Basement Waterproofing
As an independent company, we can choose the appropriate products to suit the large variety of properties we are called on to waterproof.
MacLennan design, supply, and install waterproofing systems across London and the rest of the UK that comply with BS8102 and all third party warranty provider's requirements.
We can save money and protect clients with expert basement waterproofing design.
The following pages will set out your options for combining systems for the type of basement construction you are considering.
To comply with British Standard BS8102/2022 and Third-party warranty providers you need to appoint a CSSW qualified waterproofing specialist onto the design team before technical design (RIBA 4).
This new requirement does not mean take advice from a designer, it does mean the CSSW expert has to be a design team appointment and have PI for the advice and design given from early design to completion of construction and waterproofing.
They must have suitable experience and be able to advise on all systems and options as well as buildability, repairability, sequencing, protection, hazards, CDM, MacLennan work with many of the market leading engineering and architecture practices in the UK to design best practice, best value guaranteed basement waterproofing solutions.

What are you looking to waterproof?
Historic Structures & Basement Conversions

A basement / cellar conversion under an existing property
Gas Proofing

Gas proof your basement to prevent Radon, Methane, Carbon Dioxide and any other ground gases.
Get in touch with our technical team today!
MacLennan have been experts in designing, installing, and guaranteeing systems for over 30 years.
Waterproofing systems designed and installed by MacLennan are covered by £10 million PI.
MacLennan work with main contractors and developers to deliver projects under the latest HSE regulations, on time and fully guaranteed using our own fully employed, experienced and qualified workforce of waterproofing technicians.
It's important that your waterproofing solution is BS8102 compliant. Read our BS8102 Guidance for Compliance.
In need of a specification for a project?
Upload your plans and a brief description of the project and a member of our team will get in touch!
Why should I work with MacLennan?
WE’RE INDEPENDENT
We Design, supply and install. There's no split responsibility with MacLennan.
WE’RE PASSIONATE
MacLennan live and breathe waterproofing, have a look at one of our free CPD seminars and find out!
WE’RE GUARANTEED
MacLennan has the most comprehensive guarantees and insurances in the industry.
Related Projects
We have been entrusted with significant contracts such as The Houses of Parliament, Kia Oval, Olympic Park Media Centre, Hilton Hotels, Barratt Homes Head offices and hundreds of high end residential properties.
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