Did the installation get signed off by building control or is the company Fensa/Certass registered?
Original windows did not have trickle vents. Company seems to be Fensa registered (according to their website). Tbh I feel terrible about not having asked for some days off work and stayed in to impersonate a project manager...
@Sumo started
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.
Did the installation get signed off by building control or is the company Fensa/Certass registered?