Hi all This has only just started, I've been in my house for several years. I recently had the upstairs replastered with new skirting boards and arhivtrave fitted. It appears that since then every night in the early hours there are really load cracking/popping noises that sound like they are coming from the walls or floor? The first night it happened I nearly leapt out of my skin as I thought someone was walking up the stairs. It doesn't seem to do it during the day and I haven't a clue what it is. The reaso I mention the redecorating is I can only assume it has something to do with that, but I don't know why? Has this happened to anyone else or does anyone have an idea to what it could be?