun, the rain and the abuse, but wind-driven water gets past it by design and the underlayment beneath is the actual roof. That has a consequence people discover late — the tile is nowhere near finished when the membrane under it is, so a tile roof's characteristic mid-life event is a lift and relay, stripping and stacking sound tile, replacing the underlayment, and putting the same tile back with the breakage made up. It is labour-heavy and material-light, and budgeting a tile roof without it is the most common way to be wrong about tile. Metal panels do the opposite: the panel, its seams and its end details are the barrier, with underlayment as a backup for the day something is breached. One layer, two jobs, and no hidden clock — and no lift-and-relay either, because when the skin is done the roof comes off rather than going back on. The metal equivalent of a mid-life event is smaller and visible: an exposed-fastener roof gets a re-fastening pass, a coating can be recoated, and a standing-seam roof with its fixings concealed mostly avoids both.
Which leaves heat and wind, the two reasons the reader is here, and the honest answer on both is a mechanism rather than a verdict. Both roofs can run cool, by different means: barrel tile does it with geometry and mass — the arch of the profile, and on a battened build-up the counter-battens under it, leave a ventilated air space over the deck, and that is a property of the shape and the build-up rather than of a finish that can fade — while metal does it with the surface, which means reflectance, emittance, colour and a coating that chalks with age. On wind, neither material carries a rating at all. Assemblies do. Both are available as tested, approved systems in high-wind jurisdictions, and the approval covers the whole recipe: deck, attachment method, fastener type and spacing, and the enhanced fixing that edge and corner zones need. So what genuinely decides this, once the load question is answered, is a short list: how much the roof will be walked on and mounted onto in the next twenty years, how exposed it is to hail and falling limbs, how close it sits to salt air, and whether you would rather own a covering that fails one countable tile at a time or one that fails a whole panel at once.
The factors that actually differ
Show
| Clay barrel tile | Metal panels | |
|---|---|---|
| What the structure has to carry | A large permanent dead load — a multiple of what a shingle roof imposes, carried by every rafter, wall and footing beneath it. On an existing house it is an engineer's assessment before anything is ordered, and in earthquake country mass high on the building is a seismic demand as well as a gravity load. | The lightest of the common coverings. It generally goes onto framing sized for shingles without a structural question, and where the old covering is stripped first the roof ends up lighter than it began — which is why metal is the standard answer when the framing report comes back unenthusiastic. |
| Which layer actually keeps water out | The underlayment. Tile sheds the bulk and takes the UV, but wind-driven water is expected to get past it, and the membrane below is what makes the house dry. You are buying the underlayment's rating and the tile's appearance, and they are not the same number. | The panel. Seams, side laps and the details at ridge, eave and penetrations form the barrier itself, with underlayment as a secondary defence. A breach in the covering is a breach in the waterproofing, so the quality of the flashing work is the roof rather than a detail on it. |
| What the mid-life job looks like | Lift and relay. The tile is stripped and stacked, the underlayment renewed, and the same tile goes back with breakage made good — labour-heavy, material-light, and happening while the tile itself has decades left. Plan for it or be ambushed by it. | Renewal, not relay — but not nothing. The covering is never stripped and put back, because the panel is the barrier; when the skin is finished the roof comes off. What an exposed-fastener profile does carry is a re-fastening pass, replacing screws and hardened washers across the whole roof in one deliberate go, and a coating that can be recoated rather than replaced. A standing-seam roof, with its fixings hidden and free to move, largely escapes even that. Either way the clock is on parts you can see and inspect, not on a layer buried under the covering. |
| How each one handles the sun | By geometry and mass. The barrel's arch, and on a battened installation the counter-battens beneath it, leave a ventilated space over the deck, so a good share of the heat is carried away before it reaches the sheathing, and the tile's own mass delays what does — set the tile in mortar or adhesive foam straight onto the deck and you keep the arch but give up most of the cavity. None of it depends on the colour you chose or fades with the years. | By surface. Reflectance and emittance do the work, so colour and coating specification do the work — a light, purpose-pigmented finish and a dark one behave very differently on the same roof. Battens under the panels rebuild the air gap, but that is an added system rather than the default. |
| How each one fails when the wind gets under it | One unit at a time, then downwind. A released tile is a heavy object in flight and usually breaks what it lands on, so damage spreads from wherever it began. The compensation is that the loss is countable and the roof is rarely gone in one event — and which of mortar, adhesive foam or mechanical fixing was used decides when the first one goes. | Progressively, from an edge. Uplift finds a corner, an eave or the ridge, disengages the fixings there and unzips along the run, so a panel that lets go takes its full length with it and opens the deck at once. Fastener or clip pattern, and the extra density in the edge and corner zones, are what postpone that. |
| Impact, debris and walking on it | Brittle. Hail, a dropped limb or a foot in the wrong place cracks it, and a hairline crack is invisible from the ground while being a direct path to the underlayment. Every service visit is a breakage risk, and there is a correct place to step that not every satellite or antenna installer knows. | Ductile. It dents rather than punctures, which is a cosmetic outcome rather than a leak — though some policies exclude cosmetic damage, so the wording is worth reading before hail season rather than after. Walkable with rules: in the flats, over supports, off the ribs and seams. |
| Salt air and what corrodes | Fired clay does not corrode at all. Salt and UV neither rust it nor bleach it, because its colour is the material rather than a film over it — what does age clay is freeze-thaw and salt crystallisation in a porous body, which is a cold-climate and marine-spray concern rather than a hot-coast one. What corrodes is the flashing, valley metal and fixings — a small share of the roof, visible on inspection, and renewed anyway at relay time. | The whole surface is metal, so alloy, coating and detailing carry the exposure: substrate chosen for marine air, dissimilar metals kept apart, cut edges respected. On exposed-fastener profiles the gaskets are the maintenance clock, and daily thermal movement works fixings loose as reliably as weather ages them. |
| Repairing it, and matching it | A tile at a time — if you have the tiles. Profiles and colour lots are discontinued regularly, which makes the spare stack left in the garage after the job worth far more than it looks; matching a decade-old barrel to a current catalogue is the hard part of an otherwise simple repair. | A panel in principle, a run in practice. Standing seam is interlocked with its neighbours, so a panel in the middle of a slope means unpicking the ones beside it; exposed-fastener sheets come off more easily. Either way weathered colour and a fresh coil rarely match on the first attempt. |
| How the cost scales | With area, and then again with cutting. It is heavy on both material and labour, and the geometry adds a second layer of cost: every hip, valley and rake is a cut in a brittle unit, which is why the calculator's waste allowance is a range rather than a habit, and ridge and hip work scales with linear metres on top of that. | With area for the panels and with perimeter for everything else. Trims, closures, valley and wall flashings and penetration details are counted along edges and around obstructions, so a cut-up roof shifts a large share of the cost off the area figure entirely — while a long simple slope is where the panel run is at its most efficient. |
Which one, and when
Choose clay barrel tile when…
- The framing already carries tile — you are replacing an existing tile roof, or building new with the load in the structural design. The hardest gate in this comparison is already open.
- Attic heat is the brief and you want the mechanism to be permanent: a battened, ventilated space under an arched profile does not chalk, fade, or depend on the colour that looked best on the sample board.
- Salt air and hard sun are the enemies. Fired clay does not corrode and does not fade, and the parts of the roof that do corrode are small, inspectable and replaced during the relay you were budgeting for anyway.
- Nobody will be living on this roof: no solar in the plan, few penetrations, and services already where they are staying. Tile rewards being left alone.
- Barrel tile is what the street, the climate and the resale expectation want the house to look like — and you accept the lift-and-relay contract as part of owning it rather than discovering it mid-ownership.
Choose metal panels when…
- You are re-roofing a house framed for shingles. Adding tile weight means an assessment, possibly reinforcement, and a project that stops being about roofing — while panels go on the structure you already have.
- Trees, hail or storm debris are a normal part of the year. A covering that dents and stays watertight beats one that cracks invisibly and hands the problem to the underlayment.
- The roof will be worked on: solar now or later, condensers, aerials, servicing. Seams take clamps and metal takes a flashed penetration; tile takes a breakage risk on every visit.
- Long, simple slopes and a programme that has to beat the season — panels run full length from eave to ridge and the slope is watertight the day they are fixed.
- You would rather the barrier and the wear surface be one tested assembly with one uplift approval than a shedding layer over a membrane whose remaining life you have to track separately.
Now run your own numbers
This page holds no prices on purpose — a national average is wrong for almost every real project. Quantify both options with your dimensions and your local quotes.
Frequently asked questions
- Which one costs more?
- This site does not publish invented figures, so take the answer structurally — it is more useful anyway. Clay barrel tile is heavy on material and heavy on labour, and its geometry taxes it twice: every hip, valley and rake is a cut in a brittle unit, and ridge and hip work is counted in linear metres on top of the area. Metal splits differently — the panel run scales with area and is fastest on long simple slopes, while trims, closures, flashings and penetration details scale with perimeter and obstruction count, so a broken-up roof moves a large share of its cost off the area figure entirely. Then there are two items that dominate both. The first is the structural assessment for tile, which is not a roofing cost at all and yet can decide the job. The second is the shape of the lifetime spend: tile's arrives as one large mid-life lift-and-relay while the tile itself is still good, while metal's is back-loaded to a single replacement — with the caveat that an exposed-fastener profile adds a repeating re-fastening pass along the way that scales with area, which is one of the things you are buying out of when you pay the standing-seam premium. Price the whole ownership period, not the installation, and get local quotes against your own quantities from both calculators.
- Will my roof structure take clay tile?
- No web page can tell you, and any that does is guessing about your house. What decides it: what covering the roof was originally designed for, the size, span and spacing of the members, their present condition, whether the load path below them — walls, headers, footings — was sized with that weight in mind, and in seismic regions how much extra mass the building can accept high up. That is an engineer's assessment, and the honest planning advice is to get it before falling for a particular tile, because reinforcement work changes this comparison completely rather than adding a line to it. Two shortcuts are worth knowing. An existing tile roof is proof the structure carried tile once, so the question becomes condition rather than capacity — but check the weight of the new profile against the old, because they are not interchangeable. And where the answer is marginal, that is itself the answer: the roof that needs no argument is the light one.
- Which survives a hurricane better?
- Neither material has a wind rating. Assemblies do, and that is not a technicality — it is the entire answer. Both clay tile and metal panels are sold as tested, approved systems in high-wind jurisdictions, and the approval covers the whole recipe: the deck and how it is fastened, the attachment method, fixing type and spacing, and the increased fixing density that edges and corners require because that is where uplift is highest. Ask for the approval document that matches what will actually be installed on your roof, at your exposure, and treat a covering discussed without one as a sample rather than a specification. Where the two genuinely differ is the failure mode. Tile fails a unit at a time and each released tile tends to break what it hits, so damage spreads downwind but the roof is rarely lost at once; metal fails progressively from an edge and a panel that disengages takes its whole length and exposes the deck immediately. Underneath both, the deck's own fastening and the connections tying roof to wall decide whether a damaged roof becomes a wet house — and those are the same job whichever covering sits above them.
- Which one keeps the house cooler?
- Both can be genuinely good, by mechanisms different enough that the comparison is not a single ranking. Tile works by geometry and mass: the arch of a barrel, and on a battened roof the counter-battens beneath it, leave a ventilated air space over the deck, which carries heat away before it reaches the sheathing, and the tile's own mass delays and flattens what does get through. That is a property of the shape and the build-up rather than of a finish, so it does not depend on colour and does not age — though it is worth asking how the tile will be fixed, because mortar-set or foam-set tile bedded straight onto the deck keeps the arch and gives up most of the cavity. Metal works by surface — reflectance and emittance — which means a light, purpose-pigmented finish performs very differently from a dark one, and the property lives on a coating that chalks with the years. Metal can borrow the tile's trick by being battened over the deck, at the cost of an extra system. The honest closer applies to both: attic ventilation, a radiant barrier and insulation depth move the indoor result more than the covering does, and they cost a fraction of a re-roof. Do not buy a roof to solve a ceiling problem.
- What about hail and falling branches?
- This is where brittle and ductile part company most sharply. Clay cracks, and the cracks that matter are the ones nobody sees — a hairline through a barrel is a direct route to the underlayment, and because the underlayment is the actual waterproofing, the house can stay dry for years while the damage sits there uninspected. Metal dents, which is ugly and, unless the panel is pierced or the coating broken, not a leak; the catch is on the paperwork rather than the roof, since some policies exclude cosmetic damage and dents are exactly what that clause is about. Impact-resistance classifications are published for individual products in both families, so ask for the rating of the product being quoted instead of trusting the reputation of the material. And factor in the trees themselves: an overhanging limb that will one day come down is an argument for the covering that bends.
- How do I use the two calculators on the same roof?
- They take the roof from opposite directions, which is worth knowing before the numbers look inconsistent. The clay barrel tile calculator works from sloped roof area divided by the net coverage of a single tile — take that coverage from the manufacturer's data for your profile and headlap, never from the tile's own dimensions, because a barrel overlaps its neighbour at the side and the course below at the head. Its waste allowance is where the geometry lives: a plain gable with two clean rakes sits at the bottom of the range, a hipped roof broken up by dormers with a cut on nearly every course end sits far above it. The metal panel calculator counts panels along one slope instead, dividing the eave length by the published coverage width — the net figure after the side lap, not the overall width — with the panel length being the true sloped eave-to-ridge run plus what the ridge detail and the overhang need. Both tools count field material only. Ridge and hip tiles, eave closures and birdstops, trims, valley and wall flashings, fixings and the underlayment are all separate, and on a cut-up roof they are a large share of the order rather than a rounding error.