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Windows (Including Rooflights & Roof Windows)

PAS 24: 2016

Enhanced security performance requirements for doorsets and windows in the UK. Doorsets and windows intended to offer a level of security suitable for dwellings and other buildings exposed to comparable risk.

This PAS supersedes PAS 24:2012 (withdrawn) with effect from 28th February 2016 and provides a method for testing and assessing the enhanced security performance requirements of doorsets and windows.  It covers doorsets and windows of all material types. Products must also meet the general performance requirements as listed below:

BS 6375-1:2015+A1:2016 Performance of windows and doors - Part 1: Classification for weather tightness and guidance on selection and specification

BS 6375-2:2009 Performance of windows and doors – Part 2: Classification for operation and strength characteristics and guidance on selection and specification

BS 6375-3:2009+A1:2013 Performance of windows and doors Part 3: Classification for additional performance characteristics and guidance on selection and specification

BS 6375 parts 1, 2 & 3 certifies that a particular window is fit for purpose. These standards have replaced PAS23:1999 which has been withdrawn.

The test is designed to mimic an attack by an opportunistic burglar, using tools that are easy to conceal.

PAS 24: 2016 must be supported by performance standards relevant to the materials used as listed below:

  • BS 4873:2016 Aluminium alloy windows and doorsets
  • BS 7412:2007. Specification for windows and doorsets made from unplasticised polyvinyl chloride (PVC-U) extruded hollow profiles.
  • BS 644:2012. Timber windows and doorsets. Fully finished factory-assembled windows and doorsets of various types.
  • BWF:TWAS Timber window accreditation scheme.
  • BS 6510:2010. Steel-framed windows and glazed doors.


Enhanced security performance for windows to satisfy performance for windows to satisfy the requirements of PAS 24

This is published by Warringtonfire Testing and Certification Limited.

STS 202 Issue 8: 2019

Requirements for burglary resistance of construction products including hinged, pivoted, folding or sliding doorsets, windows, curtain walling, security grilles, garage doors and shutters.

This is an enhanced test specifying a similar range of attack tools and times to those at the lower levels of LPS1175, including attacks with power tools. However, STS202 does not extend to cover the higher levels of risk addressed within LPS1175 and the attack methods used differ.  It is published by Warringtonfire Testing and Certification Limited.

LPS 1175: Issue 8.0

Requirements and testing procedures for the LPCB certification and listing of intruder resistant building components, strongpoints, security enclosures and free-standing barriers. This standard includes windows for higher risk premises.

Documentation states:

This standard is concerned with physical security, including products manufactured for perimeter, façade, internal spaces and entrapment protection. The higher the security rating, the more formidable the security product.

One of the more substantial revisions to the standard to date, LPS 1175: Issue 8 has been devised to improve the testing guidelines for security products, enabling a far more realistic scope for security ratings. There are a possibility of 48 Security Ratings aimed at creating strategic delay via physical security.

LPCB describe it as:

“Developed following extensive consultation with stakeholders, this revision sees the previous single digit performance classifications (i.e. security ratings 1 to 8) extended to one formed of two elements that illustrate performance in terms of:

Threat level (first element) – Letter (A to H) corresponding with the tool kit used to evaluate the product’s intruder resistance and number of attackers involved.

Delay (second element) – Numeric value (1, 3, 5, 10, 15 or 20) corresponding with the minimum delay (in minutes) provided by the product when placed in a locked condition.”

This revision provides property developers, architects and other security professionals the opportunity to layer their security beyond the capability of previous revisions.

LPS 1175 Issue 8 is the latest revision acceptable to SBD however, some of the older issues are still relevant for historical reasons.  For further information please contact SBD or your local DOCO

LPS 2081: Issue 1.1

Requirements and testing procedures for the LPCB approval and listing of building components, strongpoints, security enclosures and free-standing barriers offering resistance to intruders attempting to use stealth to gain entry.

LPS 2081 specifies two grades of security according to the tools and time taken by an intruder in situations where they want to avoid making excessive noise, replicating a stealth attack common in a residential environment. When LPS 2081 is used as a route to gain SBD approval, SRA is the minimum requirement for a window.

LPS 1270: Issue 1.1

Requirements and testing procedures for the LPCB approval and listing of intruder resistant security glazing units.

Based on LPS 1175, this standard classifies glazing units that offer resistance to manual attack. Approved products are given a 3-digit rating according to their resistance to various levels of penetration; local (to allow a piece of wire or screwdriver to pass through), hand sized or complete access. This also allows manufacturers and specifiers to determine which glazing units offer attack-resistance commensurate with the Security Ratings defined in LPS 1175: Issue 8.0.

LPCB SD 0230: Issue No. 1.03 – Ballistic Resistance

Approval and Red Book listing of ballistic resistant windows, doors, shutters and blinds plus associated glazing – This can also include facades, glazing infills and window frames. Windows certified to LPS1175 and LPS2081 can also be certified with ballistic resistance.


BS EN 356:2000

Glass in building. Security glazing. Testing and classification of resistance against manual attack.

This standard classifies security glazing products into categories of resistance to actions of force. Should any Police Preferred Specification doorset include glazing, then this standard must also be met.