The critical difference between a freestanding deck and an attached deck is their structural reliance on an existing building. A freestanding deck stands independently from any other structures, supported solely by its foundation, which can be posts, piers, or a solid base. This independence allows for more flexibility in placement and design. It can be beneficial when attaching a structure to the building is not feasible due to building codes, architectural restrictions, or concerns about damaging the existing structure. An attached deck, however, is secured to the side of a building, providing direct access from the building and often creating a more unified look. This attachment requires careful consideration of load-bearing capabilities and waterproofing details to prevent damage to the building.
