Tyvek, Felt or ?? Under cedar shingles

Hello everyone, I am glad I found this forum.We’ve just purchased a 140 year old house in Western Head, Nova Scotia.  One project that’s needed is to replace the ageing… Hello everyone, I am glad I found this forum.We’ve just purchased a 140 year old house in Western Head, Nova Scotia.  One project that’s needed is to replace the ageing…Read MoreGreenBuildingAdvisor