All housewraps are not equal
Perforated Wraps
A perforated wrap is a two-layered product that requires “micro-perforations” or thousands of holes to allow the product to breathe. Unfortunately, there is a trade-off between air resistance, water resistance and moisture vapor permeability with a perforated housewrap.
Low Perm Microporous Film Wraps
A low perm microporous film wrap is manufactured in a two-part process where a course fabric backing with no protection for a building is laminated with a fragile film in order to pass minimum requirements for water and air resistance. The film layer is delicate and routinely compromised in the real world through tearing and abrasion.
DuPont™ Tyvek® is Very Different!
The DuPont™ Tyvek® Weatherization System consists of products specifically designed for proper moisture management within wall systems. DuPont™ Tyvek® is a uniquely engineered product made by spinning extremely fine high-density polyethylene (HPDE) fibers that are fused together to form a strong, uniform web. The tough structure of DuPont™ Tyvek® is engineered to create millions of extremely small pores that resist bulk water and air penetration, while allowing moisture vapor to pass through.
Literature Available
See related documents, such as FAQs, installation guides and physical property data sheets, in the Technical Information section of this web site.