Which Aluminum Roof Profile Fits Your Oregon Home?

Which aluminum profile suits a Portland Victorian or foursquare?

Walk the older blocks of Portland, Salem, or Eugene and the housing stock tells you what the original roofs were. Victorians and foursquares from the 1890s through the 1920s were framed steep, with cross gables, dormers, and turrets, and many of them carried slate or a slate-look composition when they were new. A hundred years on, most of those roofs are on their second or third asphalt layer, and the pitch that once shed slate cleanly now grows moss on every north-facing plane through the seven damp months from October to May. The slate profile is the natural fit here. It is a flat, stepped aluminum shingle with a shadow line that reads as cut stone from the sidewalk, and because it is interlocked on four sides it handles the steep pitch and the complicated valleys that make these houses expensive to roof in anything else. Real slate is off the table for most owners in any case. Slaters are scarcer in Oregon than copper craftsmen, and the framing on a foursquare was not sized for the weight. The oldest photographed Oregon roof in our gallery is a black aluminum slate in Eugene, documented in 2017. Lane County runs about 56 inches of rain, 31 inches of snow, and 34 freeze-thaw days in a typical year, which is a fair test for any flat-profile shingle. Eugene has 64 of these roofs on record since 1998, and the older ones look the way they did the year they were finished.

Should a Craftsman bungalow or coastal shingle-style home use cedar shingle or shake?

Portland's Craftsman bungalows and the shingle-style houses along the coast were designed around wood. Wide eaves, exposed rafter tails, and low-slung gables all assume a textured roof with some depth to it, and a flat panel on one of these houses looks wrong even to people who cannot say why. The trouble is that cedar itself has a hard life west of the Cascades. Wet shakes grow moss faster than asphalt does, the moss holds water against the wood, and a shake roof in the Willamette Valley or on the coast is often done in 20 years. The cedar shingle profile keeps the grain and the staggered butt line of a sawn shingle; the shake profile is deeper and rougher, closer to a hand-split look. On a bungalow with a moderate pitch, the shingle profile usually sits better. On a larger coastal house with steep gables and a lot of roof visible from the road, the shake profile carries the scale. Either way the aluminum gives moss nothing to root into, and there is no wash-and-treat cycle every few seasons. The coast is where this choice matters most. In April 2026 we installed 34 squares of Deep Charcoal cedar shingle on a home in Cloverdale, in Tillamook County, where the ten-year average is 81 inches of rain, gusts to 85 miles per hour, and salt aerosol most of the year. Steel roofing in that exposure rusts at the cut edges and around exposed screws, and many steel warranties exclude oceanfront homes outright. Aluminum contains no iron, so there is nothing for the salt film to oxidize.

What fits a mid-century ranch or a Mediterranean-influenced build?

The mid-century ranch is the most common house in the suburbs ringing Portland, Salem, and Eugene, and it is also the one that most often ends up with the wrong metal roof. Ranches are long, low, and hipped, with pitches that run from moderate down to nearly flat, and their proportions depend on a quiet roof plane. Shake and slate both work on a ranch, but the choice should follow the siding: a shingle profile over horizontal lap siding, a shake profile over board-and-batten or stone. The one thing to avoid on a ranch with a big roof visible from the street is any profile that competes with the house for attention. Mediterranean-influenced homes are less common in Oregon but they exist, particularly among the 1990s and 2000s builds in Lake Oswego, West Linn, and parts of Bend. Those houses were often given concrete tile, which weighs enough to require engineered framing and cracks under freeze-thaw. The tile profile reproduces the barrel curve in stamped aluminum at a fraction of the weight, and it stops the slow failure of a concrete tile roof in a county like Clackamas that averages 36 freeze-thaw days a year. For homes at the wildland edge, and anywhere Oregon's SB 762 wildfire hazard map applies, the profile matters less than the assembly beneath it. Every Interlock profile can be installed as a Class A fire-rated assembly using GAF VersaShield under ICC-ES ESR-2053, which gives a tile-look or shake-look roof the same fire rating as tile without the weight.

When does standing seam make sense on a modern or farmhouse home?

Standing seam is the profile most Oregon homeowners picture when they hear metal roof, and on the right house it is the right answer. New modern builds in Portland's inner east side, the modern-farmhouse plans that fill subdivisions from Hillsboro to Albany, and the working farmhouses of the Willamette Valley all carry simple gable roofs with long, uninterrupted planes. That is exactly where a vertical panel with raised seams looks best and works best. The honest caveat is oil-canning. A broad flat pan will show some waviness in low sun, more so on a dark color on a west-facing slope, and no manufacturer can promise otherwise. It is cosmetic, not structural, but you should see it on a finished roof before you commit. The stamped shingle, shake, and tile profiles hide it because there is no flat pan to reflect light. In May 2025 we installed 22 squares of black standing seam on a home in Warren, in Columbia County, where the ten-year average is 59 inches of rain and about 20 inches of snow. The seams carry water and snow straight to the eave, which is also why standing seam is worth considering in Hood River County, where 76 inches of snow and 55 freeze-thaw days a year make ice damming a genuine problem rather than a theoretical one. On a steep gable in the Gorge or the Mt Hood foothills, snow that slides off a smooth panel does not sit and refreeze at the eave.

How does Oregon's climate change the choice from region to region?

Because all five profiles share the same 3105-H24 aluminum, the same four-way interlock, and the same Guardian Lifetime warranty, the climate decision in Oregon is really about which forces your particular roof faces. In the Willamette Valley, from Portland down through Salem and Corvallis, the enemy is moss and a second asphalt layer, and any profile solves that. The valley's wind is modest, its snow is light, and the choice can be purely architectural. On the coast, in Clatsop, Tillamook, and Lincoln counties, the question is salt, and the answer is any aluminum profile over any steel one. Gusts to 91 miles per hour at the Clatsop shoreline also argue for a fully interlocked shingle rather than a face-fastened panel. In the Columbia Gorge, at Hood River and The Dalles, sustained wind is the daily condition; the four-way interlock leaves no free edge for the wind to get under, and ESR-1790 documents uplift resistance to 177.5 pounds per square foot. East of the Cascades in Wasco County, rain drops to 18 inches but freeze-thaw climbs to 48 days and wildfire exposure rises, so the Class A assembly becomes the first question and the profile the second. We have 374 roofs on record in Portland since 1998, and across those and the rest of the state the pattern holds: the house picks the profile, the region picks the assembly details, and the aluminum does the same job in all of them. If you are not sure which profile your house wants, stand across the street and look at the neighbors that were built the same decade. The answer is usually on their roofs already.

Common questions