My question to everyone here is, what is your opinion on vertical ventilation? For years and years we preach that venting the roof is a way to let the hot gases escape to prevent flash over and improve conditions inside. Does this really work? Or does the fire produce so much hot gas, that a 4' by 4' h*** in the roof really has a negligent effect on the overall anticipated outcome. It is a question that I hope to one day supply the technical data to support or discount, but what does everyone think? Pictures and video of either side are welcome as well.