Lift pit waterproofing from the inside

A lift pit usually sits below the groundwater or moisture level, so its walls and floor are constantly exposed to water. In most cases it is best waterproofed from the inside: the construction-joint reglets are filled with VANDEX CEMLINE MG 4 repair mortar, and the walls and floor are coated with VANDEX SUPER crystalline waterproofing.

What this solution is for

Internal waterproofing of new or existing concrete lift pits subject to ground moisture or water pressure.

Materials used

• VANDEX SUPER – crystalline waterproofing applied to the interior walls and floor slabs.
• VANDEX CEMLINE MG 4 – fibre-reinforced waterproofing repair mortar for filling the construction-joint reglet.

Application steps

1. Optional: break out a reglet (approx. 30 × 30 mm) along the construction joints with a hammer drill. Fill it with a suitable mortar, preferably VANDEX CEMLINE MG 4, so that it is flush with the surface.
2. Apply two coats of VANDEX SUPER to the pit floor slab surface.
3. Apply two coats of VANDEX SUPER to the interior pit walls.
4. Apply two coats of VANDEX SUPER to the main floor slab surface.

Good to know

• Substrate adhesion strength must be above 1.5 N/mm².
• For consumption and detailed technical data refer to the technical data sheet or consult our advisers.

Why crystalline waterproofing suits work from the inside is explained in the article Waterproofing a basement from the inside.