Waterproofing standard BS8102 has been revised and the new standard from 2022 has been published this month.
Our MD Ian MacLennan says “We had to change the standards because of the confusion around the grades of waterproofing. We ended up doing a complete revision and added a lot of new best practice guidance. Because the changes are critical and extensive we will provide ongoing support and advice to clients to keep them compliant. Including CPD and training."
As these are our notes, we encourage you to read the standard for yourself and compare, but overall we feel that what we have written will benefit anyone involved in basement waterproofing design.
Just some of the changes to be aware of are:
1. It is now written into the British standard that you need to appoint a waterproofing specialist that is adequately qualified and experienced for that type and size of project and by the technical design stage latest if RIBA stages are being used.
“We would add that they must have PI for waterproofing design, and accept design liability.”
2. Defects owing to design are now mentioned in the British standard.
“You need the qualified, experienced designer from beginning to end to prevent defects .“
3. Twin walls and ICF are now classified as inherently high risk according to the British standard.
4. (If remedial work isn’t possible, the design should be altered.)
“You have to consider the form and feasibility of repair with the design specialist.”
5. The standard says the specialist must have the adequate relevant insurance.
“This is incredibly important, waterproofing specialists taking the liability is critical, no split liability can only protect the client and design team.”
6. Movement joints should not be used below ground unless unavoidable.
“If they absolutely have to be used we can design them but there is lots of advice in the standard. “
7. There is a completely new section on historic buildings.
"We are running a CPD on historic building basement design and compliance with BS8102 2022."
8. A lot of new critical and useful information on Cavity Drain systems.
9. Inverted cavity drain systems. A high-risk scenario in which a specialist is required, IS now written into the standards.
10. A huge section detailing what happens if something goes wrong and remedial works are required. Important information for those considering a less effective waterproofing solution to save costs.
If you want to find out more from an author of the new standard contact us.
We are also offering a free CPD seminar that goes through the new BS8102 : 2002 step by step, book it here.