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Le Costil renovation employed friction piles for the new addition to the existing structure. Friction piles are particularly beneficial in situations where hard strata are too deep, making end-bearing piles economically unfeasible. They are also well-suited for areas with sandy soils extending to greater depths or when the cost of very long end-bearing piles becomes prohibitive.
The original house, located next to the new addition, likely used a raised slab-on-grade foundation, which may have influenced the decision to use friction piles for the new structure. This approach aligns with the company’s ambitious construction goals of using 0% concrete, 0% plastic, and 100% natural materials. Additionally, every material used in the “Le Costil” project was sourced from within a 100 km radius, further emphasizing sustainability.
To enhance durability without chemical treatments, burned Robinia logs were used, providing natural decay-proofing properties.