Draughts through windows and doors in an uninsulated building can account for as much as 10-15% heat loss. weather sealingmakes a building more comfortable, because the heat is retained in the room, which means the heating controls can be turned down. It can stop doors and windows rattling and may even make them easier to open and close. It also lessens the chances of corrosion and decay by excluding rain and wind, not to mention dust and noise

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