Ytterpanel

Ytterpanel, or outer cladding, is the exterior layer of a building's walls. In Swedish and Nordic building practice, it refers to the finish layer that protects the structural wall from weather and contributes to the building's appearance. The outer panel is typically attached to a subframe or battens that create a ventilated cavity, allowing moisture to escape and reducing the risk of mold and rot inside the wall assembly. A weather-resistant barrier is usually placed between the structural wall and the panel.

Materials commonly used for ytterpanel include wooden boards or siding (painted or stained), fibre cement panels, metal cladding such as aluminum or steel, and various composite or vinyl products. Wood is traditional and offers a natural look but requires regular maintenance to preserve color and integrity. Fibre cement and metal options require less maintenance and can offer greater durability, while some composites can mimic wood without ongoing upkeep.

Installation considerations include ensuring proper sealing at joints, a continuous rain screen, and appropriate fasteners to accommodate movement from expansion and contraction. In Nordic climates, a ventilation gap and proper drainage improve durability by allowing any infiltrated moisture to dry.

Fire safety and local building codes influence material choice, with some jurisdictions favoring non-combustible or fire-rated options for outer cladding. The ytterpanel is chosen based on climate, architectural style, and budget, with maintenance playing a key role in longevity.