It seems like Tyvek Housewrap is the go-to product to wrap a timber frame prior to cladding? I did see someone using a similar product which incorporated a sticky strip so you don't need tape, but I can't remember what it was called.
As far as taping do most people use the (expensive) FlexWrap tape or just the regular 75mm acrylic stuff?
As far as taping do most people use the (expensive) FlexWrap tape or just the regular 75mm acrylic stuff?