Pop Goes The Hatch (Weasel) And So Does Your Energy Bill.
By Robert Butler, Montreal Home Inspector | Aspect Inspection
(Aspect Inspection)
How many times do I see the following condition; a popped hatch. Yes it’s popped open or lifted when a door or window is opened somewhere and it’s a windy day or the wind is hitting that side of the house. The sudden increase in air pressure will lift the hatch (it’s not heavy). It can even be pulled up as sudden gust of wind create a low pressure zone over the roof. This partial vacuum will pull higher pressure air form the house, lifting the hatch cover with it. Most times it will just fall back down to the same place but sometimes it will catch due to misalignment and will stay open or partially open. In a closet this may never be noticed till the next service call or inspection requires attic access. The heated (or cooled) air that can be lost through this is just phenomenal. Just ...
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