I am currently doing an owner build and stuck on what I should be doing under the decking of our alfresco. Should I be laying Scyon sheeting, battens and waterproofing or leaving just timber and joists? The area directly underneath is the entrance to our garage (2x Double Doors), nothing more. Other than the tidy look of having the underside of the decking roofed, I'm unsure if this cost is really worth it? Alfresco is ~11.0m x 4.5m.
What are your opinions, I need help with this decision!
I have attached a photo of the plans.