Wallpapering for Historic Homes Mastery Hub: The Industry Fo

Which phase of historic plaster preparation, as emphasized in "The Complete Historic Plaster Wallpapering Course 2026," is most critical for ensuring long-term adhesion and preventing delamination of wallpaper, particularly when dealing with compromised plaster substrates?

In the context of "The Complete Historic Plaster Wallpapering Course 2026," what is the primary rationale behind using specialized breathable primers or sealers for historic plaster walls prior to wallpapering, as opposed to standard acrylic or latex primers?

"The Complete Historic Plaster Wallpapering Course 2026" distinguishes between different types of historic plaster (e.g., lime, gypsum, cementitious). When encountering a heavily deteriorated gypsum plaster wall, what specific preparation technique, beyond standard cleaning, is paramount to avoid exacerbating damage during wallpaper removal or application?