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Delta Membrane Systems Ltd

Delta Membrane Systems Ltd

Delta Membranes

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Basement and External waterproofing

Basement and External waterproofing

Delta Membrane Systems Ltd

The scope of this ambitious project was to restore and transform an abandoned Neo-Gothic Cemetery Keeper’s Lodge with adjoining public facility into a luxurious mansion in just 12 months.  Works included demolishing the adjoining public facility to enable the construction of a new basement.The proposed new build construction would be a luxury ground floor extension which would run the footprint of the redundant public facility to offer a 4,000 square foot subterrain space with key features such as 13-meter swimming pool, 2 additional bedrooms, a tv games room and office space.Simon Gill Architect designed the ambitious project and was appointed as Project Manager.Delta Registered Installers 5 Star Basements were employed to undertake both dig out and installation of the structural waterproofing with Delta’s Technical Waterproofing Consultant, Paul Callaghan representing Delta. This approach at the design stage, allowed Paul to attend design team meetings and to ensure all criteria’s of BS8102:2009 were met.As aired on Grand Designs on 6th January 2021.
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Basement Extension

Basement Extension

Delta Membrane Systems Ltd

The project was split into 2 phases. Phase 1, waterproofing the exiting basement and Phase 2, retrofit extension to the existing basement to create a luxurious multiuse living area. Due to the partially retaining nature of the structure, the project required a combination of Type B and C waterproofing systems to ensure a Grade 3 habitable environment.
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Basement Renovation

Basement Renovation

Delta Membrane Systems Ltd

Shooters Sports bar is a modern sports bar located in Neath Town Centre, a principal area of Port Talbot, Wales.  A popular venue, well known for its 6 screens showing live sports, licensed bar and pool, American pool and snooker tables.Delta Registered Installers, Tywi Damp Proofing were first approached to offer remedial assistance with a section of wall which was experiencing severe water ingress.The structure being of reinforced concrete and old wall construction was allowing water ingress via cracks in the structure.Most faults in older structures which allow water ingress are either damaged or deteriorating mortars.Any cracks in the brickwork or substrates will also allow water to enter a structure and would need addressing in creating a Grade 3, habitable space under BS8102:2009 “Code of practice for protection of below ground structures against water from the ground”.Prior to proposing remedial works, ground water assessment, drainage and associated risk assessments were all undertaken.
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Basement Waterproofing

Basement Waterproofing

Delta Membrane Systems Ltd

This luxurious residential project incorporated a double level basement with the lower level extending out underneath the garden. In regards to the below ground structure Knowles & Associates Ltd undertook the following works: Excavation and formation of a basement to footprint and under 7 metres below garden level. Two/three stage underpinning. Internal steel staircase frame. Piling. Mass excavation of spoil. Construction of rear extension. Below slab drainage. Cavity drain Waterproofing. Insulation and screed. Swimming pool shell within lower level basement.
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Basement Waterproofing and Ground Gas Protection

Basement Waterproofing and Ground Gas Protection

Delta Membrane Systems Ltd

To fulfil the requirements of BS8102:2022 and BS 8485:2015+A1:2019 a strategy to develop a specification which combines structural waterproofing and ground gas protection were required for this refurbishment project.The project involved creating additional living space to an existing mid terrace Victorian property in W12. The site of the property, whilst not being located on contaminated land was identified as being potentially at risk, it was near what is classed as contaminated land (an old brick yard).To satisfy Building Control requirements gas protection measures were required to meet BS 8485:2015+A1:2019.Site investigations at former brickworks and landfill sites are within expected UK guidelines for contamination. Ground investigations incorporate both soil sampling, ground gas and groundwater monitoring.In accordance with Table 3 of BS 8485:2015+A1:2019 a residential building is classed as a Type A building, creating a “high risk” requirement for ground gas protection. With the structure requiring a Grade 3 habitable environment attention as required to offer a system which meets all requirements.
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BRE Flood Reilient Test Home

BRE Flood Reilient Test Home

Delta Membrane Systems Ltd

Delta Membranes were delighted to be invited by the BRE in adapting a property which could offer Flood Resilience. A housing unit within the BRE (a Victorian Terrace) was refurbished to demonstrate materials, products and innovations that will make it flood resilient. There are an estimated 5.2 million homes considered at risk from surface, river and coastal flooding. Preventative measures play a key role. The specification for resilience, using the same technology Delta have used for many years in Basements or below ground situations with additional consideration as to how we could adapt this to work in flood situations.
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Commercial to Residential Basement Conversion

Commercial to Residential Basement Conversion

Delta Membrane Systems Ltd

Commercial to residential, it may be last orders for some of our great British pubs, for other’s its discovering exciting ways of transforming commercial structures into luxury residential dwellings.  The growing trend of converting old inns offers new homes a unique history whilst being packed with character and features.Delta Registered Installers, Advance Property Preservation Ltd were engaged to assist on a troublesome vaulted basement to a property, based in central London which had already been converted into high living accommodation.Just off the basement area were two large vaults around 12m long. Made from brick barrel construction, this below ground space had previously used for storing kegs of ale!One of these vaults had previously been converted into a spa area with jacuzzi and steam room, the other was used as a storage area. The owners had previously had the storeroom tanked with a Type A, render system, however this approach repeatedly failed, allowing for substantial water ingress which was causing damage to items stored in this area.With Structural Waterproofing one of the major contributors to project failure lies with the design. When hiring contractors, ensure the design, procurement of materials and installation is undertaken by one specialist will naturally reduce these known and associated risks. A specialist contractor will always be able to offer quality assurances.
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Cumbria Flood Resilience Showcase Project

Cumbria Flood Resilience Showcase Project

Delta Membrane Systems Ltd

Edenside Barn is a real-life demonstration property in the Cumbria Flood Resilient Showcase Project. The idea behind the Flood Resilient Showcase Project was to use products and materials that will try to keep water out of properties prone to flooding. In a flooding event that is less severe, those products (all of which have been tested to a high specification) are expected to reduce water ingress.
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Damp Remedial Solutions

Damp Remedial Solutions

Delta Membrane Systems Ltd

Chepstow is a beautiful town and community in Monmouthshire, Wales. Located on the tidal River Wye, roughly 2 miles before the confluence of the River Severn. Steeped in history, Chepstow’s Great Tower keep was commissioned by William the Conqueror following the Battle of Hastings.With high ceilings and spaces which feel luxurious there is simply something that draws us towards the vast expanse of space and the warmth offered by listing buildings such as converted barns and farmhouses, often because of their idyllic rural locations.Delta Registered Installers, Tywi Damp Proofing were commissioned with the sympathetic conversion of an old farmhouse located in Chepstow. The project scope was to convert 1 listed farmhouse into 5 separate dwellings.Original features, such as 5ft thick walls were embraced in this conversion project.During initial inspections, penetrating damp was found. Penetrating damp is often referred to as lateral damp, which is the development of moisture through walls, roofs or any ground area of a structure. If left untreated this penetrating damp will cause problems for the structure envelope and can lead to significant damage to the fabric. Penetrating damp can be caused by a combination of problems such as the structure’s age, construction and exposed location.
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External Waterproofing System - Hobbit House

External Waterproofing System - Hobbit House

Delta Membrane Systems Ltd

The scope of this project was incredibly interesting. The owners sought to create a subterranean space which had the look and feel of a magical ‘Hobbit Home’ as if created by J. R. R. Tolkien himself.
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Flood Recovery – Grade II Listed Building

Flood Recovery – Grade II Listed Building

Delta Membrane Systems Ltd

Delta products were used at ground level on a semi-detached property in Hertfordshire that suffered from severe flooding. After the flood at the Grade II listed property in Long Marston, restoration experts DJ Hutchings of Towcester was called in, and – in turn – they called upon the services of Peter Cox . Work includes the full strip-out of all wall finishes and the solid floor on the ground floor. Mass underpinning took place to all the external walls. Included in the materials supplied by Delta is the MS500 system applied to all ground floor walls and MS20 on the floors.
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Future Proofing Waterproofing Multi Level Commercial New Build Structure

Future Proofing Waterproofing Multi Level Commercial New Build Structure

Delta Membrane Systems Ltd

Delta’s Structural Waterproofing Consultant, Paul Green, CSSW alongside Delta’s MD, Kevin Dodds, were appointed to the design team to collaborate with the Architects, Engineers, Main and Sub-Contractors to fulfil the role of Waterproofing Design Specialists in providing a reliable, watertight solution for this substantial project.The large-scale basement project consists of a 4-storey deepbasement located close to the River Thames in Central London.The proposed subterranean space would offer multiple usage. This complex project required a waterproofing design which is, able to cope with intermittent/regular hydrostatic pressures created not just by groundwater, but also geographical tidal impacts from the river Thames and potential stress challenges caused by the surrounding infrastructure such as heavily trafficked railway lines in the development’s vicinity.Structures that experience a high level of vibration fromsurrounding infrastructure can, over time, have a high propensity to suffer cracks, which could lead to failure of some waterproofing solutions, so therefore careful considerations should be incorporated into the overall waterproofing design from those aspects and, the impacts these factors can have on an elected waterproofing system.Delta’s design philosophy rotated around creating a robust and suitable waterproofing design, the structure design, a continuous system, sequencing and installation, future maintenance, and serviceability, whilst able to fulfil requirements set out in BS 8102:2022 Protection of below ground structures against water ingress. Code of practice. The British Standard which governs waterproofing of substructures.
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Lightwell Waterproofing Solutions

Lightwell Waterproofing Solutions

Delta Membrane Systems Ltd

The scope of the project was to facilitate a solution for a damp, salt and mould covered lightwell wall, which was impacting negatively on staff who thought their office views were unsightly and unhygienic.
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Luxury North London Residence

Luxury North London Residence

Delta Membrane Systems Ltd

Delta Membrane Systems Limited was asked to assistance on a particularly technically complicated project. The project in question was a new build luxury property in North London, providing almost 17,000 sq ft of accommodation, over four floors.  High volumes of hydrostatic water pressure was bearing on the structure, which was causing the property to suffer severe water ingress through construction joints. The property when constructed was built at a low level, it sits lower than the neighbouring properties adding to the hydrostatic water pressure issue.  An additional problem was the property had been built without a waterbar/hydrophilic strip.
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Maintainable Waterproofing solutions

Maintainable Waterproofing solutions

Delta Membrane Systems Ltd

The scope of the works was to design, specify and install a suitable waterproofing solution to 2 large properties engineered from ICF construction which required waterproofing. Areas where attention from a skilled specialist were required, was to the rear and two side walls which were earth/ground retaining.When specifying a suitable waterproofing solution, consideration to the final use of the building, designing a system to be maintainable and repairable along with a deep understanding of BS 8102:2009 is essential in ensuring project success.From a waterproofing design perspective, we use three grades to define waterproofing systems.These 3 grades are:Grade 1 – Some water seepage and damp are tolerable depending on the intended useGrade 2 – No water penetration is acceptableGrade 3 – No dampness or water penetration is acceptableIn existing basements and new build properties which will be habitable, Grade 3, is always required.
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North London Synagogue - Structural Waterproofing Basement

North London Synagogue - Structural Waterproofing Basement

Delta Membrane Systems Ltd

This project is unusual and offered an interesting scope. Delta was approached to give assistance on designing a robust waterproofing solution to a new build basement within a Synagogue in North London. The main contractor having previously worked with Delta, knew Delta would be able to provide this project with a high calibre waterproofing design whilst offering respect for the community it serves.
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Public House Cellar Conversion

Public House Cellar Conversion

Delta Membrane Systems Ltd

Delta Registered Installers, Oaks Damp Proofing having previously undertaken work for the client were commissioned to design and install a Cavity Drain Waterproofing system that would meet BS8102:2009 the British Standard for the protection of structures against water from the ground, Grade 3 (no dampness or water penetration acceptable) to the cellar area of The Blonde Hedgehog. The Cellar having been used historically to store beer was not waterproofed historically. Beer cellars are notable for being very cold and wet. For hundreds of years beer cellars were always underground – because underground rooms are generally quite cool.
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Remedial Basement Waterproofing

Remedial Basement Waterproofing

Delta Membrane Systems Ltd

When it comes to residential, commercial or any structure below ground, waterproofing is a critical component within the construction process for protecting and preserving a building. A poorly designed or installed waterproofing solution can fail leading to significant implications on the structure itself.Delta Registered Installers, Abtech (UK) Ltd were called upon to give assistance on a particularly technically complicated project where approaches to waterproofing design and installation had been incorporated, however the system had failed. For a great remedial waterproofing outcome, seek assistance from an experienced waterproofing company to inspect your site and carry out the remedial work.The property when built had a Type C, cavity drain membrane systems incorporated (not a Delta System), however there was no basement drainage incorporated into the design to manage water ingress.In principle a Type C, drainage system is a water management system. The Type C system is used to control water ingress once it has penetrated the structure.  Moisture or running water travel behind the Type C membrane within a controlled drainage system. A Type C System isn’t classified as a barrier but provides protection by means of water management. For a Type System to be successful a suitable drainage system is required to collect and discharge water ingress to a suitable and safe evacuation point (either by natural forces or a mechanical pump system).When correctly installed, groundwater drainage channels effectively relieve hydrostatic water pressure in the below ground structure. They are installed below flooring membranes at the floor/wall junction.
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Remedial Waterproofing - Commercial Structure

Remedial Waterproofing - Commercial Structure

Delta Membrane Systems Ltd

Waterproofing design is a key and critical component for successful construction of below ground structures. Whether it’s a completely new build or making smaller changes to an existing property, waterproofing design should never be overlooked.Waterproofing might account for just a small fraction of a building’s total cost, but waterproofing defects can result in catastrophic consequences. When waterproofing fails, the implications are significant.Delta’s MD, Kevin Dodds was approached to offer advice and guidance on a failed waterproofing system.The existing structure had an impressive 5-level basement which houses: kitchens, food storage and food preparation areas, spa, plant rooms and accommodation. Near to a large river, the site sited well within the water table. The original waterproofing system was based on the secant piled walls and a block wall internally to provide a basic drained protection system with drainage holes at various points to drain to various levels.Over time, the third floor had become completely saturated with all levels of the basement experiencing water ingress in varying levels from damp patches to significant “jets” of water and flows of water through the secant piles.With remediation waterproofing design strategies, it may take some time to specify a suitable system. It is important that investigations are thoroughly carried out by individuals with the capability of diagnosing the defect, assessing the extent of that defect, and recommending a suitable corrective measure.
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Rose Hall Cottage, Flood Resilience Project

Rose Hall Cottage, Flood Resilience Project

Delta Membrane Systems Ltd

Delta’s design philosophy was to devise a suitable flood resilience measure that would protect this property from the effects of future flooding, like what had previous occurred. Information gleaned from the survey visit enabled Delta to offer a fully effective solution for the intermittent yet long term flooding problem.
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STOCKTON GLOBE - Sympathetic Waterproofing Solution

STOCKTON GLOBE - Sympathetic Waterproofing Solution

Delta Membrane Systems Ltd

Delta’s Technical Team along with Delta Registered Installers Marsden Damp Services were approached by the main contractor Wilmott Dixon to give assistance on designing a robust waterproofing solution. Working in collaboration with the architects and project team, this team of waterproofing experts were easily able to offer a simplistic and practical approach.The project was split into 2 phases with Phase 1 waterproofing the existing stage and orchestra pit and Phase 2, the seating and ancillary rooms which all required the installation of a Type C waterproofing system to ensure a Grade 3 habitable environment was created.
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Structural Waterproofing & Ground Gas Protection

Structural Waterproofing & Ground Gas Protection

Delta Membrane Systems Ltd

The project was to convert a former vehicle maintenance and repair workshop into a dwelling. Ground tests did not reveal any significant level of Volatile organic compounds (VOC’s) in the soil but the local authority required a gas membrane to be installed and independently verified.
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Structural Waterproofing - Grade II listed Georgian House

Structural Waterproofing - Grade II listed Georgian House

Delta Membrane Systems Ltd

Delta Registered Installers Timberwise (UK) Limited were called upon to offer a waterproofing design to this Grade II Listed property to meet the requirements of BS 8102:2009 to achieve a dry habitable living space, defined as a grade 3 environment.
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Structural Waterproofing - Private Residence

Structural Waterproofing - Private Residence

Delta Membrane Systems Ltd

The Scope of the project was to provide a structural waterproofing solution to a private dwelling with new build extension.The property, situated on a sloping site gave the opportunity for the waterproof design to utilise the properties environment to allow for natural discharge of any potential water ingress.The property was detached and retaining to the front and side elevations where the retaining ground slopes down and away from the property to a garden that continues to slope down to a small stream. The retaining walls on either elevation rise at their highest point to approximately 1500mm above the internal floor level.The internal walls of the property were original brick to the front and new cavity built concrete block. The floor to what was the original house is of solid concrete construction joining on to a newer block and beam floor construction.When designing the most appropriate waterproofing system to any given situation, various design factors require addressing such as (but not limited to), final use of the building, the grade of waterproofing requirement under the British Standard, structural considerations based on the form of construction and in some cases, satisfying the requirements of building warranty providers.
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Structural Waterproofing and gas proofing using membranes (twin solutions)

Structural Waterproofing and gas proofing using membranes (twin solutions)

Delta Membrane Systems Ltd

The design concept of this project focuses on the demolition of an existing building and replacing it with a new build mixed use development of 6 storeys (plus basement) 9 self-contained units on floors 1-5 and 377sq m of commercial space on the basement and ground floors. During the Phase 1 Primary Risk Assessment, borehole and trial pits revealed Dibenzo (a,h)anthracene, CO², TPH and Asbestos contamination. The proposed remedial strategy to be adopted at the site was one of managing the pathway between the source of contamination and the critical receptors on-site.
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Structural Waterproofing Mixed Commercial Development

Structural Waterproofing Mixed Commercial Development

Delta Membrane Systems Ltd

This project required a robust and a meticulously detailed specification with Delta Registered Installers, Cemplas being appointed waterproofing contractor to guarantee a watertight basement.
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The Gunnery, Kent

The Gunnery, Kent

Delta Membrane Systems Ltd

The Gunnery, Kent is a unique and interesting project. Delta Membranes were appointed as Waterproofing Designer to transform an unused fort/home in Kingsdown, Kent. The building was situated 92ft on a cliff edge. The Gunnery was originally a military base with extended underground rooms and thought to have ‘secret rooms’ underground. The building had suffered from fire damage as well as vandalism over the years and had been left to ruin. During a site visit various considerations were given to what Delta product would be best suited to the job, given the restrictions imposed by the existing structure.
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The Hub, Hattersley - Leaking Podium Deck

The Hub, Hattersley - Leaking Podium Deck

Delta Membrane Systems Ltd

Delta were employed to assist on this leaking podium deck project. Following a full assessment of The Hub and its underground parking facilities it was identified that rainwater was entering the basement car park through the ceiling deck at multiple points. These points included holes that were formed to allow drainage from the surface, movement joints and investigation holes that had been created through the steel rib and concrete deck. Based on “as built plans” a system was designed post construction that would offer the same quality of structural protection had it been incorporated during the build phase.
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Tunnel Waterproofing, London Underground

Tunnel Waterproofing, London Underground

Delta Membrane Systems Ltd

The brief of this project was to carry out a trial on a section of track (the Metropolitan Line) located close to Farringdon station to provide an elastic, permanent repair waterproofing solution which would not cause any detrimental effect to the structure nor the trains passing through it.
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Type C, Cavity Drainage Waterproofing

Type C, Cavity Drainage Waterproofing

Delta Membrane Systems Ltd

Delta Registered Installers, Bensleys provided a waterproofing solution on an iconic Brighton structure.Steeped in history and thought to be built on the original Brill Baths site, sits Clarendon Mansions. This large, detached structure is thought to have been built in 1870 by Charles Brill during the Brighton boom.The four-storey building facing Brighton’s famous sea front, was originally constructed as a hotel.Numerous refurbishments over subsequent periods of time, saw the structure move from a hotel to a public house, with the basement area being unoccupied for nearly a decade.The basement area boasts large, vaulted areas to the south and west elevation, with the south-side possibly being part of the original Bath structure.Bensleys were instructed by the main contractor, Pilbeam Construction on behalf of Evolution Architects, to help design, specify and install the waterproofing system.There’s no one-size-fits-all when it comes to waterproofing design. With the basement suffering from water penetration, Bensleys worked with the design team at an early stage of the project to ensure the right approach be taken, which included multiple factors such as: customer requirements, standards, robustness, cost, resources, time, skill required, safety and expectations of ground water which all translated into a design solution.
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Waterproofing Basement Vaults - Leeds

Waterproofing Basement Vaults - Leeds

Delta Membrane Systems Ltd

Delta Registered Installers, Premier Preservations, were approached to offer a waterproofing design and system to a basement, to ensure the vaults – located under the entire footprint of the property were protected from water ingress.
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Waterproofing Solution BS 8102:2009

Waterproofing Solution BS 8102:2009

Delta Membrane Systems Ltd

The scope of the project was to facilitate a waterproofing solution for a substantial brick built detached property with a large 3 elevation basement situated at the bottom of a steep sloping driveway. The basement when constructed had 1 form of external waterproofing incorporated during the build stage, however the system required a second form of internal waterproofing due to the location of the structure and high-water table, capable of protecting the luxurious basement from unwanted water ingress.The property’s driveway significantly slopes from street level to the front elevation of the property requiring a specialist waterproofing system to protect the structure.Working in conjunction with the homeowner, Timberwise’s CSSW qualified waterproofing surveyors specified a Delta Type C (Drained) Protection waterproofing system to provide the necessary Grade 3 (habitable environment) to enable to homeowner to fully utilise their basement space. For Grade 3 habitable environments, two types of waterproofing may be required.A Waterproofing Designer’s philosophy defines what they wish to accomplish in the design of their waterproofing system and which principles they will use to do so. Identifying a robust and suitable design philosophy is an important aspect when designing a continuous system, as this will not only directly impact in how users install the system but also in future maintenance which will directly impact on the property owner.
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Waterproofing solution to Grade II Listed Commercial Structure

Waterproofing solution to Grade II Listed Commercial Structure

Delta Membrane Systems Ltd

The brief for this project was to design, supply and install a bespoke and sympathetic waterproofing solution to a Grade II listed, commercial structure with an impractical damp basement.Delta Registered Installers, MacLennan Waterproofing worked closely with the Principal Contractor, HB Projects to achieve a Grade 3 habitable space whilst preserving this historic structure.The Co-op shop in Petworth Village, provides the local community with everything they need, whether its household essentials or a place to meet friends.The site incorporates two Listed Buildings, including part of a Listed Church. The store applied for listed building consent to reconfigure its ground and basement floors, to increase the retail floor space and improve the functionality of the store.When designing a waterproofing/damp proofing solution in a historic building or a structure of architectural interest, additional design considerations should be employed during the design stage to maintain preserve aesthetic and structural integrity of the structure/building. The waterproofing design should be sympathetic in application whilst offering a robust solution.Care consideration should be applied when specifying products to ensure they are ideally suited for meeting the complexities of listed building requirements.
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Waterproofing Solutions for Sporting Facility

Waterproofing Solutions for Sporting Facility

Delta Membrane Systems Ltd

This large new-build structure required to be waterproofed to meet BS 8102:2009, the British Standard for the Protection of Structures against Water from the Ground requirements. As it is not possible to determine the amount of potential water pressure surrounding the structure, BS 8102:2009 states the waterproofing designer should expect a head of water against the structure at some stage during the structure’s service life.
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Waterproofing vaults (using Type C Systems)

Waterproofing vaults (using Type C Systems)

Delta Membrane Systems Ltd

Vaults are a common feature of 18th and 19th century buildings in Bath. Originally built to support the cobbled streets above and were a constructional response to the precipitous topography that surrounds Bath, in order to provide a level site. Many of the vaults within historic Bath suffer with water ingress and damp related problems. Incorporating best practice guidance - Type C Waterproofing Systems (BS 8102: 2009) a Type C System was used to keep this historic vault watertight and dry.
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West London – Combination Waterproofing (2 forms) to BS 8102:2009

West London – Combination Waterproofing (2 forms) to BS 8102:2009

Delta Membrane Systems Ltd

When specifying the most appropriate method of waterproofing for a new-build basement it is advisable to follow the recommendations within BS 8102:2009 ‘Code of Practice for Protection of Below Ground Structures Against Water from the Ground’. The standard advises on the types of waterproofing available and confirms the performance grade to be achieved. This project required Grade 3 protection – no dampness or water penetration acceptable.

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