Design of ground gas protection in new buildings
This one day course (delivered via 2 x Zoom sessions) is based around the requirements of BS8485 for new buildings. It would aim to dispel the myth that gas protection design is just adding up numbers of points and obtaining warranties from suppliers. This is a major cause of problems in the industry.
This course is fully booked. Please register your interest to attend the next scheduled date in 2023.
£300 + VAT (£360) full CIRIA member and LACL members
Who should attend
£350 + VAT (£420) Non members
The fees above cover both trainer led live online sessions.
SMEs staff must download a booking form to register
31 October - 1 November 2022
09.15 – 12.30 Zoom sessions daily.
Delegates must attend and complete BOTH sessions fully to gain 6hrs CPD.
Delegates are requested to log in 15 minutes prior to each session
Designing ground gas protection systems following the guidance in BS8485
is more than just adopting a Characteristic Situation and adding up
points. It requires a detailed justification for any gas membrane and
calculations for any underfloor ventilation system that is specified.
The points assigned to the floor construction should also be justified.
The design should be summarised and explained in design report and shown
on detailed site specific drawings for construction.
This training will explain in detail the factors to be considered and
how to complete the appropriate venting calculations. It will explain
the details to be included in a design report with reference to relevant
clauses in BS8485. The standard also recommends that the design report
should include the verification plan for the proposed system. The
course will also explain when Detailed Quantitative Risk Assessment
(DQRA) might be used in place of the simple empirical points system.
Anyone who procures, designs or approves gas protection systems. This
would include developers, contractors, consultants, NHBC and local
- Gain an overview of the contract for gas design, roles and responsibilities
- Understand BS8485 points system – where and when it can be used
- Learn design considerations for concrete floor slabs and basement walls for gas resistance and BS8485 points
- Explore design, detailing and specification of gas or VOC membranes –
how to assess durability, permeation of gases other than CH4 and CO2,
- Review gas detection systems – what are they for and critical factors eg detector head locations
- Explore design for future changes in gas regime
- Undertake Ventilation design calculations
- Understand the design report and verification plan
- Share experiences and knowledge with our expert trainers and other delegates
- Gain CPD
This course has a value of 6 hours towards your CPD. Certificates will be sent to delegates following completion.
This training will be delivered via Zoom sessions.
If you are unable to book online, please complete and return the booking form to Sarah Macpherson by email.
Notice for new bookings from EU/EEA customers only
CIRIA is currently unable to directly process your transaction
if you are purchasing from the EU/EEA region. If you wish to book this
training course please email your request to [email protected] in the first instance.
Terms and Conditions
Click here for details of our terms and conditions that will apply.
For further information on CIRIA membership and other services, please contact:
Email: [email protected]
Registration not available.