selluvillaiset

Selluvillaiset is a Finnish term referring to professionals who install and work with selluvilla, an insulation material made from recycled cellulose, typically treated with flame retardants to improve fire resistance and mold protection. The term combines sellu (cellulose/pulp) and villa (wool), with the -iset suffix denoting a group or profession.

Selluvilla is produced by pulping recycled paper products, refining the pulp, and applying borate-based fire retardants. The resulting loose-fill or blown-in insulation is commonly used in attics and wall cavities. It offers high thermal resistance per inch, good sound attenuation, and a relatively low environmental impact due to recycled content and lower embodied energy compared with mineral wool or fibreglass. It is generally non-toxic once cured but can irritate airways during installation, so proper protective equipment is advised. It is also important to protect stored material from moisture to maintain performance.

Selluvillaiset, as practitioners, perform building assessments, prepare spaces for insulation, operate blowing equipment, and verify that gaps and voids are filled. They work with contractors and homeowners to ensure even distribution, proper settling, and adherence to safety guidelines. Training may cover material handling, fire safety, ventilation, moisture management, and local building regulations. They typically require certification or on-site supervision where mandated by regional codes.

In practice, the use of selluvilla is subject to building codes and European or national standards governing insulation materials, installation methods, and fire safety. Environmental considerations include insulation longevity, recyclability at end of life, and minimizing moisture-related degradation.

See also: cellulose insulation; building insulation; energy efficiency.