I normally lurk around in the sparky's forum as that's more my area of interest, but i've heard a few things that worry me slightly. Mainly that only FENSA people are allowed to fit replacement windows now. I used to work as a bench joiner, and have made and fitted all my own hardwood windows. Building control did not seem to have any problem with this. Is there any truth in this? If there is, it's a load of b****s!!!! The only possible time I can see there being any problem with anybody fitting a window is if they make the opening wider and leave the lintel sat on nothing, or fit a replacement lintel that's not big enough. Seeing as I'm probably better qualified than most FENSA people to do the structural calcs on the lintel, this seems a bit silly.