The complete guide
Why filling matters: glass beads, sand and fibre compared
What actually makes a draught excluder work
The cover is just a bag. The filling decides how well the excluder seals, how long it lasts and how it feels in the hand.
Fibre, sand and beads
Fibre-only fillings, usually polyester wadding, are soft and light. They squash against a gap but a gust or a swinging door can push them out of place. Sand is heavy but can leak out of a split seam and can feel dusty. Glass beads sit between the two: heavy and tidy, they pour evenly into every corner of the fabric so the excluder has no lumpy ends.
Placing it for the best seal
Lay the excluder against the door, not the skirting board, with its length matching the full width of the door. Check the door swings without catching, then nudge the excluder tight against the bottom edge. If the gap is bigger than 8cm, a fixed seal on the door is the better answer.



