https://www.diynot.com/diy/threads/new-extension-and-ropey-existing-loft-space-i-need-an-insulation-strategy.489443/
New extension and ropey existing loft space... I need an insulation strategy! | DIYnot Forums
Howdy, I've a new extension with 5in rafters and upstairs ceiling joists, connecting to an exist loft with 3.5in rafters and ceiling joists. I need to...
new extensionloft spaceropeyexistingneed