What is the requirement?

The absolute requirement of AD Q is stated in the box on page 2 of AD Q (shown below). The rest of the document gives guidance as to how this can be met. 


In order to provide reasonable provision to resist unauthorised access, AD Q defines the specification of windows and doorsets that can be fitted into a new dwelling. 

What is the suggested method of compliance?

Accessible doors and windows will need to be proven to have security performance so that they can resist physical attack by a casual or opportunist burglar. The manufacturer or the window or door will need to obtain this proof so that they can supply it to the developer. They have 3 different routes to achieve this:

Option 1: Compliance with Appendix B of AD Q

In theory it is possible for the manufacturer to design their product to EXACTLY meet the specification in AD Q, without undertaking any testing. However, the specification is very limited and if a product meets the Appendix B specification, in reality it is not going to be of much use in the UK market.

This option ONLY applies to doorsets, so windows cannot be proven in this way.

Checklist for compliance via Appendix B

Option 2: Compliance via Test Evidence

The manufacturer can provide test reports which EXACTLY match the specification of the product that they supply. Most manufacturers supply a range of products, so they would need test reports to cover all variations of specification manufactured (including sizes). The products would normally be tested to PAS 24:2012, but there are other standards that are deemed to be equivalent (STS 201, LPS 1175, STS 202 and LPS 2081 are listed in AD Q). AD Q suggests using a UKAS accredited laboratory, so if a non accredited laboratory is used, the manufacturer or the developer buying the product must be prepared to demonstrate the labs equivalent credibility if the test is later called into question. Having testing carried out to cover every variation of design and size would be a massive undertaking, so this option is unlikely to be economically feasible for the manufacturer.

Checklist for compliance via test evidence

Option 3: Compliance via Third party certification

The manufacturer can obtain 3rd party certification for the product, with a scope of approval to include the supplied product. The scope of certification has the same credibility as test evidence, whilst also providing increased confidence in the product, due to the factory production control and audit testing requirements which form part of the certification. As AD Q suggests UKAS accredited test laboratories are used, it follows that the certification body should also be accredited. The certification body will require testing to be carried out, but rather than testing every possible variation, key configurations of the product will normally be chosen, to give the certification body confidence in the complete range of products that is on the scope of certification. This will normally be a more cost efficient means of proving compliance. The 3rd party certification will usually be demonstrated by the manufacturer providing a certificate and scope, and additional verification can be made by visiting the certification body’s website. The makers of this site run a certification body, which can be found at blueskycert.com . 

Checklist for compliance via 3rd party certification

Does AD Q apply to existing buildings?

This regulation only applies to new dwellings, and doesn’t include replacement windows or doors, or windows or doors in extensions.

However,  it would make sense to fit AD Q compliant windows and doorsets in existing buildings for the following reasons:

  • Existing buildings are as much at risk from burglary as new dwellings

  • The additional cost of fitting an AD Q complaint window would be minimal if tackled at the point of installation,whereas an upgrade to a compliant specification at a later stage (for example after a burglary) would normally require replacement windows and doorsets to be fitted.

  • As new housing developments become more secure as a result of AD Q, burglars may divert their attention to other locations – increasing the risk for existing developments.

  • The option of an enhanced level of security on a product could be used to either gain a competitive advantage or provide an opportunity to upsell to an enhanced product.