DELTA MEMBRANE SYSTEMS LTD
Suppliers of: Type C Waterproofing membranes, Basement/Below Ground Cavity Drainage Systems, Tanking Systems, Basement Tanking Membranes, Type A Waterproofing Systems, Type B Waterproofing Systems, Structural Waterproofing, Waterproofing Systems, Submersible Pumps, Fl
Delta Membrane Systems Limited is the leading Type C Cavity Drain Membrane manufacturer in the United Kingdom and the UK arm of Dörken Gmbh & Co KG, the world’s largest manufacturer of cavity drain membranes. Delta Membrane Systems Limited provides a full range of waterproofing and damp proofing solutions for architects, specifiers, developers, contractors and homeowners alike on new, retrofit and refurbishment construction and in flood resilience. We also supply ground gas protection membranes protecting structures from harmful ground gases such as radon, carbon dioxide, methane and hydrocarbons.
With over 125 years of manufacturing experience Delta is an impeccable partner on every project. Our skills have been mastered through experience in the waterproofing industry. Delta’s Technical Team will help from concept to completion. Our hands-on approach and knowledge are what sets us apart.
Installing a Delta Membrane System offers complete protection to structures from ground water ingress and contaminates. Our products comply with British Standard 8102:2009, 8485:2015+A1:2019 and 85500:2015 and are BBA certified.
Our nationwide network of Delta Registered Installers offers a fully guaranteed installation service.
Proudly supporting the Women of Waterproofing Networking Group to inspire, retain and attract females into the Waterproofing sector.
CAD Drawings available on our website or via FastrackCAD
Main Products & Applications:
Delta provides waterproofing products for all three types of waterproofing (Types A, B & C) as defined within BS 8102:2009.
Our ‘Type C’ Waterproofing Systems are a maintainable basement/below ground waterproofing solution for new-build basements, refurbishment and retrofit projects. The Type C System comprises of a Cavity Drain Membrane, Drainage system, Package Pump and Control System.
In principle a cavity drain membrane system allows moisture or running water to travel behind the membrane within a controlled drainage system. A cavity drain system requires minimal preparation and disturbance to an existing substrate.
In various formats podium decks have been around for many years, however they are becoming more widely used on top of basement constructions as either paved areas, gardens or terraces. A podium deck is a structural element which is essentially an elevated platform which allows for usage both above and below, these may be terraces over underground car parks, gardens over basements, balconies over terraces and patios.
External Drainage Systems are also known as external tanking, which is the application of a waterproof membrane to the outside of a basement or substructure in accordance with BS 8102:2009 (Type A).
Delta Membrane Systems Limited offer a comprehensive range of ground gas protection solutions along with its structural waterproofing solutions. From our MemTech ground gas membranes to waterproofing systems, our product range is designed to deal with all ground gas, contaminants and waterproofing related problems.
Koster Bauchemie AG specialises in high quality structural waterproofing products and systems. These systems protect and preserve buildings and structures worldwide. Whether the subject is restoration of a heritage building, waterproofing of a new building, reinstalling failed horizontal barriers in masonry, restoration of wet basements, or waterproofing of roofs and facades, rest assured; with our comprehensive and deep product program Koster have the optimum solution.
Koster systems and products stand out due to their exceptionally easy and user-friendly application.
Specialist Basement Drainage – Pumps and Flood Protection
We have a team of application engineers who can assist with selection of ground, surface & foul water pump stations. This can be carried out against drawings, meetings on site & your offices or ‘via net’ viewer sessions.
We can also provide solutions for Flood prevention for both renovation and new build projects.
Damp Proofing – Above ground
Damp Proofing is the process in which methods are used to prevent water/water vapour from travelling through walls and floors from ground level up (rising damp). There are other ways damp can enter walls, but this is the most common.
Delta offer a range of physical and chemical DPC’s that can treat all types of Damp.
Structural Waterproofing – Pre-formed, Liquid Applied & Injection
Delta offer a wide range of waterproofing solutions for all types of applications. Products include pre-formed membranes & ancillary products, liquid applied systems, movement and construction joint waterproofing and injection systems. Please contact our technical team for support in selecting the right system for your project.
Further technical information and guidance is available on the Delta Membrane Systems website or via the BPi download Library
Delta - Koster Joint Sealant FS-V
Koster Joint Sealant FS-V is a flexible stiff/creamy polysulphide joint sealant. When fully cured, Koster Joint Sealant FS-V is a rubbery elastic sealant with a high mechanical load capacity, good resistance to water, sea water, salt solutions, benzenes and mineral oils; it is root resistant, does not rot and it has very good retraction capabilities.
Koster Joint Sealant FS-V can be used to permanently and elastically seal vertical joints in below grade construction, cracks in basements, building foundations, joints in sewage treatment plants, garages, tunnels, etc. It is also suited for application on horizontal joints.
Wildernesse House - Structural Waterproofing Below Ground
The scope of works was to provide extensive renovation works to Wildernesse House; a Grade II listed Georgian House with records as far back as 1327 set in acres of rolling Kent countryside. Within the specification was the requirement to provide watertight living quarters to the basement of this extraordinary property.
Wildernesse House having been used as a sector hospital during the second world war and a Country Club until 1954, when it was procured by the Royal London Society for the Blind (RLSB) as housing for the blind and partially sighted children until 2013 required modernisation to transform it into a luxurious boutique retirement home.
Delta Registered Installers Timberwise (UK) Limited were called upon to offer a waterproofing design to meet the requirements of BS 8102:2009 to achieve a dry habitable living space, defined as a grade 3 environment.
BS8102:2009 is the British Standard that gives guidance on dealing with ground water assessment, drainage and associated risk assessments and buildings partly, and fully, below ground as well as both deep and shallow basements.
The basement to Wildernesse House is constructed from traditional stone and brick with the slab floor being cast of concrete.
On initial site visit previous waterproofing installation had been evident, however the structure was damp from ingressing moisture.
Due to Wildernesse House being Grade II listed a waterproofing system that was suitable for heritage structures was required.
Delta’s Type C Drained System was a perfect solution with its sympathetic reversible ‘air gap’ technology which would be suitable for Grade 1 & 2 heritage structures as the system is reversible.
Initially Timberwise’s technicians undertook repointing works. Over time the decay within Wildernesse House’s basement had allowed undesirable water ingress. All large holes found in the brickwork were sealed in preparation for the waterproofing system.
Prior to the installation of the Type C system, an application of Koster Polysil TG 500 was applied. Koster Polysil TG 500 is an anti-lime inhibiter which reduces the amount of free lime leaching into the Cavity Drainage System.
Following the curing of the Koster Polysil TG 500, 2 coats of Koster NB1 was applied. Koster NB1 is a mineral coated waterproofing slurry which is ideal for sealing brickwork against pressurized water ingress.
The Delta MS Cavity Drain System was installed to the walls and vaulted ceiling with perimeter drainage set into the basement slab. The all-important inspection ports were added at approximately 8 linear meter intervals to ensure that the drainage aspects would be fully maintainable and in accordance with BS 8102:2009.
Phase 2 of the project was to a different area of the basement. This area had earth retaining walls which meant there was a lot of hydrostatic water pressure bearing against the structure.
As with Phase 1, repointing works were undertaken. Any large holes found in the pointing were sealed in preparation for the waterproofing system.
The substrates were then treated with Koster Polysil TG 500 anti-lime inhibitor, which also improves the water resistance of the basement structure by absorbing into the structure and locking in the free lime.
Two coats of Koster NB1 Grey were applied. Koster NB1 is suitable for waterproofing against ground moisture and for non-pressurized and pressurized water up to > 13 bar.
Following the curing of Koster NB1 Grey, the Delta MS Type C Cavity Drain System was installed.
Case Study Results
The client was delighted with Timberwise’s pragmatic and practical approach to this project, assured that Wildernesse House will be preserved for years to come, given Delta’s 100-year product life cycle.
Wildernesse House is designed to bring people together to enjoy all the estate has to offer, we wish all the future inhabitants a happy and relaxing retirement.