How To Replace a Letterbox for uPVC Door
If you are looking at how to find and replace a letterbox for upvc door then you are in the right place. If you want to buy a upvc letterbox then select from the range of designs and sizes in our upvc door letterboxes section.
The upvc letterboxes we show on this page are the best generic fit amongst the many designs that were fitted to doors over the past 30 years! Follow the step by step guide here to ensure you are happy that the replacement sizes suit your letterbox. Do remember there is no reason why you can't use them on timber doors as well as upvc and aluminium. Just 3 steps and you're there! Need the actual upvc letterbox sizes or perhaps you have questions about a replacement upvc letterbox?
STEP 1: MEASURE THE OVERALL SIZES OF THE LETTERBOX
The overall sizes are not that critical but the internal sizes are as this will ensure the sleeve will fit through the aperture in your door - see Step 2 below. There is a good video guide that will help you here - how to fit a upvc letterbox.
uPVC letterboxes usually fall into 3 size ranges: 10 inch, 12 inch or 12 inch slimline.
You need to decide which of the 3 letterboxes you have.
- 10 inch letterbox - 265mm x 70mm
- 12 inch letterbox - 305mm x 70mm
- 12 inch Slimline - 317mm x 50mm
STEP 2: OPEN THE EXTERNAL FLAP & MEASURE THE POSTAL SLOT
The uPVC letterboxes on our website have the following postal slot sizes.
To use the 10 inch upvc letterbox model your postal slot size (not aperture in the door) must be in this range:
- Width - 215mm - 245mm
- Height - 37mm - 55mm
To use the 12 inch upvc letterbox model your postal slot size must be in this range:
- Width - 250mm - 290mm
- Height - 37mm - 55mm
To use the 12 inch Slimline letterbox model your postal slot size must be in this range:
- Width - 260mm - 280mm
- Height - 30mm - 40mm
If you are not sure doing it this way then take the upvc letterbox out of the door and compare the aperture with the upvc letterbox sizes.
STEP 3: MEASURE THE THICKNESS OF THE DOOR
uPVC letterboxes all have telescopic sleeves to allow for different door thicknesses. You need to select the letterbox for upvc door that is the most appropriate. uPVC Letterboxes fitted through moulded panels are usually between 20-40mm in size as are timber doors. uPVC letterboxes fitted through the frame are usually between 40-80mm in size.
Watch the video on how to replace a upvc door letterbox- 2mins well spent!
HandleStore provide a wide range of letterboxes including white surround, all metal slimline letterboxes for narrow frames and all include weathersealing and non-rattle properties.