Warm roof

[Thomo39]

morning, I have built an outbuilding to house an acrylic shelled hot tub , the roof construction is a warm roof , on the inside I planned on using a moisture treated plywood straight onto the ceiling joists, is this correct or would I need a barrier between

 

[blup]

It cant harm to have a second barrier with all that moist warm air, just ensure its continuous where downlights etc break it.

Blup

 

[Thomo39]

Because there is a hot tub in there it will 12v fairy lights fixed to the plywood so the moisture barrier would definitely be continuous, cheers m8

 

[datarebal]

Vcl