Underground sump waterproofing
An underground sump can lose water through cracks, or let groundwater seep in and spoil what you store. Either way you are paying for water you cannot use. We seal the sump so it holds what you put in.
Signs you need it
- Sump level drops faster than you use water
- Damp walls or wet soil around the sump
- Water that tastes or smells earthy
- Visible cracks or white deposits on the sump walls
Common causes
- Cracks from ground movement or poor concrete
- Leaking construction joints
- Worn-out internal coating
How we do it
- Pump out and clean the sump
- Locate and repair cracks and joints
- Apply the waterproofing coats
- Cure, refill and check the level over the next days
Two-coat system: Zydex Nano chemical first, then a complementary chemical. We confirm the exact products on your quote.
Get a free inspection
Free site inspection. Tell us where it leaks and we will tell you the cause and the fix.
Questions
How long will the sump be out of use?
We give you a schedule with the quote. Cleaning, repair and curing take time, so plan your water supply for that window and ask us what to expect.