What are some of the materials used and how were they sourced? 

As in most construction projects, the look and feel can end up radically different from how you plan to construct something due to playground standards, safety standards, building codes, and seismic codes. The boards look old and beaten but are new, distressed wood. The framework is all steel, and in fact the treehouse frame was constructed first and the big tree’s branches were attached onto it after. 

The wood is sustainably sourced cedar that has been left to age over time. The net walls, railing, and tubes look like they are made of jute, sisal, or manila rope, but they are actually UV protected nylon, which is much more durable, stronger, and will hold up to moisture and UV light.