seinämäkerrosten

Seinämäkerrosten is a Finnish term used in construction and building science to refer to the individual layers that make up a wall assembly. The concept encompasses the full vertical sequence of materials, from the inner finishing layer to the outer cladding, and includes structural layers such as studs, insulation, vapor barriers, and sheathing.

In residential and commercial buildings, wall layers are designed to provide structural integrity, thermal performance, acoustic dampening, and protection against environmental moisture. Typical materials used in seinämäkerrosten include gypsum board, plaster, plywood, fiber‑cement boards, and various types of insulation such as expanded polystyrene or mineral wool.

The layering sequence varies with building types and local climate. For example, in cold regions it is common to incorporate a thick outer layer of insulated sheathing followed by a water‑resistive barrier, while in warmer climates the outer layer may prioritize breathable membrane systems to reduce condensation risk.

Building codes in Finland, such as the National Building Code, prescribe minimum requirements for wall assemblies, including fire resistance ratings and thermal resistance (U‑value) targets. Properly designed seinämäkerrosten contribute to energy efficiency, indoor comfort, and structural safety, and are evaluated through thermal imaging, moisture testing, and sometimes destructive sampling during post‑construction audits.