INTERNAL WATERPROOFING
WHAT IS it?
Internal waterproofing is an alternative solution that addresses basement leaks and flooding. This is a more cost-effective solution than the exterior waterproofing, and it is usually used when the access to the exterior of the house is limited or not possible.
This process is done from the inside of the house, and it involves digging a trench around the perimeter of the cement floor beside the walls, and installing a drainage system of weeping tile. Leading the water that comes in, through this system and into a sump pump. This pump then leads the water back to the outside of the house.
The aim is to protect the inside of the basement, and it makes sure that the water, that would otherwise be stagnant against the foundation of the house, flows away. This process will still allow you to install drywall over the walls and have a fully finished, esthetic, and (most importantly) dry basement.
The process
The foundation of the house is exposed from the inside by removing the drywall and insulation (if there is any).
cracks and pinholes are repaired and covered by a thick layer of cement.
A trench is dug around the concrete perimeter of the basement.
The dimpled waterproofing drainage membrane is applied to the whole wall and fastened with concrete nails and washers.
The weeping tile system is installed in the trench and if it is needed, a special sump pump is installed and connected to it.
This is all topped off with gravel to further help with drainage, and it is covered seamlessly with cement.
After this everything is cleaned up and the basement is ready for insulation and drywall.