I've put up a 4x3 summerhouse/log cabin last month and I'm now looking to get the inside insulated. I was planning on building stud walls with 50mm celotex covered with sheet timber. My concern is that if I attached the stud wall to the cabin walls it won't allow for any movement. I have the internal storm braces up already but I think adding the stud wall with remove any benefit the storm braces are providing. I've checked YouTube and everyone seems to be firing up the stud walls without a mention of movement being affected. Could anyone offer any advice on how I'd go about getting the insulation done please? Cheers