You are reading a single comment by @pryally 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.
chrisbmx116
@pryally
I've done that detail on all my windows (arch tech) and I believe it is recommended by Velux to aid air flow. The channel top and bottom is angled on one side to accept the palsterboard at an angle.