Please can someone help me with the conflicting information I've found and been given? We are in the middle of having a garage conversion. Our gas pipe comes into what is currently the garage in the corner. Can this pipe be put behind a plasterboard wall? Our builder tells us that's fine and it just needs to be accessible so they put a removable section of wall. From googling this I've read all sorts of other information including that it needs to be clad in various rhings, it needs to be vented if its behind a wall, it's totally fine as this is what's done in all new builds. Etc. He says that pipes go through walls, floors etc all the time and you can't vent every space. What's the deal here please? Thanks.