Maclennan

03/06/2026

Here’s another short video from Ian MacLennan. 𝗠𝘂𝗹𝘁𝗶 𝗹𝗲𝘃𝗲𝗹 𝗯𝗮𝘀𝗲𝗺𝗲𝗻𝘁𝘀 𝗱𝗲𝗺𝗮𝗻𝗱 𝘀𝗽𝗲𝗰𝗶𝗮𝗹𝗶𝘀𝘁 𝘄𝗮𝘁𝗲𝗿𝗽𝗿𝗼𝗼𝗳𝗶𝗻𝗴 𝗱𝗲𝘀𝗶𝗴𝗻, and it needs to happen before technical submission.
British Standards and the Building Safety Act both require it.

From 𝗯𝗲𝘀𝗽𝗼𝗸𝗲 𝗱𝗲𝘀𝗶𝗴𝗻 𝗮𝗻𝗱 𝟯𝗗 𝗱𝗲𝘁𝗮𝗶𝗹𝗶𝗻𝗴 to drainage strategy, serviceability between floors, and concrete bunds, there’s no room for standard details or assumptions.

We design basement waterproofing systems that mitigate risk from day one, all backed by £10m PI.

If you’re planning a basement, 𝗴𝗲𝘁 𝘁𝗵𝗲 𝘀𝗽𝗲𝗰𝗶𝗮𝗹𝗶𝘀𝘁 𝗶𝗻𝘃𝗼𝗹𝘃𝗲𝗱 𝗲𝗮𝗿𝗹𝘆 .
Call us on 0300 3200 241
𝘔𝘢𝘤𝘓𝘦𝘯𝘯𝘢𝘯 𝘵𝘢𝘬𝘦 𝘵𝘩𝘦 𝘳𝘪𝘴𝘬 𝘰𝘶𝘵 𝘰𝘧 𝘸𝘢𝘵𝘦𝘳𝘱𝘳𝘰𝘰𝘧𝘪𝘯𝘨

27/05/2026

𝗧𝗮𝗸𝗶𝗻𝗴 𝘁𝗵𝗲 𝗿𝗶𝘀𝗸 𝗼𝘂𝘁 𝗼𝗳 𝗯𝗮𝘀𝗲𝗺𝗲𝗻𝘁 𝘄𝗮𝘁𝗲𝗿𝗽𝗿𝗼𝗼𝗳𝗶𝗻𝗴 isn’t about guesswork, it’s about experience watch this short video where Ian MacLennan explains more.

We design over 1,000 basement waterproofing systems every year and install more than 200 ourselves. That hands on knowledge shapes everything we do.

Every system we install is fully inspected using our own purpose designed and manufactured inspection ports, allowing directional camera surveys and complete visibility around the basement.

𝗕𝘂𝗶𝗹𝗱𝗮𝗯𝗹𝗲. 𝗜𝗻𝘀𝗽𝗲𝗰𝘁𝗮𝗯𝗹𝗲. 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝗮𝗯𝗹𝗲.
Hundreds of basements installed each year. No leaks.
Call us today with your next project enquiry: 𝟬𝟯𝟬𝟬 𝟯𝟮𝟬𝟬 𝟮𝟰𝟬

𝘔𝘢𝘤𝘓𝘦𝘯𝘯𝘢𝘯 𝘵𝘢𝘬𝘦 𝘵𝘩𝘦 𝘳𝘪𝘴𝘬 𝘰𝘶𝘵 𝘰𝘧 𝘸𝘢𝘵𝘦𝘳𝘱𝘳𝘰𝘰𝘧𝘪𝘯𝘨

20/05/2026

🚧 What’s the #1 Waterproofing Challenge During Construction?... 𝗦𝗲𝗿𝘃𝗶𝗰𝗲 𝗘𝗻𝘁𝗿𝗶𝗲𝘀.

At 𝗠𝗮𝗰𝗟𝗲𝗻𝗻𝗮𝗻 𝗪𝗮𝘁𝗲𝗿𝗽𝗿𝗼𝗼𝗳𝗶𝗻𝗴, we take service penetrations seriously, because they’re one of the most common sources of water ingress in basement structures.
Almost every basement we work on includes service entries. In fact, it’s nearly impossible to build a basement without them. Yet, 𝗕𝗦 𝟴𝟭𝟬𝟮:𝟮𝟬𝟮𝟮 recommends designing them out at the earliest stage where possible. But how realistic is that in practice?

💡 𝗢𝘂𝗿 𝗔𝗽𝗽𝗿𝗼𝗮𝗰𝗵:
Rather than avoiding them, 𝘄𝗲 𝗱𝗲𝘀𝗶𝗴𝗻 𝘁𝗵𝗲𝗺 𝗶𝗻, confident in our systems, materials, and expertise. We use specialist gaskets and sealing systems that allow us to offer long-term guarantees that service entry points will remain dry.
Our waterproofing design specialists and trained technicians work together to ensure these critical details are handled right, from the start.

🛠️ 𝗔𝗹𝗿𝗲𝗮𝗱𝘆 𝗵𝗮𝘃𝗲 𝗶𝘀𝘀𝘂𝗲𝘀 𝘄𝗶𝘁𝗵 𝘀𝗲𝗿𝘃𝗶𝗰𝗲 𝗲𝗻𝘁𝗿𝗶𝗲𝘀?
We can often provide effective remedial solutions, even after construction has begun.

🔍 𝗞𝗲𝘆 𝘁𝗮𝗸𝗲𝗮𝘄𝗮𝘆:
If service entries aren’t properly designed during the technical design stage, they can become a major issue on site. That’s why early planning and the right systems make all the difference.
𝘔𝘢𝘤𝘓𝘦𝘯𝘯𝘢𝘯 𝘵𝘢𝘬𝘦 𝘵𝘩𝘦 𝘳𝘪𝘴𝘬 𝘰𝘶𝘵 𝘰𝘧 𝘸𝘢𝘵𝘦𝘳𝘱𝘳𝘰𝘰𝘧𝘪𝘯𝘨

16/05/2026

I hope your having a good Saturday. Mine has been bit of a grind.

16/05/2026

13/05/2026

𝗪𝗵𝘆 𝗖𝗵𝗼𝗼𝘀𝗲 𝗢𝘂𝗿 𝗣𝗼𝗹𝘆𝗠 𝗳𝗼𝗿 𝗬𝗼𝘂𝗿 𝗡𝗲𝘅𝘁 𝗣𝗿𝗼𝗷𝗲𝗰𝘁?
For architects and structural engineers, the right waterproofing system can make or break a project. Here’s why our PolyM is becoming the go‑to choice for decks and basements:

🔹 𝗙𝗮𝘀𝘁 & 𝗙𝗹𝗲𝘅𝗶𝗯𝗹𝗲 𝗜𝗻𝘀𝘁𝗮𝗹𝗹𝗮𝘁𝗶𝗼𝗻
PolyM installs quickly, performs brilliantly in damp or cold conditions, and helps minimise weather‑related site delays.
🔹 𝗜𝗻𝘀𝘁𝗮𝗹𝗹𝗲𝗱 𝗯𝘆 𝗘𝘅𝗽𝗲𝗿𝘁𝘀
Every application is carried out by hand by fully trained operatives, ensuring precision, consistency, and high‑quality workmanship.
🔹 𝗧𝗲𝘀𝘁𝗲𝗱 𝗳𝗼𝗿 𝗣𝗲𝗮𝗰𝗲 𝗼𝗳 𝗠𝗶𝗻𝗱
Once installed, PolyM can be checked using electrical defect‑finding equipment, so you know the system is performing exactly as it should.
🔹 𝗗𝘂𝗿𝗮𝗯𝗹𝗲 & 𝗛𝗶𝗴𝗵𝗹𝘆 𝗘𝗹𝗮𝘀𝘁𝗶𝗰
Designed to move with the structure, PolyM offers long‑term resilience and robust waterproofing performance.
🔹 𝗙𝘂𝗹𝗹𝘆 𝗦𝗲𝗮𝗺𝗹𝗲𝘀𝘀 𝗦𝘆𝘀𝘁𝗲𝗺
No joints. No weak points. A seamless application significantly reduces the risk of detailing failures.
🔹 𝗖𝗵𝗲𝗺𝗶𝗰𝗮𝗹 & 𝗚𝗮𝘀 𝗥𝗲𝘀𝗶𝘀𝘁𝗮𝗻𝘁
Ideal for demanding environments and sites requiring additional protection.
🔹 𝗕𝗮𝗰𝗸𝗲𝗱 𝗯𝘆 𝗕𝗕𝗔 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻
PolyM is fully BBA‑certified for waterproofing, giving you confidence in compliance and quality.

If you’re working on a deck or basement waterproofing project, our team is here to help:
📞 𝟬𝟯𝟬𝟬 𝟯𝟮𝟬𝟬 𝟮𝟰𝟬
𝘔𝘢𝘤𝘓𝘦𝘯𝘯𝘢𝘯 𝘵𝘢𝘬𝘦 𝘵𝘩𝘦 𝘳𝘪𝘴𝘬 𝘰𝘶𝘵 𝘰𝘧 𝘸𝘢𝘵𝘦𝘳𝘱𝘳𝘰𝘰𝘧𝘪𝘯𝘨

08/05/2026

We’ve recently been working in North Hampshire with on a 𝗹𝗮𝗿𝗴𝗲 𝗰𝗼𝗺𝗺𝗲𝗿𝗰𝗶𝗮𝗹 𝗯𝗮𝘀𝗲𝗺𝗲𝗻𝘁 project. A full cavity drain system has already been installed to create dry, usable space that will house a kitchen, laundry room, exercise room, and spa area.

We are now at the stage of applying our 𝗿𝗼𝗯𝘂𝘀𝘁 𝗣𝗼𝗹𝘆𝗠 𝗱𝗲𝗰𝗸 𝘄𝗮𝘁𝗲𝗿𝗽𝗿𝗼𝗼𝗳𝗶𝗻𝗴 𝘀𝘆𝘀𝘁𝗲𝗺 to the large deck area above the basement.

To keep the project progressing through cold and wet conditions, the client installed 𝗳𝘂𝗹𝗹 𝘁𝗲𝗺𝗽𝗼𝗿𝗮𝗿𝘆 𝗰𝗼𝘃𝗲𝗿 over the site. This has protected the works from the elements and allowed us to continue without delay.

With the new waterproofing system now complete, final finishes, whether grass, paving, or alternative surfaces, can be installed with confidence. The basement below is 𝗳𝘂𝗹𝗹𝘆 𝗽𝗿𝗼𝘁𝗲𝗰𝘁𝗲𝗱 𝗮𝗴𝗮𝗶𝗻𝘀𝘁 𝗳𝘂𝘁𝘂𝗿𝗲 𝘄𝗮𝘁𝗲𝗿 𝗶𝗻𝗴𝗿𝗲𝘀𝘀 from above.

𝘔𝘢𝘤𝘓𝘦𝘯𝘯𝘢𝘯 𝘵𝘢𝘬𝘦 𝘵𝘩𝘦 𝘳𝘪𝘴𝘬 𝘰𝘶𝘵 𝘰𝘧 𝘸𝘢𝘵𝘦𝘳𝘱𝘳𝘰𝘰𝘧𝘪𝘯𝘨

Call today with your basement project details: 📞 𝟬𝟯𝟬𝟬 𝟯𝟮𝟬𝟬 𝟮𝟰𝟬

06/05/2026

🚨 NEW CPD ALERT - Contractors Specification 🚨
MacLennan Waterproofing is now offering a 𝗽𝗿𝗮𝗰𝘁𝗶𝗰𝗮𝗹 𝗖𝗣𝗗 𝘀𝗲𝘀𝘀𝗶𝗼𝗻 designed specifically for 𝗺𝗮𝗶𝗻 𝗰𝗼𝗻𝘁𝗿𝗮𝗰𝘁𝗼𝗿𝘀 𝗮𝗻𝗱 𝗽𝗿𝗼𝗷𝗲𝗰𝘁 𝗺𝗮𝗻𝗮𝗴𝗲𝗿𝘀, focused on reducing risk, improving delivery, and protecting your project.

𝗧𝗵𝗶𝘀 𝗖𝗣𝗗 𝗰𝗼𝘃𝗲𝗿𝘀:
🔹 Compliance requirements
🔹 Waterproofing decisions and liability
🔹 Design team expectations
🔹 Risk assessment
🔹 Repairability, buildability, continuity
🔹 Waterproofing grades and system types
🔹 Common issues and failures
🔹 Sequencing and coordination
🔹 Communication between designers, contractors, and installers
🔹 Site preparation and environmental considerations
🔹 Critical detailing
🔹 Guarantees, what they actually cover and what they don’t

This CPD is 𝘁𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹𝗹𝘆 𝗳𝗼𝗰𝘂𝘀𝗲𝗱, and grounded in real project experience, giving you the tools to ask the right questions, manage interfaces, and avoid costly mistakes.

If you’re responsible for delivering basements, this session is for you.
📩 Get in touch to book a CPD: 𝗲𝗻𝗾𝘂𝗶𝗿𝗶𝗲𝘀@𝗺𝗮𝗰𝗹𝗲𝗻𝗻𝗮𝗻𝘂𝗸.𝗰𝗼𝗺
📞 𝟬𝟯𝟯𝟬 𝟯𝟮𝟬𝟬 𝟮𝟰𝟬
💻 https://maclennanwaterproofing.co.uk/technical/cpd-seminars/cpd-booking/

𝘔𝘢𝘤𝘓𝘦𝘯𝘯𝘢𝘯 𝘵𝘢𝘬𝘦 𝘵𝘩𝘦 𝘳𝘪𝘴𝘬 𝘰𝘶𝘵 𝘰𝘧 𝘸𝘢𝘵𝘦𝘳𝘱𝘳𝘰𝘰𝘧𝘪𝘯𝘨

04/05/2026

On site in the 𝗛𝗮𝗺𝗽𝘀𝗵𝗶𝗿𝗲 𝗰𝗼𝘂𝗻𝘁𝗿𝘆𝘀𝗶𝗱𝗲, delivering a design‑led, 𝗕𝗦𝟴𝟭𝟬𝟮‑𝗰𝗼𝗺𝗽𝗹𝗶𝗮𝗻𝘁 𝘄𝗮𝘁𝗲𝗿𝗽𝗿𝗼𝗼𝗳𝗶𝗻𝗴 𝘀𝗼𝗹𝘂𝘁𝗶𝗼𝗻 for a new‑build property with three distinct basement areas.

The scheme includes a cinema, wine cellar and standalone swimming pool basement, each protected using a tailored combination of 𝗧𝘆𝗽𝗲 𝗔 crystal coat and 𝗧𝘆𝗽𝗲 𝗖 cavity drain systems, designed collaboratively from an early stage.

A 𝗳𝘂𝘁𝘂𝗿𝗲‑𝗿𝗲𝗮𝗱𝘆 𝗿𝗮𝗱𝗼𝗻 𝘀𝘁𝗿𝗮𝘁𝗲𝗴𝘆 has been integrated throughout, with vented sump connections allowing simple activation via inline fans if ever required. Lightwells and retaining wall interfaces are detailed with cementitious waterproofing to ensure full continuity.

Early specialist input remains key to delivering 𝗿𝗼𝗯𝘂𝘀𝘁, 𝗰𝗼𝗺𝗽𝗹𝗶𝗮𝗻𝘁 𝗮𝗻𝗱 𝗺𝗮𝗶𝗻𝘁𝗮𝗶𝗻𝗮𝗯𝗹𝗲 basement environments.

Why not sign up for our 𝗰𝗼𝗺𝗽𝗹𝗶𝗺𝗲𝗻𝘁𝗮𝗿𝘆 𝗖𝗣𝗗 which covers everything you need to know to design and build a basement with waterproofing in mind: https://maclennanwaterproofing.co.uk/technical/cpd-seminars/cpd-booking/

𝘔𝘢𝘤𝘓𝘦𝘯𝘯𝘢𝘯 𝘵𝘢𝘬𝘦 𝘵𝘩𝘦 𝘳𝘪𝘴𝘬 𝘰𝘶𝘵 𝘰𝘧 𝘸𝘢𝘵𝘦𝘳𝘱𝘳𝘰𝘰𝘧𝘪𝘯𝘨