Seem to be hitting a few problems with my conversion in the planning stages, I only need building control and they’ve been very helpful however I’m after some advice. My roof beams run parallel to the garage door (which is staying in place), so when I insulate the roof I have to leave a 50mm air gap, how can get airflow across these beams to the outside world, it seems I’d have to drill holes through all the beams (reducing integrity) to a few vents at the front of the garage. I have a gas supply/meter in the garage, (fitted after a gas leak) now apparently this cannot be in the room, I’ve complained to the gas people as I specifically told them what I was going to do and they said it would be fine. This could potentially stop,the conversion in its tracks, however the alternative is to put up a stud wall about 1m into the garage, effectively splitting the garage. So my next question. Would a stud wall with insulation be suffiecient for this, plaster boarded on both sides? I could use that space as storage (wife would be happy).