PART Q · Security
What makes doors and windows Part Q compliant
A claim that a door or window is Part Q compliant should be supported by evidence for the relevant product and configuration. A strong lock, heavy frame or marketing label alone does not establish the performance of the completed opening.
What evidence should you request
Ask for product identification and the security performance route, such as the relevant PAS 24 evidence or a justified alternative under the guidance. Check which sizes, glazing and hardware the evidence covers.
The installer should be able to connect that evidence to the unit actually supplied. A brochure for a similar product is not enough.
Why do hardware changes matter
Locks, hinges and other components contribute to performance. Substituting hardware can take the assembly outside its verified configuration.
For example, a door offered with several lock options may not have the same security evidence for every option. Resolve that before placing the order.
What about installation
The frame and fixings need appropriate installation in the surrounding construction. A verified product can still be poorly fitted.
Ask for installation instructions and confirm who checks that the opening and supporting structure are suitable. Include those requirements in the contractor's scope.
Does the product need to satisfy other Parts
Yes, where relevant. Fire performance, safety glazing, thermal performance, ventilation and access can all influence the specification.
A flat entrance door, for example, may need a coordinated fire and security specification. Meeting one requirement should not be used to dismiss the other.
What should be checked at handover
Check product labels or identification, installed hardware, operation and records. Keep the evidence with the drawings and compliance documents.
Identify the openings within Part Q's scope first. Applying a product claim to every window without assessing the building is less useful than a clear schedule showing what is required and what has been supplied.