How To Waterproof A Basement
There are three tried and trusted methods of basement tanking:
Typically the easiest and most affordable option to waterproof a basement. This is the most suitable method if the leaking is not too bad or excavation of the exterior is impossible/impractical. If there are only fine cracks that leak a minimal amount of water your basement could be relatively easily waterproofed. All that could be required is a coat of masonry sealant on to untreated walls. Interior sealants are also effective at reducing humidity and condensation.
However, if previous attempts at sealing the basement have failed or there are large cracks present then other remedies would need to be explored. Namely looking at exterior or drainage methods.
This is the most effective way of basement waterproofing, however, it comes with a fairly large amount of disruption. This means it is a good idea to consult a basement waterproofing specialist although it also means getting to the root of any water ingress.
Exterior waterproofing involves excavation around the exterior of the basement to apply a polymer or membrane and/or install a trench drain underground. This method can be the most costly, but it does ensure a dry basement.
Having properly maintained drainage around your home is essential, even more so if you want to keep moisture from building up in your basement. An interior drainage system is often the most economical method to ensure a waterproof basement. It involves digging a trench along the perimeter of the basement floor for the water to drain down. In some cases a sump pump is also required to carry the water from the inside of the basement to the outside for it to drain away.
The soil outside of your basement will need to be examined to make sure it has the correct properties to drain moisture and not retain it. The ground outside of your basement will also need to slope away from your property. It’s also strongly advisable to seek the advice of a waterproofing specialist for the installation of drainage systems.