##Cracks at windows, doors and the crawl hatch You cut draft tape made of flexible and self-adhesive material to size and stick it in the frame or the edge where the window or crawl shutter falls.
Sealant & foam
Sealant and foam are liquid. Once applied, it must harden before it can be painted over. Sealant: use a sealant gun and a suitable product. Also check old sealant edges. Foam is useful for hard-to-reach places and comes in a spray can.
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Saves 100 to 200 euros per year.