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Basement waterproofing also known as basement tanking is becoming a popular way of gaining extra habitable space within a property without changing the footprint of the building. Basement waterproofing is required when a structure or property, or part of a property, is built at ground level or below. It is likely that there will be a build up of water in the ground surrounding the basement, raising the water table, leading to hydrostatic water pressure. This water pressure is exerted on the floor and walls of the basement and can lead to water penetration through cracks, joints and structural weaknesses in the basement. Without basement tanking this water ingress can then lead to mould, decay, structural problems and other damp related issues.
Basement waterproofing can be achieved in two ways, either by blocking the passage of water into the building with external waterproofing or cementitious waterproofing. Or you can control the ingress and flow of the water to a pre-determined evacuation point by the use of cavity drainage systems.
Cementitious tanking materials are used for basement tanking when there is a requirement to block water ingress into the building. After preparing the surface the basement tanking slurry is applied to the masonry surface in two to three coats depending on the volume of water ingress. The basement tanking slurry then cures to form a water impermeable surface which should then be covered with a render to protect it. By using this basement tanking method the basement remains completely waterproof and the walls remain dry and breathable.
Basement tanking membranes like those manufactured by John Newton and Delta, are designed to control the passage of water using cavity forming membranes, drainage channels and sump and pump water evacuation systems.
Newton Membranes and Delta Membrane come in a wide variety of sizes and types. Some membranes have a mesh welded on the face for direct rendering or for fixing dot and dab plasterboard systems. Other basement tanking and basement waterproofing membranes are plain, designed for flooring or where a wall is to have a dry-lining finish.
Newton Membranes and Delta Membrane both supply drainage options for the collection of water at the foot of the wall and then to control this water into a suitable sump and pump which will then evacuate the water to the outside of the property into a drain or natural drainage point.
When considering basement waterproofing it is essential that you consider every possible option and although the basement may never have flooded previously it is always a possibility, so installing a system that will deal with this eventuality is essential to every basement waterproofing design.
In addition to our large range of basement waterproofing and basement tanking products our technical staff are able to advise you on all aspects of waterproofing and damp proofing for any job large or small.
Permagard are the leading official Newton Membranes stockists as well as Delta Membrane stockists and whether you need a specialist installer in your area or advice about tanking basements, our technical advisors are here to help. Simply call us on 01179 381 596, we are here to help.
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