I had an unvented cylinder (250lt) installed last winter into the loft. All working fine but I subsequently found that these cylinders should be installed above a supporting wall. Currently its not. Will this be an issue - do I need to move ? The loft is all boarded but not insulated. I am about to insulate the loft totally (remove all boards, insulate 200-300mm and then re-board) - should I move the cylinder or place some thick boards underneath it.
