Here’s the Hive I’d Actually Buy. Insulated polystyrene hives are not a fad. A wooden Langstroth box sits around R-1.2. A dense EPS box lands near R-8. That gap is the whole argument: fewer bees huddled on climate control, more bees on nectar, and a brood nest that does not collapse every time the wind comes off the river. Superior Bee Polystyrene Medium Box – R8 Insulated, Pre-Painted, Fits Langstroth Frames – Durable and Efficient for Honey Storage and Beekeeping : Patio, L