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To expand a little more on my last post.
Adding a layer of bubble wrap is like adding a pane of glass. Double pane being better than single. Triple being better than double. Having double or triple pane glass has some effect upon
radiant heat transfer. However, multiple panes have a huge effect on
conductive heat transfer. Double and triple pane glass use a layer or multiple layers of sealed air to
insulate and reduce conductive heat transfer. Bubble wrap just adds another layer.
Bubble wrap has a added insulation advantage of being made of plastic, which is a poorer conductor of heat as compared to glass.
Having less radiant heat "hours of sunshine" during the winter months also makes insulating a high priority.
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