Tyvek Commercial Wrap

http://www.dupont.com/products-and-services/construction…

Tyvek Home Wrap

http://www.dupont.com/products-and-services/construction…

15# Felt Paper

30# Felt Paper

Please refer to the referenced Rain Screen Code Change document. Direct any questions that you might have regarding your particular application to your local building code department.

download Rain Screen Code Change here