You are reading a single comment by @Sumo and its replies.
Click here to read the full conversation.
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
@Sumo
There's a chance I'm wrong. But I'm pretty sure the rules are that you can't make ventilation worse. So if the original windows didn't have trickle vents there's no requirement for the new ones to have trickle vents. Of course if you've paid for them, and they're not there, I would want the windows I paid for to be installed.
If Fensa registered, they should issue a building regs certificate. The onus does come down to you to get any work certified, so even in worst case scenario, you will need to get the local building control in.