The advent of a sleeved letter plate in the design of a replacement upvc letterbox is there for several reasons. Firstly it seals the internal cavity of the door against the ingress of water. Secondly it allows the posting of envelopes and materials much easier. This short product video shows just how the sleeve is designed into a slimline letter plate. The added feature here with this model is that the sleeve can also be detached or cut down for versatility when fitting.
Slimline letter plates are found on some of the older aluminium and upvc doors. Most typically they are fitted through the centre frame section. The sleeved letter plate needs to have a telescopic action to allow for thicker and thinner doors. In this case the door thickness for a centre frame position will usually fall between 40 and 80mm. If you have a slimline letter plate fixed to a panel section on your door then you need a thinner sleeve. This will be between 20 and 40mm thick. In that case you can dismantle the sleeves from each letter plate and cut them down with a sharp tool like a Stanley knife. This is relatively easy to do considering it is plastic and only around 1mm in thickness.
Slimline letter plates for upvc doors are a very versatile design that can be used in many situations where a repair may be needed. If it is just the letter plate that is needed the sleeves can be discarded and the plates attached to the door. If you have a shallow door thickness then just cut down the sleeve. If you need a wide sleeved letter plate to cover an old aperture this may do the job.
Of course this isn't the only uPVC letterbox with a sleeve as it is a standard feature for all of them. At least here you can see what is inside your door if you are replacing upvc door letterboxes for the first time.
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