Not sure where best to post this so please move if neccesary. How tightly should you plaster around gas pipes. I have a gas pipe coming through my back wall into the kitchen. The hole it comes through is bigger than the pipe and therefore there is a bit of a draft coming through. My solution would be to seal the gap with repair plaster but wanted to make sure that it would not damage the pipe by restricting movement when it expands and contracts in cold weather.