UAP 12 Inch DOORMASTER Letterplate

Features Include:

The UAP 12 inch DOORMASTER letterplate combines security with a modern and contemporary look. Each letterplate consists of a colour matched frame for a stylish look. The matte finished frame conceals any scratches that may have appeared during installation. DOORMASTER still retains the best elements of the ever popular Framemaster® range, making it the ideal choice for a product which is both stylish and incorporates anti-vandal features.

  • Has a central sleeve meaning that it can fit in waste (mid) rails
  • Modern and contemporary looking
  • Enclosed, round flap set against a shallower frame – gives a less intrusive but sleek feel to the door or frame
  • 40-80mm sleeve thickness suitable for wooden and composite doors
  • 180 degree opening flap means the flap will not snap off when opened too far
Document Q

Available in:

White White
Black Black
Gold Anodised Gold Anodised
Silver Anodised Silver Anodised
Polished Silver Polished Silver

Features Include:

Has a central sleeve meaning that it can fit in waste (mid) rails
Enclosed, round flap set against a shallower frame - gives a less intrusive but sleek feel to the door or frame
Modern and contemporary looking
Matt finished plastic frame conceals any scratches that may be caused by screwdrivers during installation
Comes in 2 sleeve thicknesses – 20-40mm for uPVC doors and 40-80mm for wooden and composite doors
Outward facing brushes create the Anti-Vandal feature as it prevents vandals from placing unwanted items into the cavity
Outwards facing brushes also means better draught proofing and makes it easier to post letters through
180 degree opening flap means the flap will not snap off when opened too far
Blind bolts to the exterior of the letterplate prevents the outer frame being unscrewed from the door externally
An internal water seal prevents water getting into the door or panel, and stops letters getting wet
Ultra-flexible springs can withstand the letterbox flap opening thousands of times without breaking
Conforms to many standards and testing requirements including BS EN 13724

The UAP 300mm 12 inch DOORMASTER letterplate is ideal if you are looking for a more modern and contemporary letterplate. The DOORMASTER letterplate range consists of an enclosed, rounded flap set against a shallower frame, giving a less intrusive but sleek feel to the door or frame.

Each DOORMASTER letterplate has a central sleeve, meaning that it can fit in waste (mid) rails. The cavity dimensions also mean that you do not need to change CNC machines routing dimensions in order change over to this modern letterbox.

The cavity hole dimension to drill into your doors in order to fit the 12 inch DOORMASTER letterplate is 258mm x 42mm.

On the UAP 12 inch DOORMASTER letterplate there are many features that are not found on standard letterboxes. This includes the trademarked Anti-Vandal facility. Each year house fires are started by vandals putting fireworks through letterboxes. Each UAP letterplate has the brushes outward facing (a feature no other letterplate in the industry has). This gives 3 great benefits:

1 - Having brushes on the front of the door acts as a visual deterrent to vandals. As the internal cavity is not easily accessible, it makes it a lot harder to put lit fireworks etc. into the cavity.

2 - It is easier for postmen to navigate letters through the brushes, so you won't end up receiving crinkled letters anymore.

3 - The brushes stop draughts at the point of entry, making the letterplate draught-proof.

Another great feature of all UAP letterplates is that each letterplate flap can open to 180 degrees, meaning that it should not snap, and making letterplate flaps snapping off a thing of the past. Many letterplates in the industry only open to 90 degrees, so when too much force is applied when lifting the flap up, it causes them to snap off. The ultra-flexible springs means that they can withstand thousands of openings without breaking, making them last even longer. Also, an internal water seal also prevents water getting into the door or panel, which stops letters getting wet as they are posted through, and also helps to prevent the flaps from pitting or rusting.

Product Codes

Finish 20-40mm Door Opening 40-80mm Door Opening Plastic Frame Colour Flap Material Construction Coating Guarantee
Gold Anodised DMB1224G DMB1248G Black Aluminium 5 Years Inland
Silver Anodised DMB1224SA DMB1248S Black Aluminium 5 Years Inland
Black Powder Coat DMB1224B DMB1248B Black Aluminium 5 Years Inland
White Powder Coat DMB1224W DMB1248W Black Aluminium 5 Years Inland
Polished Silver DMB1224PS DMB1248PS Black Aluminium 5 Years Inland


Technical Info:


Distance Between Screw Holes 280mm
Letterplate Length 300mm
Letterplate Height 65mm
Frame Material Plastic
Cavity Hole Size 258mm x 42mm


testing icon

At UAP we are constantly striving to improve on the products we already supply as well as develop new, pioneering ranges and practical product solutions.

With an in house testing centre and product developer, each stage of the development process is thorough, from the initial design right down to the final product. In house 3D printing technology allows for further and more precise advancement of our products which are then expertly manufactured and put through stringent testing conditions using in house test equipment – ensuring all products are designed to the highest standards:

Letterplate Flap Cycle Machine

By replicating the action of opening and closing the letterplates flaps, the machine can determine the durability of the hinge mechanism on the product. The flaps are repeatedly opened and closed to ensure they can withstand thousands of openings without snapping or breaking, promising a product that will last much longer than others in the industry. The process is repeated to 100,000 repetitions – with only 15,000 required by testing standards. Tests are performed in accordance with BS EN 13724:2013.

Salt Spray Test

This machine tests the corrosion resistance of the letterplates. The salt spray cabinet produces a corrosive environment, by releasing a dense saline fog into the chamber which the letterplates are exposed to. This creates an accelerated corrosion of the letterplate and allows us to test how well the letterplate would stand up in harsher environments.

The letterplates are tested for differing lengths of time depending on the standard requirements; 480 hours for zamak and aluminium based letterplates where we offer a 5 year inland coating guarantee, and in the case of stainless steel Nanocoast letterplates, we test for 2,000 hours where we offer a LIFETIME coating guarantee anywhere in the country, as the letterplates will not pit or rust.

Tensile Strength Test

The tensile strength machine tests the resistance of a material to breaking under tension. It is used to see how well the letterplates perform when pressure is applied to them. The letterplates are attached to pieces of timber or plastic to see how well the fixings perform with the letterplate, which gives a more accurate test on the overall letterplate performance.

All Weather Machine

When placed in the all-weather machine, the letterplates are subjected to conditions including high UV exposure using a Xenon Arc Lamp which will accelerate UV degradation and measure how well a letterplate can last in extreme conditions.

Other conditions such as rain and extreme heat can be generated by the machine to expose the letterplates to all kinds of environments. This allows us to continually improve the letterplates and make them so they last longer in all kinds of different environments.

Doormaster Tech Sheet front

Doormaster Tech Sheet

Size: 798 KB | Type: pdf
2016 document q brochure front

UAP Document Q Brochure 2016

Size: 9 MB | Type: pdf

UAP Letterplate Guarantee 2018

Size: 99 KB | Type: pdf

Letterplate Guarantee:

UAP Ltd distribute a wide range of letterplates, with flaps made from aluminium and Nanocoast 304 or 316 grade stainless steel.

The letterplates are available in a range of colours, and we guarantee the letterplates and finishes against the following:

Surface Coating Failure

Coating Guarantee = the sooner of “the guarantee supplied for the door or window from the manufacturer” or “5 years inland” on aluminium based flap letterplates or “Lifetime” on Nanocoast 304 or 316 grade stainless steel based flap letterplates.

We guarantee that the letterplates will not tarnish on the door for the guarantee period given above subject to;

1. The letterplates are applied to a door or door panel, and no item of door furniture on the door or door panel are sealed or fixed using any form of silicone sealant or the like.

2. The letterplates are fixed correctly and the right way around with the brushes facing to the outside using the correct fixings, and are not scratched or damaged at any time during the installation process or thereafter.

3. Nanocoast 304 or 316 grade stainless steel based letterplates are cleaned with a lemon based very mild soap solution and a soft cloth once a month, or every 2 weeks in areas of high sea salt such as coastal areas. At no point should any form of cleaning agents be used.

4. Aluminium based letterplates are installed inland (defined as 25 miles from the coast or 5 miles from highly populated industrial areas) and are cleaned monthly with a moist cloth. At no point should any form of cleaning agents be used.

5. No claim will be accepted for any letterplate that is scratched or mutilated or fitted incorrectly.

6. The guarantee only applies if the letterplate is fixed to the original door for which it was bought and fitted by the installer. The guarantee will cease immediately if the letterplate is removed from the original door or door panel.

Mechanical Failure

Mechanical Guarantee = the sooner of “the guarantee supplied for the door or window from the manufacturer” or “5 years inland” on aluminium based flap letterplates or “10 years” on Nanocoast 304 or 316 grade stainless steel based flap letterplates.

We guarantee that the letterplates will not fail mechanically the door for the guarantee period given above subject to the conditions outlined above.

Claiming Under the Guarantee

Every product must be inspected before they are fitted on to a door, window frame or door panel for any defects. If any defects are found then the product must not be fitted and the fault reported immediately to UAP Limited. Any product fitted is assumed to have been inspected and approved as being fit for purpose.

To make a claim under the guarantee, UAP Limited must receive in writing the product code of the item, the full details of the problem, the date the product was purchased, the date of manufacture of the unit in question and the address of the installation.

We will require all ‘faulty’ items to be sent to ourselves at the address below by first class recorded delivery post. We will then examine the item in question and confirm whether the item is covered by the guarantee. If it is not covered by the guarantee we will advise you, the customer, in writing of the reason for rejecting the claim.

Limitations of the Guarantee

UAP Limited’s guarantee will be limited solely to the replacement of the item purchased from UAP. There is no liability whatsoever for consequential damages or costs, howsoever calculated or incurred. UAP Limited will enforce and rely fully upon their terms and conditions of sale in all aspects other than the limitation set out above. UAP will also pay for the cost of the recorded delivery, if and only if, the product is deemed to be covered by the terms of the guarantee set out above.

Payment of the Guarantee

UAP reserve the right to discharge the guarantee claim in the form of replacement products at the customer’s normal buying price at the time of the complaint being received by UAP Limited.

Time Limit on Guarantee Claims

UAP will only be liable for claims made within a maximum period of 10 years from the date of purchase of the products from UAP Limited.

Correspondence Address for All Guarantee Claims

Any guarantee claim must adhere to the system set out above in all respects and must be made in writing to: UAP Limited, Orbital 60, Dumers Ln, Bury, BL9 9UE.

The terms of this guarantee may be varied by UAP Limited at any time at our own discretion. Please see for up to date product guarantees.

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