Perm rating vapor diffusion port ridge – GreenBuildingAdvisor

hi all,

In the process of spec’ing a siga myvest, or similar for my vapor diffusion port on the ridges.

There are many options I have found in GBA and other locations, but having a hard time getting a supplir for any of them. Considering utilizing the siga myvest(sure im spelling wrong), but unsure of a typical perm rating on this..

any help greatly appreciated.

larry