Smoke leakage testing

Smoke leakage testing is used to test door and shutter assemblies and determines smoke leakage at ambient and elevated temperatures (200oC). Smoke leakage testing  explores the rate of leakage of cold air and hot gases from one side of a door and shutter assembly to the other, representing the passage of smoke during a fire

Why do I need smoke leakage testing?

Doors are an essential part of all buildings and due to developing and changing legislation are increasingly put under pressure to perform many different functions within a structure. Ensuring the right level of performance of your doorset within a structure is an integral part of building a safe space. Smoke leakage performance in many cases is an essential part in the design of buildings and will influence how a fire strategy may be developed. A fire door that halts the spread of flame yet allows the passage of smoke may be considered inappropriate in many  circumstances.

Increasingly, countries now specify that there must be provision for doors to provide smoke control. In the UK, currently the requirement relates only to cold or ambient smoke. However, many of the doors which require smoke control performance are also required to have a fire resisting capability and will therefore include intumescent seals which, when subjected to the elevated temperatures of a fire, will expand and seal the door within its frame ensuring the compartment line is not breached.

Smoke leakage test evidence is also necessary if you wish to UKNI / UKCA/ CE mark your door product to achieve a Sa or S200 classification in accordance with EN 13501-2.

What to expect from smoke leakage testing

In order to evaluate smoke leakage at ambient temperatures, the test is conducted using a specially designed smoke leakage chamber, housing a partition to install the sample. The chamber utilises fans to control the pressure exerted and includes a pressure transducer, a flow meter and digital displays to record pressure and leakage rates throughout the test. Leakage over the perimeter length of the opening element is used to determine the results. It is possible to evaluate both positive and negative pressures at ambient temperature. This can be done by simply reversing the chamber control fan's polarity to demonstrate leakage rates at ambient temperatures from both directions; leakage readings are taken at various pressures depending on the test standard.

Warringtonfire smoke leakage testing services

Warringtonfire can offer smoke leakage testing to EN 1634 Part 3 and BS 476: Part 31.1. We have excellent smoke leakage testing facilities and can perform the tests from our UKAS accredited laboratory in High Wycombe and our BELAC accredited laboratory in Gent.

Our facilities include a 3m x 3m rig which includes a partition for supporting the sample, the fans are powered by a purpose built control panel, while pressure transducers and flow meters provide a digital read out of the pressure and leakage rates. 

Smoke leakage testing by itself or as a package


Smoke Leakage Testing


Warringtonfire High Wycombe can offer tri-service smoke leakage testing for fire resistance, acoustic and smoke control testing, saving you time and money.

This package can be offered on one contract, one site, with one project manager and one sample.

You will benefit from reduced costs across the board, enabling overall efficiency in addition to convenient access to our team of engaged experts.

All three tests can be booked individually or as a package deal. The three tests can be performed on the same sample within two days, or multiple samples can be tested over one day.

'Reverse engineer' your doorset testing process with Warringtonfire

Test reports contain the technical specification of the product tested and detail the results obtained on the day of the test.

In some cases, to achieve the desired design range for a product it can be a challenge to establish a suitable selection of test specimens. Warringtonfire’s experienced technical experts may be one way of achieving the desired scope of application for your doorset design. Warringtonfire offer ‘Reverse Engineering’ of a product family to design a suitable test programme to achieve your objectives, in an efficient manner to ensure the testing conducted is essential to achieving your overall goal.

Test reports provide no opinion on the ability to perform any modification to the tested element. Warringtonfire can provide assessed extensions to the tested specification which will not detract from the overall performance of the doorset design under test conditions, in the form of a Field of Application. Field of Applications are an assessment of the performance of a tested specification to a named test standard with various modifications made which are explored and justified within the content of the Field of application.

For more information or to book your smoke leakage testing with Warringtonfire, please contact one of the laboratories below.

Warringtonfire has test laboratories and certification bodies across the EU and UK, we have solutions to act as:

  • A Notified Body to support your testing and certification requirements for the CE marking of your products for use in the EU and NI. 
  • An Approved/Notified body (NI) to support your testing and certification needs for UKCA marking in the GB market, and CE+UK(NI) marking for the NI market.

Please note that since Brexit, Warringtonfire’s notified body status has moved to our sister company, Element Materials Technology Rotterdam B.V.(ERO) in the Netherlands; meaning that we are still, as a company, able to fulfil your notified body role.

Following the post-Brexit trade agreement, please contact one of our engaged experts to discuss your test, certification and market requirements such that we can offer a cost effective solution. Note that it is highly likely that the current acceptance of CE marked products in Great Britain will end on 30 June 2025, even so, it is critical you contact us in good time to ensure you are prepared for UKCA marking.