With only some new materials used in the renovation, all of the removed supplies were reintroduced to the home.

Ingeniously, they managed to salvage the cypress boards that composed the home’s south-facing wall and deck for use in the new addition. The original siding was repurposed to serve as the new siding, stair treads and scrim material, allowing the house to keep its aged patina. Not only did this save money and natural resources, but it kept that old, cozy feeling that made the home’s exterior so great. New materials would have needed another 35 years of aging to achieve that same effect.

via Re-Cover House is the Ultimate in Recycling-Remodeling | Calfinder Remodeling Blog.