Internal Type A Waterproofing Products

Type A Waterproofing

British Standard 8102:2022 defines ‘Type A’ waterproofing as “barrier protection”. This barrier protection can be applied to either the external or internal surface of a structure to resist any water that is trying to enter the building.

Internal ‘Type A’ membranes are often the products that are referred to when people talk about the process of “tanking” a basement to protect it from water. Waterproofing barrier membranes that can be applied to the internal ‘negative’ side of the structure include a variety of liquid-applied membranes or slurries that can be installed either by spray machine, trowel, brush, or by roller directly onto the internal wall surface.

These membranes must actively hold back any ingressing water, so it is crucial to select the correct product and to ensure that the substrate is prepared correctly.

Mortars and Plasters

A range of cement-based mortars suitable for where a high depth of repair or levelling to concrete is required, as well as compatible plasters for use with Newton’s range of meshed waterproofing and damp proofing membranes.

Rapid Set and High Strength mortars and plaster

Mortars and plasters are essential ancillaries in the installation of effective waterproofing. For example, our cement-based structural mortar Hydrocoat 203-RM has been instrumental in a wide range of waterproofing projects. Mostly used for durable repairs to concrete structures, it can also be used to repair bridges, floors, footpaths, roads, runways, and decks.

Mortars such as this are also regularly used for concrete levelling where a completely flat and uniform surface is required quickly. With the addition of water, they create a rapid-curing mortar which will set quickly and be safe for foot traffic within hours.

Benefits of using Newton mortars

Hydrocoat 203-RM is a single component, fast setting mortar. It is polymer modified and fibre reinforced with a high adhesion and compressive strength. The mortar can be installed up to 100mm deep, or it can be mixed with sharp sand to create a screed with a maximum depth of 300mm.

Overall, Hydrocoat 203-RM provides the following benefits:

• Strong and durable even at sub-zero temperatures
• High bond strength greater than concrete
• Sets in ten minutes for quick application
• Resistant to 10 bar water pressure
• Non-toxic when cured and suitable for use in reservoirs or other drinking water containment areas
• Resistant to acid gases, chloride ions, and sulphates