5 Foundation Waterproofing Methods

It is essential to use a foundation waterproofing method to help prevent the need for sump pump water removal or having to carry out rectification work because mold damage. Being aware of the different methods of foundation waterproofing will help you to determine which one is best for your requirements.  

Rubber Membrane

Using rubber as a method of foundation waterproofing is ideal as it is not only effective but is also eco-friendly as it contains no toxic substances and does not cause damage to surrounding property. It can be applied to both the internal and external surfaces of the foundation in order to prevent the ingress of not only water, but also of air and insects. It is a convenient method to use as it can be applied by spraying or painting it onto the surface and doesn’t require any priming. The result will be sufficiently flexible to maintain its ability with movement.

Bentonite

The clay-like substance of bentonite is a good material to use as foundation waterproofing due to the qualities that it has. It absorbs water until it expands to its full capacity and seals any cracks and holes that are present. It is able to take in a significant amount of water and creates a permanent seal once it has had its fill. The panels that are formed from the material can be hammered or stuck into place and it can be combined with butyl rubber to create a sheeting method that is effective against water ingress. It is non-toxic so it is safe to use and will not cause damage to surrounding property and can prove easy to apply.   

Cement

Cement products are probably one of the most popular ways to effect foundation waterproofing because it is relatively cheap and readily available. The substances are easy to mix and can be applied with a brush. An acrylic solution can be added to the cement to make it better at bonding with the surface and create a more resilient coating. However, cement is rigid and unyielding so can crack when subject to the small movements that are normal for buildings.   

Asphalt

Rubberized sheets of asphalt membrane can be used as foundation waterproofing. They are made more convenient by being manufactured in a self-adhesive manner so that it can be fixed into place after removing a protective film. You need to have some confidence when using this method as it takes some skill to do it correctly. Once it is stuck to the surface that is where it is staying so it needs to be done correctly first time. Wrinkles and air pockets can only be rectified by cutting the defective section of the membrane and smoothing it out, and holes must be covered over with an additional piece of membrane. It cannot be lifted and replaced.    

Tar

Liquid tar can be applied to the surface in order to create a waterproof barrier. It is sufficiently thick and sticky to be able to add sheets of felt or other similar material to it in order to build up layers to ensure that water cannot pass through.