Cavity Drain Systems

Cavity drain systems provide a comprehensive waterproofing solution in Brighton. This system works by creating an air gap between the external face of the walls and any internal finishes, collecting water that penetrates the outer wall, and transferring it to a suitable drainage point.

Cavity Drain Systems (also known as Tanking) offer a highly effective way of waterproofing buildings throughout Brighton. The system creates an air gap between the exterior surface of walls and interior finishes, trapping moisture which has penetrated through from outside before it reaches vulnerable surfaces inside. All collected water is then transferred to a suitable drainage point for removal.

At Brighton Damp Treatments, we offer a range of cavity drain systems for basement and cellar waterproofing. Our experienced surveying team can provide a variety of practical solutions for both new builds and existing properties, from cavity drainage membranes to external tanking systems. We take great pride in delivering quality services that meet the needs of our customers.

There are several common types of dampness, all caused by different factors. Rising Damp is when moisture rises up through the walls of a building due to capillary action and can usually be found in older buildings that do not have adequate damp proof membranes installed. Penetrating Damp is when water enters the fabric of a structure from external sources such as rainwater or plumbing leaks and can occur in both old and new buildings. Condensation occurs when warm air meets cold surfaces, creating moisture droplets on windows, walls and ceilings which can lead to mould growth if left untreated.

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Common Types Of Damp And Their Causes

It’s important to understand that there are various forms of dampness which are all caused by different circumstances. One type is known as ‘Rising Damp’ – this occurs when moisture ascends through the walls of an establishment due to capillarity, with it typically being more prevalent in older properties without suitable damp-proof membranes installed.

Rising Damp

Rising damp is a common problem in older buildings. It’s caused by moisture travelling up through porous building materials, such as brick and mortar. The effects of rising damp can be serious; it can cause structural damage to the property and create an unhealthy environment for its inhabitants.

Penetrating Damp

Penetrating damp is a common issue that affects many older buildings. It occurs when water penetrates the walls of your home, resulting in a build-up of moisture and humidity inside the property. This can cause significant damage to plasterwork, furniture, flooring and other decorative features as well as potentially leading to health problems such as respiratory conditions or allergies.


When warm air cools, it releases its moisture as water droplets – a process known as condensation. This typically occurs when humid air comes into contact with a cooler surface, such as windows or walls. As temperatures drop, more and more water vapour turns into liquid, eventually forming visible droplets on the cold surface.

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What’s The Purpose Of A Cavity Drain System?

Cavity drainage systems are an effective way to protect buildings from water damage. These systems use specially designed membranes which are built into the walls of a structure and act as barriers, keeping unwanted moisture out while allowing any existing moisture to escape..

A cavity drain membrane can protect your house from serious damage due to excessive moisture by providing a physical barrier between the external walls and the interior of the building. To ensure it is installed correctly, follow these steps:

1. Begin by clearing any debris or vegetation away from around the perimeter of the area that you are going to install the membrane on; this will create a clean and safe working environment.

2. Apply self-adhesive waterproofing tape along all vertical wall junctions before attaching your membrane onto them – this helps prevent against any water penetration through small gaps which could occur over time.

3. Securely fix your cavity drain membrane into place with galvanised nails at close intervals – make sure they go deep enough into masonry so as not to pull out over time because of expansion and contraction due to temperature changes or potential wind pressure or movement in foundations.

4. Finally, check all joints are properly sealed using mastic sealant (or similar). This will help keep unwanted moisture and air out while allowing trapped moisture inside walls to escape safely outside without causing dampness issues indoors.

Installing cavity drain membranes is an essential component for safeguarding homes against water damage, so it’s vital that they’re done right! Follow these steps for successful installation:

1. Start by removing any vegetation and debris around where you plan on applying the membrane; making sure there’s nothing obstructing its placement ensures safety during installation process as well as creating a neat finish afterwards.

2. Before fixing down the material itself, apply self-adhesive waterproofing tape along each vertical wall junction – this extra layer of protection prevents water seeping through tiny cracks which may arise overtime due to fluctuations in temperatures or other pressures such as wind force impacting structural foundations over time .

3. Fasten firmly using galvanised nails every few centimetres throughout – bear in mind that securing deeply into masonry stops them becoming loose when foundation materials swell/contract under changing conditions such as extreme weathers etc..

4. Lastly , seal off all seams with specialised mastic sealant (or equivalent). This helps maintain humidity levels within internal walls whilst permitting excess moisture present inside brickwork surfaces evaporate outdoors with minimal risk of rising damp occurring internally i n living spaces .

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Benefits Of Cavity Drainage Systems For Waterproofing

Cavity drainage systems provide an efficient means for waterproofing buildings. By installing a membrane along the external perimeter of the building and filling any gaps with a water-resistant material, these systems offer swift installation with minimal disruption to existing services or structures. Furthermore, they ensure superior protection from incoming moisture as well as defending against damage caused by dampness in walls and ceilings. Moreover, when considering costs associated with different waterproofing options currently available on the market, this solution proves highly cost-effective too!

Whatever type of waterproofing is applied to an existing basement, it must be able to cope with any pressure from ground water, and the product should have been independently certified by either the British Board of Agreement (BBA) or a similar technical body.

This waterproofing design is compliant with British Standard 8102:2009 which sets out a ‘Code of Practice for Protection of Below Ground Structures Against Water from the Ground’, and it is straightforward to maintain in the long term. Once the framework for the Type C system is in place, a cavity drain membrane should be installed, extending to any vaulted spaces and walkways within recesses.

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The end of wet and musty underground areas

The damp, mouldy odours found in subterranean spaces are a thing of the past. Advances in technology can now guarantee that these dark and unpleasant environments remain dry, safe and free from any unwelcome scents.

With new solutions available to combat humidity and moisture, even in the most difficult-to-reach places, there’s no need to put up with muggy underground areas anymore. These cutting-edge systems provide an effective way to maintain good air quality without compromising on aesthetics or comfort – so you can enjoy your time down below without worrying about the smell!

Basement conversions provide an excellent opportunity to extend your living space and make use of what was once a dark, damp cellar. This is a fantastic way to gain much needed room without having to move house! Transforming damp basements or other subterranean areas into dry and comfortable rooms can be an economical and rewarding way to enlarge the home or optimise current living spaces.

At Brighton Damp Treatments, we are highly experienced in waterproofing existing basement rooms, ensuring the successful installation of new structures and converting damp, underutilised spaces into dry living areas. Our techniques guarantee a quality finish so that you can enjoy your newly transformed space with peace of mind.

Cavity drain systems are a cost-effective way of waterproofing your property. By creating an internal drainage system, water can be diverted away from the walls and foundations to help protect them against damage caused by damp or flooding. The initial installation costs of cavity drain systems may seem expensive but in the long run they represent great value for money as they will protect your home from costly repairs due to water damage.

Installing a cavity drain system is an effective and affordable means of waterproofing your home, diverting moisture away from walls and foundations that could otherwise cause costly repair work due to damp or flooding. Although the upfront cost may appear high at first glance, these systems provide excellent value for money over time by helping to avoid any potential structural damage resulting from excessive levels of moisture in the building fabric.

Why Opt for Brighton Damp Solutions?

Are you dealing with damp issues in your property? If so, look no further than Brighton Damp Treatments – the perfect solution for tackling damp-related problems. Our experienced team of experts can provide an extensive range of services to help you get rid of any moisture-related concerns. We are proud to offer a comprehensive and tailored approach that is designed to suit all budgets and needs. With our effective treatments, we guarantee lasting results that will ensure your home remains safe and dry for many years to come! Brighton Damp Treatments is dedicated to delivering the highest quality of services for damp proofing treatments, re-plastering, wood preservation and damp assessments. We strive to ensure that all our work is carried out in accordance with industry standards and we are fully insured for your peace of mind.

Areas We Cover

  • Aldrington
  • Bear Road
  • Bevendean
  • Black Rock
  • Brunswick
  • Carlton Hill
  • Coldean
  • Elm Grove
  • Hangleton
  • Hanover
  • Hollingbury
  • Hollingdean
  • Kemp Town
  • Kemptown
  • Mile Oak
  • Montpelier
  • Moulsecoomb
  • New England Quarter
  • North Laine
  • Old Steine
  • Old Steine Gardens
  • Ovingdean
  • Patcham
  • Portslade
  • Preston Village
  • Prestonville
  • Roedean
  • Rottingdean
  • Round Hill
  • Saltdean
  • Seven Dials
  • Stanmer
  • The Lanes
  • West Blatchington
  • West Hill
  • Westdene
  • Whitehawk
  • Withdean
  • Woodingdean

Types of Damp and Their Causes

Increasing Humidity Levels

Rising damp is a common source of moisture that affects building walls. Capillary action draws groundwater up through microscopic channels in the bricks, similar to straws. This water carries salts which also move up the wall.

Investigating Penetrating Damp

Penetrating damp, commonly referred to as “rain penetration,” occurs when an excessive amount of water penetrates a home through its external walls. This can happen due to flaws in the roof tiles, broken pointing, blocked weep holes or faulty seals on the walls, roofs, windows or door surrounds at any level of the property.

Reducing Moisture Through Condensation

When warm air meets cold surfaces or has excessive moisture in the house, condensation occurs. This is especially noticeable during winter when your central heating system comes on in the cool mornings and evenings.

What is the Purpose of a Cavity Drain System?

A cavity drain system is a waterproofing solution featuring a cuspated membrane applied to walls and floors, accompanied by a channel at the wall/floor junction. Any moisture penetrating the barrier flows down into the slab and through to the perimeter track, which guides it to a sump pump below.

Installing a Cavity Drain Membrane

Installing a cavity drain membrane requires meticulous attention to detail, as well as specialised skills and techniques. It is best carried out by professionals.

A generic description can be presented as a series of steps:

  • Decide on which wall or floor to work on.
  • Carefully remove the skirting board.
  • Carefully take away the plaster and replace it with stone, brick or blockwork.
  • Drill holes and inject a damp-proof course cream into the exterior ground level.
  • Apply a primer-sealer coat to the wall.
  • Secure the membrane to the wall with care.

Brighton Damp Treatments offers a comprehensive design and installation service for basement structural waterproofing per British Standard BS8102, categorised as “protection of structures from groundwater.”

We use polyurethane plastic sheets with dimples formed in them for cavity drain membrane systems. These are mechanically fastened to the walls, forming a hollow between the substrate and interior wall plaster finish. This allows any water entering to be collected and drained from the property; sump and pump systems can be installed in the floor structure if needed. To improve the UV value of walls, insulation-backed plasterboard can be applied over Brighton Damp Treatments’ cavity drain membrane system if needed. This system was designed by their skilled surveyors and meets Property Care Association standards. The same guarantees that apply to other systems from Brighton Damp Treatments also apply here.

The Benefits of Cavity Drainage Systems for Waterproofing

Whatever kind of waterproofing is used to retrofit a basement, it must be capable of resisting groundwater pressure, and the product should have certification from the British Board of Agreement (BBA) or similar independent technical body.

The waterproofing design complies with British Standard 8102:2009’s ‘Code of Practice for Protection of Below Ground Structures Against Water from the Ground’, and is effortless to maintain in the long run. Once the structure is ready to accommodate the Type C system, a cavity drain membrane should be installed, covering all vaulted areas and walkways.

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