Entry 08 · Doors
Secure replacement doors and hardware
Learn what makes a replacement door secure, from multi-point locks and hinges to test standards and installation checks that deter break-ins.
If you are choosing a new front or back door, you want to know which lock holds the leaf, which hinge carries the weight and which test proves the set. This guide explains what Secured by Design publishes about secure doors and where that source stops, so you can ask clearer questions before you order.
The short answer is that Secured by Design is the official police security initiative, owned by UK Policing, with the aim of reducing crime and helping people live more safely. It offers crime prevention advice and accredited products for the home, and it accredits products and practices against its own standards. The page does not publish lock types, hinge grades, test numbers or fitting tolerances, so you will need to check those points elsewhere.
01 What Secured by Design actually publishes
The site presents itself under the line reducing crime through good design. For homeowners, the offer is straightforward. You can get crime prevention advice and find accredited products that help you protect what matters most. That is the full extent of the promise to homeowners on the page. It does not name a door construction, a cylinder family or a hinge load.
The same page speaks to other readers. It offers guidance, members and accredited products for architects and developers, membership for companies that want to show a commitment to the standard, and education and guidance for the police about reducing crime through good design. If you are replacing one door in England, those parts give context but they do not change what you should look for on the packaging and the order.
02 Why design comes before hardware
The page describes safer building work as improving the security of buildings and their surroundings through effective design and police-approved standards, with the aim of reducing crime and creating safer communities. The idea is plain. A lock works inside a door set, and the door set works inside a wall, a frame, a path and a line of sight. When the layout is weak, even sound hardware has to work harder.
You can use that idea when you walk round your own entrance. Look at how the door sits in the opening, how the frame is fixed, how callers approach and how light falls at night. The page does not give measurements or layouts for these points, and it does not rank one layout above another. It only sets the principle that design and standards work together.
03 How the Police Preferred Specification label works
Only members of Secured by Design can achieve product accreditation known as Police Preferred Specification. That rule matters for you because it links two things you can verify without technical training. First, the company holds membership. Second, the named product has passed the accreditation process. A claim of police approval that does not use that exact label and membership route is not the same thing on this page.
When you compare brochures, look for the exact wording on the product sheet rather than general security language. You can also read about types of replacement doors to see how frame materials shape the questions you put to a supplier, then return to the label and ask which door set carries it. The page does not publish a list of door models in the content on this page, so the label on the sheet and the box is your check.
04 What accreditation says about a door set
Accreditation on this site means that a security product or practice meets its crime prevention standards, and that membership and product accreditation validate compliance with those standards. The site also says that accreditation allows use of its logo on packaging and products, which builds trust and confidence with customers and consumers. In practice you can treat the logo as a shortcut to that compliance claim, not as a description of the lock inside.
If you want the background in its own words, read the official police security initiative pages and follow the homeowner route to crime prevention advice and accredited products. You will not find hinge drawings or lock strip diagrams there in the content on this page, but you will see how the organisation describes safer design, accreditation and promotion of recognised products across the United Kingdom.
05 Why do hinge and fitting details stay off the page?
Hinges, keeps, fixings and alignment decide whether a tested door performs in your wall as it did in the test room, yet the page does not publish hinge types, screw lengths, fixing centres or tolerance checks. That gap is normal for a scheme page. It sets the standard and the route to recognition, while the maker and the fitter choose the components that meet it for a given width, weight and exposure.
You can still protect yourself by asking for the missing detail in writing. Ask which hinge set was used with the accredited door, how many fixings hold each frame leg and what packing and sealing method the fitter uses. The page does not give correct answers to those questions, so write the answers on the order and keep them with the door paperwork for later reference.
06 What should you ask before you agree to a door?
A short set of written questions keeps the conversation concrete. Ask whether the exact door set is accredited and carries Police Preferred Specification, what crime prevention advice applies to your entrance, and how the company proves membership at the time of sale. Ask also what the page does not publish, namely, the lock and hinge specification for your size and the fitting check that will be done on the day.
- Is this exact set accredited, and what name appears on the accreditation?
- Where does the logo appear on the product and the packaging.
- Which lock and hinge set is supplied with this width and weight.
- How is the frame fixed, packed and sealed in my opening.
- Which papers and certificates stay with me after fitting.
The list works because it separates what the scheme can prove from what the supplier must state. The scheme proves membership, accreditation and the right to use the logo. The supplier states the hardware and the fixing method for your wall. If either side is vague, pause the order until the wording is clear and dated.
07 How far can this source take you?
Secured by Design is the only route described on its page for companies to obtain police recognition for security-related products in the United Kingdom. That exclusivity helps you read claims. If a brochure implies police backing without membership and Police Preferred Specification accreditation, it does not match the route the page describes. The page also notes recent news such as a shopfront member joining and an award for a retirement development, which shows the breadth of the scheme beyond individual houses.
For the rest of the job, keep your own file. Note the accreditation name, photograph the logo on the box, and keep the fitting notes with what to keep after fitting so a later buyer or surveyor can follow the trail. Then walk the finished door with the fitter, test the latch and deadbolt from both sides, check the hinges for even gaps and firm fixings, and ask for any loose answer to be put in writing before you pay the balance.