Curtain Grouting in South Florida
Curtain grouting builds a new waterproof barrier on the outside of a below-grade wall, from the inside, without digging. It is how we stop widespread seepage in garages, basements and pits.
South FloridaConcrete repair services
Curtain Grouting inSouth Florida
Waterproofing the outside of a wall from the inside
Curtain grouting is a below-grade waterproofing method. We drill a grid of holes through the wall or slab and inject grout into the soil behind it. The grout spreads along the outside face and links up into a continuous “curtain” that keeps groundwater away from the concrete.
It is the right tool when water is not coming from one crack but from an entire area: honeycombed concrete, failed exterior membranes, or walls that seep across their whole face. Sealing each crack from inside would chase the water around. A curtain stops it before it reaches the wall.
We curtain grout with polyurethane, acrylic or bentonite grouts such as CETCO Bentogrout, depending on soil conditions, water pressure and the engineer’s specification.
At a glance
- Best forArea-wide seepage below grade
- MaterialPolyurethane, acrylic or bentonite grout
- Typical locationsGarage walls and floors, basements, elevator pits, tunnels
- DisruptionNo excavation; work done from inside
How it works
Our curtain grouting process
Survey the area
We map the wet areas, the structure and the soil conditions behind it.
Lay out the grid
Injection holes are spaced so each grout bulb overlaps the next.
Drill to the soil
Holes are drilled through the full thickness of the wall or slab.
Inject the curtain
Grout is injected row by row, bottom to top, building the barrier as we go.
Seal and check
Ports are sealed and the area is checked during wet conditions where possible.
Applications
Where we use curtain grouting
- Below-grade garage walls
- Basement and foundation walls
- Elevator pits and machine rooms
- Tunnels and pedestrian passages
- Mechanical and utility rooms
- Planters over occupied space
- Vaults and manholes
- Walls with failed exterior membranes
Warning signs
When to call about curtain grouting
Not sure what you are looking at? Send us a photo or book a site visit and we will tell you what the crack or leak needs.
Seepage over a large area
Damp walls across a wide area rather than at one crack.
Leaks return after crack sealing
Water finds a new path after individual cracks are injected.
Honeycomb concrete
Porous areas from construction let water through the wall itself.
Water at the wall-floor joint
Seepage where the slab meets the wall is common below the water table.
Membrane failure
Exterior waterproofing that can no longer be reached without excavation.
Standing water in pits
Pits that collect water even after pumping many times.
Choosing the right repair
Curtain grouting vs. curtain wall injection
The names are similar, but the work is different. Curtain grouting is below-grade waterproofing: grout injected into the soil behind foundation walls. Curtain wall injection is above-grade leak repair on a building facade, sealing joints and window perimeters. PRS does both.
If you are not sure which one your building needs, describe where the water shows up and we will point you in the right direction.
FAQ
Curtain Grouting questions
What is curtain grouting?
Curtain grouting is a method of waterproofing a below-grade wall by injecting grout through the wall into the soil behind it, forming a continuous waterproof barrier on the outside face.
Do you need to excavate for curtain grouting?
No. All the work is done from inside the structure, which is why curtain grouting is often chosen for garages and basements under buildings, roads or landscaping.
What grout do you use?
We choose polyurethane, acrylic or bentonite grout based on the soil, the water pressure and the engineer’s requirements.
How long does curtain grouting take?
Project time depends on the size of the area and access. Many garage and pit projects are completed in days rather than weeks.
Can curtain grouting be done in an occupied building?
Yes. Work happens from inside the below-grade space with limited areas closed during drilling and injection.
Related services
More ways we protect concrete
Serving Palm Beach County, Broward County, Miami-Dade County.
Free on-site estimate
Get a curtain grouting estimate
Tell us what you are seeing and where. We will inspect the site, explain the repair in plain terms and give you a written estimate at no cost.