​​Watertight Concrete Solutions

Master Builders Solutions now have an entire product portfolio to cover Type A, B & C construction to BS 8102:2009 code of practice.

• Innovative pore blocker technology
• System warranty up to 25 years
• Single source system approach
• Full site support and training
• BS 8102 & NHBC compliant
• BBA approved systems

Product Offering

• MasterSeal 754 – Pre-applied FPO waterproofing membrane with MasterSeal 934 Waterproofing tape
• MasterSeal 754 SB​ – Post-applied FPO waterproofing membrane for below ground concrete structures​​
  

• MasterLife WP 799 – Water resisting admixture for concrete
• MasterSeal 910 and MasterSeal 912 System – Hydroswelling waterbar and mastic (adhesive) for construction joints
• MasterInject 900 & MasterRoc MP 307 CE System – Re-injectable hoses waterstop and injection resin for construction joints
• MasterSeal 925​ – Swelling rings and plugs for formwork tie-holes
  

Grades of Waterproofing

BS 8102 classifies three grades of waterproofing protection – Grade 1 Basic Utility, Grade 2 Better Utility and Grade 3 Habitable.

• Grade 1 environments include car parks, plant rooms (excluding electrical equipment) and workshops. BS 8102 defines the performance level of Grade 1 environments as ‘some seepage and damp areas tolerable, dependent on the intended use, local drainage might be necessary to deal with seepage’.
• Grade 2 environments include plant rooms and workshops that require a drier environment than that of Grade 1. The performance level of Grade 2 is defined as: ‘no water penetration acceptable, damp areas tolerable; ventilation might be required’.
• Grade 3 environments include ventilated residential and commercial areas, including offices, restaurants and leisure centres. The performance level Grade 3 is defined as: ‘no water penetration acceptable, dehumidification or air-conditioning necessary, appropriate to the intended use’.
  

Types of Waterproofing Protection

BS 8102 classifies three grades of waterproofing protection.

• Type A barrier protection against water ingress which is dependent on a separate barrier system, typically bonded sheet membranes, applied to the structure.
• Type B structurally integral protection against water ingress, which is provided by the structure. This type of waterproofing protection is actually integrated into the concrete structure and typical products used include water resisting admixtures compiling with Table 9 of BS EN 934-2:2009 (Admixtures for concrete, mortar and grout) for watertight concrete combined with appropriate joint sealing systems for connections, construction and movement joints
• Type C drained protection against water ingress into usable spaces which is provided by the incorporation of an appropriate internal water management system.
  

National House Building Council (NHBC) Risk-based Design

Chapter 5.4 (Waterproofing of basements and other below ground structures) requires that waterproofing design should be appropriate to the risk and generally assume exposure to a full height of water during the design life of the building. Where ‘Grade 3 protection’ is required, and the below ground wall retains more than 600mm, measured from the lowest finished floor level, the waterproofing design should include a combination of two of the Types of waterproofing systems.
Where Grade 2 waterproofing is required to walls retaining ground greater than 600mm, Type A systems that are not fully bonded should only be used as part of a combined system. combined systems include:

• Type A and Type B
• ​Type A and Type C
• ​Type B and Type C

Where there is any doubt about use, Grade 3 protection should be provided. Grade 3 structures built with a Type A and Type B waterproofing system would typically be:

• Storage areas (moisture sensitive goods)
• Electrical plant rooms
• Ventilated residential units and offices
• Restaurants and commercial areas
• Leisure facilities
• Residential areas
• Computer rooms
• Archive Rooms

Grade 2 structures built with a Type A and Type B waterproofing system would typically be:

• Underground car parks
• Plant rooms
• Workshops
• ​Storage areas (moisture unaffected goods)

Warranty

Master Builders Solutions are delighted to offer you the following warranties in line with the different products offering detailed across. Master Builders Solutions have a clear process that all eligible warranties are issued in a timely manner after project completion.

​​​	​Watertight Max Solution Type A and B waterproofing construction in accordance with BS 8102:2009 25 – year warranty with Three lines of defence: MasterSeal 754 pre-applied FPO waterproofing membrane ​MasterLife WP 799 plus MasterInject 900 re-injectable hose waterstop system
​	Watertight Pro Solution Type A and B waterproofing construction in accordance with BS 8102:2009 20 – year warranty with Two lines of defence: MasterSeal 754 pre-applied FPO waterproofing membrane ​MasterLife WP 799 plus MasterSeal 910/912 hydroswelling waterbar
​	​ Watertight Re-injectable Solution Type B waterproofing construction in accordance with BS 8102: 2009 20 – year warranty with Two lines of defence: MasterLife WP 799 Watertight admixture MasterInject 900 re-injectable hose waterstop system with MasterRoc MP 307​​
​	​​ Watertight Solution Type B waterproofing construction in accordance with BS 8102: 2009 15 – year warranty with One line of defence: MasterLife WP 799 plus MasterSeal 910/912 hydroswelling waterbar

Site Support

Master Builders Solutions have a dedicated site services team to support our customer base when working with our watertight product range.

We can be involved in your project at an early stage and we are more than happy to offer technical support with construction joints, pour layouts and aspect ratios which can be discussed with our local team.

We will work in conjunction with your appointed ready-mix supplier to confirm that the watertight concrete mix meets our technical specifications whilst ensuring the addition of our material is carried out within QA guidelines.

For more information on Site Support please contact:
Aaron Myers C.S.S.W
Technical Site Services, Watertight Systems UK
+44 (0)7798 872529
aaron.myers@mbcc-group.com​

Specifications

Water is the most destructive weathering element for concrete, masonry, steel and stone structures, damaging or destroying more buildings and structures than war or natural disasters. Whether above-ground or below ground, all buildings must be able to resist unwanted water in some respect, in the form of rainwater, moisture or hydrostatic pressure. Hydraulic civil structures face yet more challenges in withstanding the ongoing effects of constant immersion.

Good waterproofing, or water resistance, can be the key factor in ensuring a structure’s longevity, yet the importance of this facet of structural design is not always given the attention it warrants. The majority of problems with water ingress occur in a relatively small proportion of a structure’s surface area, often where design details meet. Careful consideration at the design stage can limit cracks, leaks and potentially serious structural damage over a structure’s lifecycle, providing that trades work together at the construction stage to implement design details successfully.

With all this in mind we can offer a specification with a complete range of products to help make your structure BS 8102 compliant.

For more information on our specifications please contact:
Stuart Davidson (C.S.S.W)
Specification Manager, Watertight Systems UK
+44 (0)7917 233229
stuart.davidson@mbcc-group.com