Ah yes, yes, the plastic sheet (cellophane of the type used to wrap flowers) is very very good. To try but more insulating than glass, because cellophane is not conductive (unlike glass which is very conductive) and what insulates is the trapped air layer (2 the es if you put a second film outside). And to renew indeed, because the film crumbles and the glue of the scotch tape becomes difficult to remove after one year it fuses on the wood.
As long as we are there in the “do it yourself” we must put hollow body joints by ensuring that the small bead of air inside is well joined at the intersection. The best (and only good ones) have a “d” shaped “cup” shape
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Why hollow body and not the cheaper flat gaskets? For several reasons:The air passes through the flat foam joints, in particular at each vertical/horizontal intersection (since they can hardly be made to follow right angles, under penalty of a hardly desirable stretching / thickening in the contours), and joints hardly hermetic.
Because the hollow body joints are very superior since they can easily and must be posed all the way around and end in a bevel to block the mini air duct they contain in order to make them hermetic (every detail counts to have a "gain")
Because the hollow body seals do not let anything through, either they are flattened, or they unfold in the interstices if they exist, which ensures continuity and a perfect AND REQUIRED tightness of
insulation.
For doors and windows and to be put everywhere (just as if you put cellophane film, you have to put it everywhere too (the insulation performance of the whole will be penalized by its weak link, (not to be forgotten for example an air duct in the bathroom or in the kitchen that must be sealed with foam when heated) It goes without saying but so much better by saying it!
The same applies to the entrance door thresholds, which if they do not exist see the hot air escaping from below the door.
Fortunately (in addition to the “d” joint) there is this
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This must obviously overlap with the “d” joint,