Let dry before proceeding.
How to waterproof poured concrete walls.
Mix the parging material per the manufacturer s directions and use a trowel to apply the parging directly to the exterior of the masonry or rough surface wall creating a smooth even plane.
Drylok is an interior latex paint that serves double duty as a waterproofing agent for previously uncoated concrete masonry or cinder block basement walls.
Extend waterproofing at least 12 inches onto intersecting walls that don t have to be waterproofed.
Seal the entire concrete wall with a waterproof masonry.
It can also develop small pinhole openings that act as capillaries for water transmission.
Most membranes like a clean surface to adhere to.
For example a poured concrete foundation can admit water through patches of porous concrete or over the top of the foundation wall.
Allow the parging to dry per manufacturer s recommendations prior to applying the damp proof coating.
In case a hairline crack was not fixed in the previous step with hydraulic cement it will be covered in this procedure.
If you re sealing an indoor area use the paintbrush to apply sealant to the floor along the edges of the walls.
Waterproof any foundation wall that has earth on one side and usable space on the other including crawl spaces.
When deciding what walls get waterproofed follow this basic rule.
This can be prevented or stopped by applying an exterior waterproofing membrane to the foundation wall.
Concrete is a porous material when fully cured.
Apply a coat of cement based sealant to all exterior walls.
With a stiff brush some tsp trisodium phosphate and some water wash away any loose material oil or dirt still clinging to the concrete.
Thoroughly clean the surface of your concrete before waterproofing.
That way you ll avoid touching the walls with the roller in the next step.
Cement based sealants are easy to apply and can be used over concrete and masonry surfaces.
This type of sealant will harden and will close the concrete pores.
Depending on the porosity of your concrete a gallon of waterproofer can cover 250 square feet.