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Hand-applied Castelle finish.
The Castelle Prism Sofa High Back Deep 3-Seater delivers clean lines and generous proportions for outdoor spaces that demand both style and comfort. An outdoor sofa is a multi-seat upholstered seating piece designed to withstand exterior conditions while providing lounge-style relaxation, and this three-seat model features a supportive high back, deep cushions, and handcrafted aluminum construction. The Castelle Prism Sofa High Back Deep 3-Seater is available at Sideboards and Things with free shipping. Built from powder-coated extruded aluminum, the frame resists rust, corrosion, and fading -- making it a practical choice for poolside installations, coastal patios, and year-round outdoor furniture arrangements.
The 82.5-inch width accommodates three adults comfortably, while the 28.5-inch seat depth and high back design invite extended lounging sessions on decks, terraces, and covered porches. Pair this sofa with complementary pieces from our outdoor sofas and outdoor accent chairs collections to create a cohesive seating zone, or use it as the anchor piece in a poolside conversation area. The rust-resistant aluminum frame and moisture-resistant cushion casings require minimal upkeep -- occasional rinsing and spot-cleaning keep the sofa looking fresh season after season.
Comfortable addition to patio lounge
With true deep seating dimensions, this sofa invites guests to sink in around the fire pit on a covered patio, and the customizable frame finish helped it match existing metal pieces. The welded extruded aluminum frame makes it feel durable for seasonal use.
Lots of fabric and frame choices
Customizable frame and fabric options made it easy to match a rooftop terrace color scheme since there are 20+ powder-coated frame finishes and 100+ Sunbrella fabric choices. The coastal style fits outdoor settings without feeling out of place.
Sturdy but a bit heavy to move Castelle Prism High Back Deep Seater Outdoor Sofa 2
The welded extruded aluminum frame with powder-coated finish gives a sturdy feel for a backyard lounge, but it can be heavy to reposition without help. You may want two people when moving it. Otherwise the deep seats are comfortable for long chats.
A little different in person Castelle Prism — Castelle Prism Sofa
It is a decent piece, though the tone and finish looked slightly different from the listing image. We also expected something a little softer or lighter in feel, so it took some adjustment.
True deep seating for tall adults
The 28.5-inch seat depth actually lets adults sit fully back with good leg support, which is rare in outdoor sofas. It works especially well on a covered deck when you want to stretch out.
