Thanks @JohnMo
@joth I have a set of French doors which do not have any trickle vents at present but I have bought some to fit retrospectively. A bit of both really, as the room isn't in use yet (bare insulated concrete floor and painted plaster) I haven't been down too much over the last couple of months to turn heater on but have noticed the glass on the doors are pretty wet when I do pop down. As it is SIPS it does seem super well insulated so have been looking at ventilation for air flow to avoid any potential moisture or mould issues
My use is more for leisure purposes, looking to have a pool table, dart board & tv just as a little family room to use year round. Definitely will more than likely leave doors open during the hot summer months when in use
What method are using for your build? Are you going down the SIPS route like myself?
Rob