Pergola vs. Covered Patio: Which Shade Structure Fits?

How much shade each option really gives

A traditional slatted pergola gives dappled shade and no rain protection. It softens light and defines the space beautifully, and in Midlands July afternoon sun it is not enough on its own if you want to sit through the heat. An adjustable louvered roof closes to shed rain and opens for light — the most flexible option and the most expensive per square foot. A solid covered patio gives full shade and full rain protection and turns the space into an outdoor room.

What each does to the house

A covered patio attaches to the house and interacts with the roofline, which means flashing, pitch and often a permit path closer to a porch addition. Done well it looks original; done badly it darkens the room behind it. Freestanding pergolas sit lightly on the lot and rarely affect interior light at all, which makes them a good answer when the room behind the patio is already dim.

• Pergola — light shade, no rain cover, lowest cost, minimal impact on the house.
• Louvered roof — adjustable shade and rain cover, highest flexibility, premium cost.
• Covered patio — full shade and rain protection, becomes an outdoor room, affects roofline and interior light.

Materials and lifespan

Cedar and treated pine pergolas need finishing on a cycle here; aluminum and fiberglass systems hold their finish with essentially no maintenance and span further, which means fewer posts blocking the view. On lake lots we lean toward powder-coated aluminum for the same reason we lean toward it for railings: humidity and UV are relentless.

Getting the orientation right

A pergola only shades when the sun is high. On a west-facing patio the low afternoon sun comes in under the structure regardless of slat spacing, which is where a solid roof extension or a side screen earns its cost. We look at the exposure and the hours you actually use the space before recommending one over the other.