rakennusvanne

Rakennusvanne, often translated as building wrap or house wrap, is a synthetic membrane material used in building construction. Its primary purpose is to act as a weather-resistant barrier, protecting the building's structure from the elements. This material is typically installed on the exterior walls of a building, over the sheathing and before the installation of the final exterior cladding.

The function of rakennusvanne is multifaceted. It prevents liquid water from penetrating the wall assembly, thus safeguarding against water damage, mold growth, and rot. However, it is designed to be vapor-permeable, allowing water vapor that may accumulate within the wall cavity to escape. This breathability is crucial for maintaining the integrity of the building envelope and preventing moisture buildup.

Rakennusvanne helps to improve the energy efficiency of a building by reducing air infiltration. Drafts and uncontrolled air movement can significantly impact heating and cooling costs. By creating a continuous air barrier, rakennusvanne contributes to a more comfortable indoor environment and lowers energy consumption.

Installation of rakennusvanne involves careful overlapping of seams and sealing with specialized tapes to ensure a continuous barrier. Proper installation is essential for its effectiveness. Different types of rakennusvanne exist, varying in their vapor permeability, durability, and specific applications. It is a common component in modern residential and commercial construction practices.