Newton Waterproofing Systems

01/09/2026

Why does primer matter when applying a cementitious waterproofing membrane?

The performance of a cementitious waterproofing system can depend heavily on the condition and preparation of the substrate.

Before applying cement-based, Type A waterproofing membranes, HydroCoat 903 Primer is used to help prepare the surface and promote adhesion between the substrate and the subsequent cementitious coating.

Good substrate preparation helps to:
- Improve adhesion of the waterproofing membrane
- Reduce the risk of poor bonding or delamination
- Create a more consistent surface for application
- Support the long-term performance of the waterproofing system

As shown in the installation photo, the substrate should be appropriately prepared, clean and free from contaminants that could affect adhesion.

The primer isn't an 'extra step', it's part of preparing the substrate for the waterproofing system to perform as intended.

Thanks to Harris Calnan for the installation photo from their recent project!

Find out more about HydroCoat 903 Primer and its application within cementitious waterproofing systems: https://www.newtonwaterproofing.co.uk/products-systems/products/primers-preparation-reinforcement/primer-for-cementitious-waterproof-membranes/

01/09/2026

We would like to say well done to Rafal, based in our Cornwall area, who are now qualified installer for PolyMaxx HA with Newton Waterproofing. Newton Waterproofing

Congratulations Rafal on this achievement. Rafal Lysiak

27/08/2026

Cavity drain waterproofing can be one of the most failsafe and reliable solutions for delivering a completely dry below-ground space during a basement refurbishment.

Perfectly demonstrated by specialist contractor Maclennan, who are installing the CDM system in an existing basement in Devon.

The client, wanting to refurbish their basement, requested a full survey and expert advice on the most suitable waterproofing solution to bring the space up to current standards and to comply with building regulations.

Whilst the space was previously 'waterproofed' by another company in 2010, no drawings, documents, or guarantees were available. The original channels were also in the wrong place, and the pumps used were insufficient for the job.

MacLennan's experienced team are now completely reinstalling the system up to their own high standards, fully guaranteed and covered by their £10 million PI insurance, providing the client with complete peace of mind.

26/08/2026

How do we know which injection resin to select for a project?

Injection resins provide a durable solution for stopping water ingress through cracks, construction joints or other defects in below-ground concrete.

But selecting the correct injection resin for the task is crucial to this process.

The right resin depends on several factors:
> The severity and volume of water ingress
> Whether the crack or joint is static or subject to movement
> The size and depth of the defect
> The condition of the surrounding concrete
> Environmental conditions, including temperature and chemical exposure

So what options are available to us?

Injection resins can be broadly divided into three categories:
1️⃣ Leak stemming – High-foaming resins that react quickly with water to stem and control high volumes of water ingress.

2️⃣ Leak sealing – Low-viscosity, non-foaming resins designed to pe*****te deeper into cracks, joints and voids to create a more permanent seal.

3️⃣ Hybrid – Resins that combine the properties of both, allowing them to stem water flow while also penetrating into the defect to provide a longer-term seal.

In some applications, more than one resin may be required. For example, a high-foaming polyurethane resin can initially be used to control an active leak, followed by a low-viscosity resin to complete the permanent seal.

This is why resin selection should be based on the specific conditions of the defect, rather than simply choosing a resin based on the presence of water.

Correct material selection, preparation and application are all essential to achieving a successful injection repair.

For more guidance, read the full article: https://www.newtonwaterproofing.co.uk/help-advice/injection-resin-for-your-project/

25/08/2026

Why use an injection hose to seal construction joints in a Type B waterproofing system?

Construction joints are one of the areas of a concrete structure where water ingress is a higher risk. Even when concrete is designed and placed correctly, cracks, capillaries, pores and areas of honeycombing can provide potential pathways for water.

This is where an injection hose system can provide an additional level of protection.

HydroTank 302 Injection Hose is installed within the construction joint before the adjoining section of concrete is placed, with injection ports and pipes secured within the steel rebar.

Once the concrete structure is poured and cured, the hose is injected with a specialist water sealing injection resin under pressure. The pressure causes the resin to push out of micro-ports all over the injection hose, filling and sealing any cracks, capillaries, pores and areas of honeycombing around the construction joint. This makes it ideal for:

> Construction joints in earth-retaining and water-retaining structures
> Concrete walls, rafts and slabs
> Slab-to-wall interfaces
> Post-construction joint sealing
> Areas where poorly compacted concrete has created voids around construction joints

The result? A Type B waterproofing solution designed to seal the full construction joint, rather than simply protecting a small area in the centre of the joint.

Understanding how different joint sealing methods work is an important part of correctly designing and specifying below-ground waterproofing systems.

Find out more about the HydroTank 302 Injection Hose: https://www.newtonwaterproofing.co.uk/products-systems/products/concrete-joint-and-leak-sealing/resin-injection-hose-waterbar/

24/08/2026

Looking for a RIBA approved waterproofing CPD?

‘Specifying Pumping Systems for Below-Ground Waterproofing Projects’ is just one of our CPD seminars, approved by the Royal Institute of British Architects, helping specifiers to build their understanding of an often-overlooked element of waterproofing.

Book a free virtual or in-person session with our technical experts for practical guidance on the specification, design and integration of pumping systems for below-ground waterproofing projects.

The session covers:
> Key considerations when specifying below-ground pump systems
> How different pump types operate and where they are best suited
> The role of sump pumps within Type C waterproofing systems
> Pump maintenance and essential considerations for long-term performance
> Common risks associated with below-ground pump installations, and how correct design can help mitigate them

Pumps are a critical component of a Type C waterproofing system, so understanding how they are specified is essential to achieving a robust and maintainable solution.

The CPD is a valuable addition to your professional development.

If you're involved in the design or specification of below-ground waterproofing, click here for more information: https://www.newtonwaterproofing.co.uk/continual-professional-development/

20/08/2026

Check out this project... application of HydroCoat 103 2K, HydroCoat 107 Elastic 2K, and HydroCoat 903, with the Newton CDM System about to be installed by Harris Calnan.

HydroCoat 103 2K is a high-performance cementitious waterproof coating, which has been sprayed on the walls and brushed onto the slab of this project.

Fillets have also been installed at the wall/floor junction, with a coat of HydroCoat 107 Elastic 2K for added protection.

Lastly, the Newton CDM System will be installed, providing a comprehensive, maintainable solution for future water ingress.

20/08/2026

Balcony Waterproofing and Fireproofing - London

As part of the Wandsworth regeneration programme to increase the number of affordable homes, Wates Residential were awarded the contract to build a new, six-storey block of apartments on Shuttleworth Road.

The structure included 59 concrete balconies, all requiring waterproofing with a product with a minimum fire rating of A2-s1-d0, tested to BS EN 13501-1.

On site, Newton Specialist Contractor Arti Structural Waterproofing Ltd used multiple Newton products to create smoothing fillets, reinforce other products, all while working flexibly to deliver the project over two stages.

Thanks to a meticulous eye for detail, as well as careful planning and thorough preparation of the concrete balconies, Arti were able to complete the waterproofing of all 59 balconies in two stages. The team managed this while delivering the required A2‑s1‑d0 fire rating and completed the installation quickly without compromising the build programme.

Read the full case study: https://www.newtonwaterproofing.co.uk/case-studies/deck-balcony-waterproofing/balcony-waterproofing-and-fireproofing-london/

18/08/2026

The Newton Cloud - Our groundbreaking and unique cloud-based pump monitoring system.

Recently shortlisted for three innovation awards in 2026, the platform actively monitors basement pump systems in real-time, delivering instant alerts for critical events via the Newton Cloud App.

The integrated system combines our cloud-connected hardware with the online platform to provide contractors and clients with complete oversight and control of their pump systems.

The system can be used to bring state-of-the-art intelligence to both new and existing pump installations, delivering a convenient monitoring platform for service engineers and minimising costly and unnecessary site visits.

Watch our video to learn more about The Newton Cloud: https://www.youtube.com/watch?v=zXRnx66kneU

Introducing a groundbreaking new range of cloud-based pump monitori...

17/08/2026

It's always fantastic to hear when one of our specialist contractors is appointed through client recommendations.

On this project, the Maclennan team were proud to be chosen to design and install the waterproofing for a new-build property featuring a single-storey basement.

After reviewing the drawings and site information, MacLennan's CSSW-qualified surveyor developed a BS 8102:2022 compliant strategy, incorporating two forms of protection:

1️⃣ Type A - HydroCoat 104 Super: crystalline cementitious waterproofing that pe*****tes the concrete and protects against moisture movement through capillaries and hairline cracks.

2️⃣ Type C - our CDM System: a comprehensive cavity drain waterproofing solution with a bespoke engineered sump and pump system.

The combined approach is a practical solution to provide resilience and long-term protection for habitable basement spaces.

Great work again from the MacLennan team 💪