The SPAX double-thread facade screw is ideal for fastening timber or composite cladding to timber frames. This SPAX screw is designed to work with the timber rather than against it, allowing the timber boards to expand naturally in wet weather and shrink in hot, dry weather. The SPAX fixing thread under the head clamps the facade to the sub-structure, locking the boards firmly in place while working with the timber during expansion and contraction, so loose boards, protruding screw heads and premature failures are a thing of the past.