and the most common option is to use a specific letterbox draught excluder. ‘This typically includes a brush or flap to seal ...

Alternatively, you could use a draught excluder. All sorts of shops sell draught excluders, or you could even make one yourself by filling a large piece of fabric with old clothes or rice. Letterbox ...

Help contain heat and boost the effectiveness of your central heating by investing in draught excluders for as little ... or those with a 100mm thickness can be combined with existing insulation ...