We bought a fixer-upper Edwardian house and are slowly making it weatherproof and liveable.
The letterbox currently has no draught excluder or plate, so the wind whistles through. However I can't find one that fits, because the hole is too tall at 80mm. Usually letterbox holes have a height of 40-46mm. The width of 250mm is fine. Can any of you expert mumsnetters find a suitable draught excluder where I have failed? To further complicate matters, it is a vertical rather than a horizontal letterbox, so a closing mechanism that depends on gravity is also not suitable. The bolts are 270mm apart.
Or an alternative solution I saw on a website was to reduce the size of the interior door hole using wedges or slats (usually made of wood or plastic). Any suggestions for where I could buy wedges or slats? Or how-to guides to help me through this?
Thanks very much for any help you can provide