DELTA MEMBRANE SYSTEMS LTD
Suppliers of: Basement tanking membranes, waterproofing membranes, structural waterproofing, cavity wall DPC, cellar waterproofing, cavity drainage membranes, waterproofing systems
DELTA is recognised as the UK’s market leaders in cavity drain waterproofing systems. They are the UK arm of Dorken Gmbh & Co KG, the world’s largest manufacturer of cavity drain membranes.
The Delta-Dorken alliance offers an extensive range of waterproof membrane systems, and ancillary products, including sump pump drainage kits, channel systems & more.
Delta also provide full technical support, and can be consulted through all stages of the project. Delta should be contacted early in the design process.
They also operate a Registered Installers scheme across the UK, and can provide details of specialist contractors for the tendering process, and to install the systems. Whether it’s new build, remedial, retrofit or refurbishment, Delta provides waterproofing solutions for basements, and buildings.
Delta Membranes have a complete range to suit most tanking and damp proofing applications, these include:
Basement & extension waterproofing:
Whether you’re restoring a damaged basement or starting from scratch without any real damages converting a damp cellar or basement can be a surprisingly inexpensive way of increasing living space and can substantially increase the value of a property.
Waterproofing Floors, walls and Vaults:
In Soil retaining situations such as basements and vaults etc. The DELTA sealed system is recommended. All membrane junctions, fixing points, service entries and other protrusions are sealed with the DELTA Seal range of sealing products. Where active ground water is evident or expected drainage of one form or another should be incorporated into the specification. Our Technical staff are available to give advice in this respect.
Sumps and Pumps:
Packaged Pump Stations & Water Management Solutions for Collection of Groundwater & Foul Waste from Flooded Basements.
Cellar Damp Proofing:
Delta Membrane Systems are the world’s leading manufacturer of cavity and air gap membrane systems for Cellar Damp Proofing. Delta is used for Cellar Damp Proofing in new construction and refurbishment of cellars, basements, and all types of below ground structures.
Further technical information and guidance is available on the Delta Membrane Systems website or via the BPi download Library
These files are provided by the manufacturer. While Building Products Index takes every care to ensure the information is correct and up to date, we cannot be held liable for any out of date or incorrect information in them. Please check with the supplier before specifying or purchasing products.
1. DELTA Waterproofing System 500 Brochure
Providing Waterproofing Solutions
Published [28/03/17]File size [3038 KB]
2. Delta PT Brochure
Delta PT Delta Lath Waterproof Membrane
Published [03/04/17]File size [1236 KB]
3. Delta Basement Pump Drainage Catalogue
Published [28/03/17]File size [3929 KB]
4. Delta MS 20 Drainage Systems
High drainage capacity in double-shell structures
Published [29/11/16]File size [1648 KB]
5. Delta FM Membrane
Published [10/05/16]File size [2755 KB]
AQUAPROOF Wetroom System
Aquaproof wetroom tanking system
Published [03/04/17]File size [845 KB]
Delta Aquaduct Drainage Pipe
Published [03/04/17]File size [695 KB]
Delta Basement Protection with the Maxx Range
Maximum security for your basement waterproofing pumping system. A battery backup, telemetry alarm system.
Published [03/03/16]File size [1932 KB]
Delta Drain - Cavity drain membranes
We have a extensive range of cavity drain membranes to protect your property against the damage of water ingress caused by hydrostatic pressure (groundwater pressure). Our membranes can also be used as protection against rising damp as well as being gas proof.
Published [10/05/16]File size [537 KB]
Delta Dual Proof Leaflet
durable watertight & gas proof solution for below ground structures
Published [24/03/17]File size [1265 KB]
Breathable UV-resistant insulation protection sheet.
Published [10/05/16]File size [538 KB]
Delta Floraxx and Floraxxtop
Water-retaining drainage sheet with an integrated geotextile for perfect green roofs
Published [12/05/16]File size [1696 KB]
Delta Gas Barrier System Radonsperre
Published [12/05/16]File size [1863 KB]
Delta Geo Drain Quattro
DELTA GEO-DRAIN Quattro
Published [24/03/17]File size [1078 KB]
Delta Green Roof Brochure
Flat Green Roof Systems for Gardens, Terraces, Walkways & Parking
Published [28/03/17]File size [5285 KB]
Delta Horizontal Surfaces References
Horizontal surface drainage in the field
Published [28/03/17]File size [4775 KB]
DELTA Membrane Plaster Lath
damp proof systems
Published [12/05/16]File size [2252 KB]
Delta MS Drain
Enhanced waterproofing protection. Drainage
Published [10/05/16]File size [1345 KB]
Delta MS Sub Base Protection Main
Published [12/05/16]File size [882 KB]
Delta NP Drain
Compact two-ply composite sheet. High drainage capacity through specially-configured dimples.
Published [10/05/16]File size [595 KB]
Delta Polysil-TG500 Anti Lime
Treatment of new Concrete with Polysil
Published [24/03/17]File size [815 KB]
Delta Range of Waterproofing Membranes - 2016
Published [29/11/16]File size [799 KB]
Delta Technical Planning Protection for Foundation Wall
DELTA® systems for foundation-wall protection, drainage, and waterproofing.
Published [12/05/16]File size [1208 KB]
Delta TERRAXX Installation Instructions
High-performance protection and drainage system for basements and flat roofs
Published [28/03/17]File size [4358 KB]
Delta TERRAXX Problem Solver
horizontal structural drainage
Published [18/05/17]File size [1141 KB]
Delta TERRAXX Technical
protection and drainage system for horizontal application
Published [18/05/17]File size [2647 KB]
Delta TERRAXX Vert+Horiz
Protection and drainage systems
Published [18/05/17]File size [2200 KB]
Delta Water Based Epoxy Coating
membrane to prevent rising damp in floors and walls
Published [18/05/17]File size [1060 KB]
multiple use crack bridging waterproofing,
Published [29/11/16]File size [506 KB]
KÖSTER Bitumen Primer
Solvent-containing bitumen primer
Published [29/11/16]File size [256 KB]
KOSTER Company Brochure
Published [29/11/16]File size [1793 KB]
KÖSTER Deuxan 2C
two component, polystyrene-free, fibrated, polymer modified bitumen
Published [29/11/16]File size [242 KB]
KOSTER External Basement Waterproofing
External Basement Waterproofing
Published [29/11/16]File size [1781 KB]
Koster KB Flex 200 Flyer
Immediate Waterproofing of Pipe and Cable Penetrations
Published [29/11/16]File size [274 KB]
KÖSTER KSK SY 15
Cold self adhesive bitumen membrane with HDPE top foil
Published [29/11/16]File size [241 KB]
KÖSTER Repair Mortar Plus
Fast setting, expanding repair mortar
Published [29/11/16]File size [234 KB]
KÖSTER Tanking Products
External tanking products
Published [29/11/16]File size [321 KB]
KOSTER Waterproofing of Wetrooms
Waterproofing of Wetrooms
Published [29/11/16]File size [753 KB]
1-9 Seymour Street, London – Uses Delta Köster NB1
In June 2013 it was announced that £500 million would be cut from the Metropolitan Police budget, 65 of the least used police front counters across the capital were proposed for closure. Marylebone Police Station had its fate sealed and the old police station closed in June 2013.
In 2015, Westminster City Council's planning department granted The Portman Estate planning permission to demolish the existing building at 1-9 Seymour Street and to redevelop the site. The scheduled demolition and clearing of the site was to make way for a new seven storey mixed use building, which was to include a two level basement, residential block, restaurant, retail space, commercial office block and school.
Some of the key challenges to this project were:
Ensuring a fully functional waterproofed basement which would accommodate the building and its future use.
Responsibility for full façade package including onerous performance criteria.
Multiple façade treatments with complex interfacing. Totally bespoke projecting glass and steel bays.
Bespoke vitreous enamel window liners.
Complex inner city environment with significant delivery challenges.
1-9 Seymour Street is a 90,000 sq ft technically challenging project with a multiple façade.
Whilst the multiple façade is a key feature, it is also a disadvantage. A detailed design and a sound approach would be applicable to this project from the onset. The main contractor Galliford Try undertook the complex underpinning and formed the two levels of basement.
There is always a level of risk to damaging other buildings in the vicinity when dealing with demolition, re-build and basement construction, this risk was designed out in collaboration with renowned Architects Eric Parry. During this phase Galliford Try successful reached all of their goals without causing any damage to surrounding structures.
This project required a sympathetic knowledgeable basement specialist. Guardian Preservation with its reputation of working with homeowners, surveyors, contractors, architects, landlords and management companies was a natural choice. Guardian Preservation have a long established relationship with Delta Membrane Systems Limited and the two businesses have regularly shared experience and knowledge.
Both Guardian Preservation and Delta Membrane Systems Ltd were included at the design phase so were able to add consideration and give expert advice during the crucial planning stage. The basement dig was planned with the use of piling. On this project contiguous piling was deployed in conjunction with an inner RC lining wall.
Tim Herbert, CSSW qualified Structural Surveyor and partner at Guardian Preservation commenced his involvement in the project by giving careful consideration to products available, how they would be best suited to the project, that all BS8102:2009 standards and considerations were met, that the site was kept in a safe manner (health and safety) and that all Building Regulations were adhered to.
Tim’s approach to the project was to initially make contact with Delta Membrane System Limited’s David J Symes, Technical Director; along with David’s advice no assumptions were made. As with any basement construction consideration to groundwater, soil type, precipitation, topography and ground conditions/site analysis needed be addressed. Tim and David’s approach was to carry out full and throughout checks and to make a decision on what types of waterproofing would be best suited to this project, as no two projects are identical.
Waterproofing a basement ensures that the integrity of the structure is preserved whilst ensuring the usefulness of the basement. All basements should be constructed to cope with groundwater levels up to the full retained height of the basement.
Tim and David, during consultation took into consideration the British Standard BS8102:2009. BS8102:2009 is the code of practice for protection of below ground structures against water from the ground.
Guradian Preservation installing Delta System BS8102: 2009 sets out the scope and limitations for below ground structures, areas covered include:
waterproofing barrier materials,
waterproofing to construction joints within the RC frame construction,
ensuring buildings are structurally integral with watertight construction,
drained cavity construction,
ground water assessment,
ground water drainage; and
associated risk assessments.
An initial and important consideration in the overall waterproofing strategy was to ensure that all construction joints were appropriately detailed and waterproofed using Hydrophylic waterstops – such as Koster Quellband, which expands in contact with water to seal the construction joint.
Tim sought to incorporate materials that would best meet the objectives set out in Section 10 of BS8102:2009. Through knowledge and experience Tim sought David’s advice to incorporate 2 forms of waterproofing. With over 2500sq.M to cover Tim decided to incorporate Delta Membrane Systems Limited’s NB1 in-depth migratory crystalline slurry (a Type A System, a water barrier), and Delta MS500 and Delta MS20 (a Type C System, cavity drain membrane system).
Köster NB1 is a crystallizing mineral waterproofing slurry system which has a capillary plugging agent ideal for sealing against pressurized water (> 13 bar) and is watertight (>130m water head). Köster NB1 is a Type A waterproof system as set out in BS8102:2009. NB1 is suitable for new builds and in restoration properties. Köster NB 1 Grey is characterized by its excellent resistance to pressure and abrasion as well as excellent resistance to chemicals.
Tim opted to apply the Köster NB1 with a peristaltic pump providing a uniform spraying application, this method saves considerable man hours and is a great way to ensure complete even coverage.
Having applied a Type A waterproofing system Tim opted to add a secondary Type C system offering a robust waterproofing design.
By adding a secondary Type C system the basement would be completely watertight, if any water ingress was to occur in future the Type C system would be able to deal with this so as not to compromise the structure.
The Delta NB1 Koster MS500 is a premier cavity drain membrane and was used for the waterproofing of the walls. The Delta MS500 was fixed using Delta Qwik-seal plugs, fixed at 600mm centres with added benefits of Delta double-sided butyl tape to seal joints and overlaps. Delta butyl Corner strip tape was added to seal wall/floor joints.
The Delta MS20 is a champion cavity drain membrane used for waterproofing the floors. This is a heavy gauge version and incorporates 20 mm studs which offer extra drainage capacity. Delta MS20 was used as a “cavity former” for this type of new construction. The Delta MS20 is neatly rolled out across the basement floor; the sheets are overlapped and sealed in accordance with the manufacturer’s instructions.
Corner strip tape was added to seal wall/floor joints.
Case Study Results
Delta system installation by Guardian Preservations
The basement structure has been constructed to cope with any future water ingress and will withstand the test of time.
Galliford Try were thrilled with the outcome.
The project was achieved on time and within budget.
The finished project will be a truly stunning building that adds to the growing portfolio for all involved and will add to London’s ever evolving skyline and landscape.
Delta Membrane Systems Ltd proud winners of the Property Care Association Award
Delta Membrane Systems Limited proud winners of the Property Care Association, Property Care Innovation and Sustainability Award 2017.
In 2016 when David J Symes, Technical Director of Delta Membrane Systems Limited (a PCA member), joined a focus group of experts across many disciplines under The Property Flood Resilience Action Plan, an umbrella headed by Dr Peter Bonfield OBE, Chairman, no one could have envisaged how the project would progress.
Avenues were explored to tackle flooding and flood resilience. Within the focus group were various experts allowing for a cross section of knowledge, those included Stephen Garvin, Director of the BRE Centre for Resilience, Clare Moriarty (Permanent Secretary, DEFRA), Emma Howard Boyd (Chair, Environment Agency), Gareth Howell (Managing Director, Direct & Retail Partnership, AXA Insurance) and Stephen Hodgson CEO (of the PCA) to name but a few.
The concept to join forces to find ways to prevent flood damage and ways to combat the devastation caused by flooding and to ultimately help families “get back in sooner”.
Delta Membrane Systems Ltd’s Technical Director, David J Symes produced a specification using tried and tested technology Delta Membrane Systems Limited have used for many years, historically in Basement or below ground structures/situations with consideration as to how we could adapt these products to work in flood situations.
With every scenario considered, a scheme was developed utilising a Delta Membrane System’s wall membrane “Delta MS500” and Delta floor membrane “Delta MS20” with a Delta sump and pump system (a Delta Dual V3 sump), with high level alarm “AlertMaxx” and a battery back-up “PowerMaxx”, part of the Delta Maxx family.
Flood water entering a home causing extensive damage to the fabric of the building which can lead to Insurers appointing a loss adjuster to assess the extent of the damage and the claim. The strip out following with the implementation of dehumidifiers to dry out the structure, (a process which takes numerous months) and Insurers bear huge financial costs. The financial burden not just with the structural repairs but also in providing alternative accommodation for their families left homeless.
In order to significantly reduce downtime, a Delta membrane can be fitted to the walls as demonstrated within the BRE test house. The Delta membrane is a HDPE extruded sheet, “its dimpled” and therefore provides an immediate barrier against the effects of salts and contamination caused by water ingress and or flood water allowing fast track reinstatement at the same time allowing the wall to dry out. Similarly when a solid floor is constructed; an overlay with Delta MS20 also demonstrated in the BRE test house which is a 20mm extruded sheet prior to the inclusion of finishes such as insulation and screed. In short the walls and floor have been lined with a cavity drain membrane which provides an air gap.
Secondly, David suggested making the structure more resilient by installing a Delta perimeter drainage channel rebated into the floor, this deals with and ground water which may rise through the floor in the future, or through the walls behind the MS 500, the drainage channel collects the water from beneath and behind the membranes and immediately evacuates it to the Delta packaged pump station which houses two submersible pumps, the lower end of the spectrum Delta pump will evacuate 2 litres per second per pump so a total of 240 litres per minute, we can offer alternative pumps that will evacuate 6 litres per second each.
A further modification, David instructed was a standard 110mm pipe to be laid within the slab and turned up 90 degrees to provide drainage outlets which finish flush with the floor finishes, which can be located in unobtrusive locations covered with a floor grill, as installed in the BRE flood house.
This was designed to pick up water that may bypass flood gates which should be installed in conjunction with the system and immediately evacuate it reducing damage, floors are typically tiles in floor mapped areas after flooding to reduce damage and other products can be installed such as waterproof insulation and plasterboard and screeds.
The Delta system can be installed both into existing properties and in new construction. As with below ground waterproofing each design is bespoke to the property and each associated risk.
The BRE have successfully demonstrated the resilience and resistance of the flood house. The Flood Resilience House is a great success and the foundation for incorporating these measures in our homes has been laid.
Congratulations to all at Delta, special thanks to David J Symes, Rachel Munro and Georgia Burbridge for their contribution to this great project.