Maybe everyone here can help me. I bought a house with an accessory addon already built, but it's walls and roof are very cheap aluminum. It's a constant source of mold. I'm at the point where I want to demolish it and rebuild properly. Some contractors I've spoken with instead encourage me to just frame out inside the existing aluminum box and get double pane windows instead. I don't think that will solve the problem though, these cheap aluminum panels are so full of mold now how would putting fresh wood over the panels solve anything, in 4 years I'll just have more mold growing over the interior frame out if I don't demolish and rebuild the whole thing with proper moisture barriers on the exterior and underside of the accessory room.