Oppbygning av gulv/bjelkelag mellom kjeller og 1. etasje. Fuktsperre gulv bjelkelag. Oppbygning av gulv/bjelkelag mellom kjeller og 1. etasje. Lage kjellerstue, valg av isolasjon og andre løsninger. Tyvek. Tyvek house wrap Tyvek /taɪˈvɛk/ is a brand of flashspun high-density polyethylene fibers, a synthetic material; the name is a registered trademark of DuPont. The material is very strong; it is difficult to tear but can easily be cut with scissors or a knife. Water vapor can pass through Tyvek, but not liquid water, the material lending itself to a variety of applications.
History[edit] Tyvek is a nonwoven product consisting of spunbond olefin fiber. It was first discovered in 1955 by DuPont researcher Jim White who saw polyethylene fluff coming out of a pipe in a DuPont experimental lab.[1][unreliable source?] According to DuPont's website, the fibers are 0.5–10 µm (compared to 75 µm for a human hair). Tyvek is manufactured at the Spruance plant in Richmond, Virginia, and in Contern, Luxembourg. Properties[edit] Tyvek USPS Express Mail envelope Among Tyvek's properties are: Adhesion and bonding[edit] Because it is essentially a form of plastic, some adhesives will not bond well with Tyvek.
Fuktsperre gulv.