Introducing MacLennan.


MacLennan have been guaranteeing work for over 30 years in London and across the UK. We have built up a reputation for supplying an honest and professional service.



Ian MacLennan

“I am regarded in the industry as one of the foremost experts on waterproofing systems design and installation. I have acted as a consultant and contractor on some of the country’s largest and most technically challenging waterproofing contracts such as Wembley Stadium, the Olympics, Frankley Water Reservoir, The Houses of Parliament, Kia Oval and many more multi million pound projects and historic buildings.

As the managing director of MacLennan, I oversee the design of over 1000 basement and deck waterproofing projects per annum and have trained numerous surveyors to pass CSSW in waterproofing design. As of this time I am currently engaged in re writing the British Standard for waterproofing of below ground structures BS8102.

I was a co author of the PCA, Structural Waterproofing Group codes of practice for waterproofing. As a PCA registered waterproofing design specialist I complete more than 40 hours CPD per annum. I have been a surveyor for 30 years and a Managing Director for 21 years.

For the last 15 years I have lectured to architects, engineers and main contractors and presented on the subject of Structural waterproofing design. How to avoid split liability and responsibility. My lectures are RIBA approved.”



Linda MacLennan

Linda has been coordinating and managing basement waterproofing and preservation contracts with Ian since the companies creation.

Linda is totally customer service driven and will always accommodate client and contract time scales.



Yogi MacLennan

Yogi is taking up the reigns of site security at MacLennan, he was found unsuitable for a customer interfacing role due to a surly nature.

He is only a young lad but is already demonstrating a natural ability to guard. He has a happy disposition towards employees and family but is wary of visitors.

Get in touch with our technical team today!

Technical Team

martin belleington-mills Business Development Manager

Martin Bellingham-Mills

DIRECTOR / Technical

As part of the technical sales department it Martins role to help the end Client, Architect or Main Contractor get the most out of our specialist teams extensive knowledge and experience.

By being there at each stage of the project to help detail the key advantages and specific detailing of the proposals, making sure the real value for each element is explained in person to help simplify the quotation in conjunction with our design drawings.

ian scroggins

Ian Scoggins

CSSW / Senior Surveyor

Ian has worked with Ian MacLennan for nearly 17 years. Ian is experienced in all forms of waterproofing, building construction, and heads up the technical department of MacLennan.

Ian is CAD certified, designing waterproofing systems, and overseeing site supervision, design meetings with architects and engineers, research and development of our products.


Simon Riches 


“I have 17 years’ experience working within the waterproofing industry having entered as an operative since leaving school. I spent 10 years gaining experience of the installation of various waterproofing systems and developing my knowledge of products, site conditions and both domestic and commercial client requirements prior to obtaining my official CSSW qualification through the Property Care Association in 2017. Since then, I was employed as a fully qualified waterproofing surveyor for a company covering Greater London and the South West of England. I joined MacLennan in December 2018 where I have undergone additional in-house training on top of my official qualification. I have been responsible for the design of waterproofing systems on over 600 projects and overseeing the installation on almost 100 projects in Greater London and the South East of England.”


David Keffen


"I have worked in the construction industry for over 25 years. Having worked in various roles over the years including Interior Designer, Site manager, PM, and QS, I have a wide range of experience to draw from. When I joined Maclennan I enjoyed an intensive training programme from the foremost experts in the business, extending my knowledge of how to design a successful waterproofing system. At Maclennan I have worked as a surveyor and Technical Manager. Within my role, I have helped waterproofing manufacturers design their waterproofing systems and improve their typical details.

As a qualified CSSW structural waterproofing Surveyor I have been privileged to design basement waterproofing for some of the largest and most challenging construction projects in the UK“.


Charlie Davies 


"After leaving school I undertook a Civil Engineering apprenticceship where I gained knowledge of different aspects of the construction industry, mainly focusing on design using programmes such as AutoCAD. Following this I joined MacLennan in January 2021 as a Junior Estimator/Surveyor. From this point onwards I undertook extensive in-house training alongside training towards my CSSW qualification with the Property Care Association. I am still at the start of my waterproofing career and enjoy learning new aspects of the indusrty every day from broadening my general knowledge to assisting on site surveys and providing waterproofing design proposals to both domestic and commercial clients all over the south."


Joe Fulton

CSSW / Structural Waterproofing Supervisor 

"My role in the MacLennan technical team is as an on site Structural Waterproofing Supervisor. With over 17 years' experience in the waterproofing industry and as a valued member of the MacLennan team for over 4 years, I have an abundance of experience having also previously worked as a waterproofing technician for over 8 years with another company prior to joining MacLennan and a further 5 years as a competent plasterer carrying out damp proofing and plastering works. My knowledge and expertise are very diverse having not only been heavily involved in the installation of various waterproofing systems on some of the most prestigious projects in England, but also I am CSSW qualified, fully trained in quality management and in the process of obtaining an NVQ Level 2 in structural waterproofing and my IOSH qualification."

Why should I work with MacLennan?


We Design, supply and install. There's no split responsibility with MacLennan.


MacLennan live and breathe waterproofing, have a look at one of our free CPD seminars and find out!


MacLennan has the most comprehensive guarantees and insurances in the industry.

Safe Contractorx
Full 4th May 2010 06 22 42 Gpi Logo E1443710209909x
Safe 4 Sitex

Get in touch!

Ready to start a project or require more information about us?
Call us about your project or problem and we will be happy to help.

Call us today on:

0330 3200 240
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