jeff268

Hi all.. Forgive me if this has been asked before but I wondered whether someone could answer a simple question for me. I recently had new windows fitted and noticed after the event that they didn't install the trickle vents post June 22 regulations. The company were apologetic and said they would fit them retrospectively to the top of sash part of window(the opening part of the window side as per pic) . I read that the trickle vents have to be installed in the * window frame* as of June 22...is this incorrect?