It also benefits from heavy galvanised chains that won't rust, and the 5th grade Redwood timber is pressure treated to Hazard Class 4 (HC4) making it rot free for as long as 25 years. It is fixed entirely with screws and is designed for stability. The seats are screwed from behind so there are no screws visible from the front. This beautiful swinging hammock is made from the finest timber with a lovely smooth finish and attractive grain. 3 Seat Antoinette Garden Swing. Read the full Churnet Valley wood care guide here. Churnet Valley Items are subject to different terms and conditions available on request. Fully pressure treated to prevent it against rot. The item "Churnet Valley 3 Seat Garden Swing" is in sale since Saturday, October 10, 2020. This item is in the category "Garden & Patio\Garden & Patio Furniture\Garden Chairs".premium" and is located in London.