THE ALUGLOBUS PATIO GUIDE / ALU TANK™ + ALU FLEX™ + ALU FLOAT™ A regular pergola gives you filtered shade. A solid patio cover gives you a roof. A louvered pergola gives you both, and lets you switch between them with a remote. That is why it has become the most-asked-about patio cover in 2026. It also raises the same questions every time: How does it actually work, does it keep the rain out, and what does it cost? This guide answers those questions plainly. It covers what a louvered pergola is, how motorized louvers and drainage work, where “waterproof” ends, real 2026 price ranges, and what to check before you buy. It is written by the team behind Aluglobus Aluminum Systems, which builds the ALU TANK™ architectural automatic louver system, the ALU FLEX™ DIY louver patio kit and the ALU FLOAT™ cantilever louver system. Quick answer: A louvered pergola is a patio cover whose roof is made of rotating aluminum blades (louvers). Open them for sun and airflow, tilt them for filtered shade, or close them into a water-shedding roof that drains rain into a built-in gutter and down the posts. Motorized systems run on a remote, an app or a rain sensor. In 2026, most installed louvered pergolas cost roughly $55 to $125 per square foot for motorized systems, depending on size, engineering and options. See the ALU TANK™ louver systemRequest a project quote What is a louvered pergola? A louvered pergola, also called a louvered roof pergola, an operable louver roof, an adjustable-roof pergola or a bioclimatic pergola, is a freestanding or house-attached structure with posts, beams and a roof of parallel blades that rotate on their long axis. That one moving part changes what the structure can do. A traditional open pergola has fixed rafters or slats, so the shade it casts is the shade you get all day. A solid or insulated patio cover blocks the sky completely, which is great at noon and gloomy on a cool morning. A pergola with a louvered roof sits between the two, and you choose the setting. Modern louvered systems are almost always extruded aluminum with a powder-coated finish. Aluminum keeps the blades straight and light enough to motorize, does not rot or need re-staining, and is non-combustible, which matters more every year in California fire zones. A real Aluglobus louvered patio cover in Santa Monica, CA. The roof blades are tilted open over the dining area, and the posts and beams frame the space like a room. How do louvered pergolas work? Every louvered pergola has the same four working parts. How well each one is engineered is what separates a long-lasting system from a weekend kit. 1. The blades (louvers) The roof is a row of aluminum blades, each mounted on pivot points at both ends. On the ALU TANK™ system, each blade is an 8-inch extruded 6005-T6 aluminum profile. A wider, stiffer blade spans farther without sagging and sheds more water per blade. The blades rotate together from fully open (about 90°) through any partial angle to fully closed, where each blade overlaps the next. 2. The drive: motorized or manual A linear actuator or motor hidden in the beam pushes a connecting bar that turns every blade in a zone at once. Motorized systems run from a handheld remote, and many can be upgraded to app control and a rain sensor. Manual louvered pergolas use a crank or lever instead. They cost less and are fine for small spaces, but you have to be home to close them when the weather turns. 3. Zones Larger patios are split into bays, and each bay’s blades can be controlled as their own zone. You could keep the lounge end closed for shade while the dining end stays open to the sky. On Aluglobus systems, one multi-channel remote can run the whole patio. 4. The gutter and drainage path This is the part most buyers never think about and every owner eventually appreciates. When the blades close, rain runs along each blade’s channel to the ends, drops into a perimeter gutter built into the beams, and leaves through downspouts or internal drainage inside the posts. The ALU TANK™ system uses a 3″ × 5-1/2″ gutter profile for that job. Blades fully open on the Santa Monica project: sun and airflow reach the patio while the beams, gutter and optional heater stay overhead. Are louvered pergolas waterproof? A well-built louvered pergola is water-shedding: with the blades closed, rain falling on the roof is collected and drained away, so the patio underneath stays dry in normal rain. That is the honest version of “waterproof,” and it is what people searching for a waterproof louvered pergola usually want. A few limits are worth knowing before you buy: The roof is covered, the sides are open. Wind-driven rain can still blow in from the sides unless you add screens, shades or glass enclosures. The blades have to be closed. A rain sensor closes them automatically when the first drops land, which is why it is the most popular upgrade. Drainage capacity matters. An undersized gutter or blocked downspout can overflow in a cloudburst. Ask how the gutter is sized and where the water exits. Snow and ice need care. In snowy climates the structure must be engineered for the snow load, and blades should not be forced open when they are iced over. It is a patio cover, not a sealed room. Expect a dry patio, not an airtight ceiling, unless the space is designed and permitted as an enclosure. Blades closed into a continuous roof surface. Lighting and heaters like this one are optional add-ons, planned with the structure. Louvered pergola vs. open pergola vs. solid patio cover If you are still choosing a roof type, this is how the three most common options compare in day-to-day use. Feature Louvered pergola Open slat pergola Solid / insulated patio cover Shade control Adjustable from full sun to full shade Fixed, partial shade Fixed, full shade Rain protection Yes, when closed, with gutter drainage No Yes Airflow and heat release Excellent, blades tilt to vent hot air Excellent Limited Natural light indoors You decide, open on cloudy days Good Can darken adjoining rooms Relative cost Highest Lowest Middle Best for Outdoor living rooms, pools, kitchens Garden shade, design accents Year-round shade, budget roof For a deeper side-by-side, see our louvered pergola vs. insulated patio cover guide and the overview of 7 pergola roof types. MOTORIZED LOUVERS / CUSTOM SIZES / ENGINEERED SPANSPlanning a louvered patio cover? Send your patio dimensions and whether it attaches to the house. We will put together a louver system package for your space. Request a quote → How much does a louvered pergola cost in 2026? Price depends far more on size, engineering and options than on the word “louvered.” National cost guides put installed prices in these ranges: System type Installed cost per sq ft Typical 12′ × 12′ installed Manual louvered roof $45 – $110 $6,500 – $15,800 Motorized louvered roof $55 – $125 $7,900 – $18,000 Motorized + smart controls $75 – $175 $10,800 – $25,200 Source: HomeGuide louvered pergola cost data. Ranges are national averages and include installation. So how much does a louvered pergola cost for your project? The biggest price drivers are: Size and spans. More square feet means more blades, beams and posts. Very long clear spans need heavier structure. Freestanding vs. attached vs. cantilever. Attaching to the house or removing the front posts changes the engineering. Engineering and permits. Wind, snow and seismic requirements vary by address, and most full-size louvered roofs need a building permit. Electrical. Motors, LED lighting, fans and heaters need power run to the structure. Add-ons. Screens, automatic shades, glass doors, lights, fans and heaters are optional and add up quickly. Who you buy from. Buying direct from the system maker avoids dealer markup layers. For reference, here is where Aluglobus systems start in our online shop at the time of writing. These are product prices, and installation, freight and site work are quoted separately: ALU FLOAT™ cantilever system with motorized louvers: from $7,580 ALU TANK™ architectural automatic louver system: package pricing from $10,050 ALU FLEX™ DIY louver patio kit, 13 ft × 19 ft: $11,551 – $12,737 depending on finish The cost of a motorized louvered pergola ends up being a combination of those product prices and your local installation and permit costs. Our aluminum pergola pricing guide breaks down the wider pergola market. Pros and cons of a louvered pergola Pros One structure handles sun, shade, rain and ventilation. Tilting blades release trapped heat that a solid roof holds in. Keeps light flowing into the house when the blades are open. Aluminum will not rot, warp or need staining, and it is non-combustible. Adds a finished “outdoor room” that buyers notice. Cons Higher upfront cost than an open pergola or a basic solid cover. Moving parts and a motor mean occasional maintenance, like clearing leaves from blades and gutters. Sides stay open to weather unless you add enclosures. Needs proper engineering and usually a permit, especially when attached. Can you add a louvered roof to an existing pergola? Sometimes, but rarely the way people hope. A louvered roof for an existing pergola adds weight, wind uplift and a drainage system the original structure was never designed for. Most wood pergolas have undersized posts and footings for that, and they have no gutter path for the water. If your existing structure is sound aluminum with engineered footings, an insert may be possible. For most homeowners, replacing the old pergola with a complete, engineered louver system is cheaper over the long run than reinforcing it and retrofitting gutters. What to check before you buy a louvered pergola Blade alloy and size. Ask for the alloy and temper (for example 6005-T6 or 6063-T6) and the blade width. Thin roll-formed blades flex and rattle. Engineering for your address. Ask for a span table or calculations stamped by a licensed engineer. Aluglobus spans are engineered from a California PE-stamped table covering wind speeds up to 180 mph (Exposure C) and ground snow up to 100 psf. Gutter and drainage path. Where does the water go when the roof closes, and can the posts drain internally? Motor, controls and rain sensor. Is the motor concealed? Are app control and a rain sensor available? Warranty in writing. ALU TANK™ blades carry a 30-year blade warranty and a 25-year system warranty (terms apply). Read what is covered on the blades, the motor and the finish. Sizing flexibility. Fixed kit sizes may not fit your patio. Engineered bays that connect side by side and end to end let the roof follow your architecture. Permits. Check with your city or county building department before ordering, especially for attached or electrified systems. Which Aluglobus louver system fits your project? ALU TANK™: architectural automatic louver system The custom-engineered option for homeowners, architects and contractors. It uses 8-inch 6005-T6 motorized blades, 6″, 7″ or 8″ square posts, and 2″ × 8″ or 2″ × 10″ architectural beams. The integrated gutter and post drainage handle rain, and lighting and fans can be planned in. Blade colors include Clay/Tan, Sandstone, White, Gray, Bronze and Black. Explore ALU TANK™. ALU FLEX™: DIY louver patio kit A boxed 13 ft × 19 ft automatic louver kit in 6063-T6 aluminum, with four 6×6 posts, LED lighting, a 110v motor and a rain sensor. Glass doors and automatic shades are available as options. See the ALU FLEX™ kit. ALU FLOAT™: cantilever louver system No front posts, so the patio edge, pool view or driveway stays completely open while motorized louvers do the work overhead. See ALU FLOAT™. Louvered pergola FAQ How long does a louvered pergola last? A powder-coated extruded aluminum louvered pergola is built to last decades. The structure and blades outlast wood by a wide margin, and motors and sensors are serviceable parts. Warranty length is the best indicator of how long a manufacturer expects it to last. Can you leave the louvers closed when it rains? Yes. That is what closing them is for. Rain runs off the closed blades into the gutter and down the drainage path. Keep gutters and downspouts clear of leaves so the water has somewhere to go. Does a motorized louvered pergola need electricity? Yes. Motorized louvers, LED lighting, fans and heaters all need power at the structure, usually installed by a licensed electrician. Manual louvered pergolas do not need power for the blades. Are louvered pergolas worth it? If you want to use your patio through sun, heat and rain, usually yes. You get the ventilation of a pergola and the protection of a roof in one structure. If you only need fixed shade, an open slat pergola or an insulated patio cover costs less. Do I need a permit for a louvered pergola? In most California cities, a full-size louvered pergola needs a building permit, especially when it is attached to the house, has an operable roof or includes electrical work. Rules vary by jurisdiction, so confirm with your local building department before ordering. Can a louvered pergola be enclosed? Many can be fitted with motorized screens, shades or glass doors to block wind, sun and insects from the sides. Turning it into a habitable enclosed room is a different permit category, so plan that with your city first. READY FOR YOUR PROJECT Ready to control the sun and rain over your patio? Whether you need an engineered ALU TANK™ system, a boxed ALU FLEX™ DIY kit or an open-front ALU FLOAT™ cantilever, start with your patio size and how you want to use the space. We will help with the rest. See louver systems →All patio covers →Get a project quote → Prices shown are online shop starting prices at the time of writing and national installed-cost averages. They are for planning only. Final pricing depends on size, finish, engineering, freight, installation and local permit requirements. Warranty terms, limitations and exclusions apply. Related reading and sources Aluglobus: Aluminum patio cover kits buyer’s guide Aluglobus: Louvered pergola vs. insulated patio cover Aluglobus: Zone 0 non-combustible pergolas Aluglobus project: Louvered patio cover in Santa Monica, CA HomeGuide: Louvered pergola cost (motorized vs. manual)