draught excluder 
noun
A strip of foam rubber, metal, or other material inserted in a door or window frame to keep out draughts.One Sunday our neighbour says she's decided that it is me and could I please ask our landlord to fit draft excluders on our front door....
- Three doors led off the third-floor landing; one to a toilet, one to the master bedroom and the third to the rest of the staircase, acting as a combined draught excluder and fire door.
- Spell-checkers are the worst invention since sausage dog-shaped draught excluders and novelty doorbells.