Slab Waterproofing Guide

Concrete slabs are used beneath homes, sheds, garages, commercial buildings, basements, balconies, roof decks, patios, and occupied spaces. Although concrete is strong and durable, it is not automatically waterproof.

A concrete slab contains pores and capillary pathways that can allow water or moisture vapor to move through the material. Water may also enter through cracks, construction joints, plumbing penetrations, slab edges, wall connections, and damaged waterproofing.

Effective slab waterproofing requires more than applying paint over the top of the concrete. The right solution depends on where the water originates, how the slab is used, and whether the concrete is new or existing.

A complete system may include:

• Waterproofing under the concrete slab
• An integral waterproofing additive
• A concrete slab waterproofing membrane
• Crack and joint treatments
• Slab-edge protection
• Wall-to-slab waterproofing
• Bottom-plate protection
• Surface-applied coatings or sealers
• Drainage and vapor control
• A protective floor or roof finish

Waterproofing a basement slab against groundwater requires a different approach from waterproofing a concrete slab roof or an elevated slab over occupied space. A shed slab also needs different details from a tiled balcony or commercial roof deck.

Rebotec USA supplies mineral-based waterproofing products for concrete and mortar used in residential, commercial, and industrial construction. For help evaluating concrete slab waterproofing products for a new slab, repair, wall connection, topping, or compatible cementitious surface, call Rebotec USA at +1 469-352-3379.

What Is Slab Waterproofing?

Slab waterproofing is the process of reducing or preventing water from moving through, around, or across a concrete slab.

Waterproofing may be installed:

• Beneath the slab
• Within the concrete
• On top of the slab
• At the slab edges
• At wall-to-slab connections
• Around pipes and drains
• At construction and expansion joints

The purpose may be to:

• Reduce groundwater intrusion
• Control moisture vapor
• Protect flooring
• Prevent leaks into rooms below
• Keep wood framing away from moisture
• Protect reinforcing steel
• Reduce staining and deterioration
• Waterproof a roof or balcony slab
• Protect a shed, garage, or commercial structure

The most dependable systems treat the slab as part of the complete building assembly rather than an isolated concrete surface.

Is a Concrete Slab Waterproof?

Standard concrete is not completely waterproof.

Even well-placed concrete may contain:

• Microscopic pores
• Capillary pathways
• Shrinkage cracks
• Construction joints
• Control joints
• Voids
• Honeycombing
• Plumbing penetrations
• Surface damage

Concrete may resist water for a period of time, but prolonged contact, pressure, cracks, and poor drainage can allow moisture to move through it.

A dense, properly cured slab usually performs better than poorly placed concrete. However, concrete quality alone should not replace a designed waterproofing or vapor-control system when the project requires one.

Where Water Enters a Concrete Slab

Water can reach a slab from above, below, or around its edges.

Water From Below

Moisture may rise through the slab because of:

• Wet soil
• High groundwater
• Missing vapor barrier
• Damaged under-slab membrane
• Poor drainage
• Plumbing leaks below the slab
• Capillary movement
• Hydrostatic pressure

This moisture may cause:

• Damp flooring
• Mold beneath finished floors
• Efflorescence
• Peeling paint
• Blistered epoxy
• Warped wood flooring
• Loose vinyl
• Musty odors

Water From Above

A slab may be exposed to water from:

• Rain
• Roof runoff
• Showers
• Balconies
• Roof decks
• Cleaning
• Equipment leaks
• Pools
• Planters
• Plumbing failures

When the slab is located over occupied space, a top-side waterproofing membrane is usually needed to stop water before it enters the concrete.

Water Through Slab Edges

Water may enter where the concrete meets:

• Exterior soil
• Walls
• Door thresholds
• Sill plates
• Masonry
• Foundation walls
• Other concrete placements

Slab-edge waterproofing is especially important when the interior floor is near exterior grade.

Water Through Cracks and Joints

Common pathways include:

• Shrinkage cracks
• Construction joints
• Expansion joints
• Saw-cut control joints
• Wall-to-floor joints
• Cold joints
• Pipe penetrations

A waterproof coating across the open slab may still fail if these details remain untreated.

Waterproofing Under a Concrete Slab

Waterproofing under a concrete slab is most practical during new construction, before the concrete is placed.

A typical under-slab assembly may include:

1. Properly prepared soil
2. Compacted subgrade
3. Drainage aggregate
4. Vapor barrier or waterproof membrane
5. Sealed seams
6. Sealed pipe penetrations
7. Reinforcement
8. Concrete slab
9. Integral waterproofing when specified
10. Proper curing

Under-Slab Vapor Barrier vs Waterproofing Membrane

A vapor barrier is primarily designed to reduce water-vapor movement.

A waterproofing membrane may be designed to stop liquid water and withstand greater pressure.

The right product depends on:

• Groundwater conditions
• Building use
• Soil moisture
• Flooring requirements
• Hydrostatic pressure
• Local construction requirements
• Whether the structure is below grade

A warehouse slab with moisture-sensitive flooring may need strong vapor control even when standing groundwater is not present.

A basement or underground structure may require a more complete waterproofing system.

Sealing Under-Slab Membrane Seams

The membrane should remain continuous across:

• Overlaps
• Pipe penetrations
• Footing transitions
• Columns
• Pits
• Changes in elevation
• Repairs or punctures

Tears and open seams should be repaired before the concrete is poured.

Once the slab is placed, defects beneath it become difficult to reach.

Protecting the Under-Slab Membrane

Construction traffic, reinforcing steel, sharp aggregate, and tools can puncture the membrane.

Protection may involve:

• Careful installation
• Compatible repair tape
• Protective layers
• Organized reinforcement placement
• Final inspection before the pour

A membrane should be inspected immediately before concrete placement.

Integral Concrete Slab Waterproofing

Integral waterproofing is incorporated into fresh concrete, mortar, grout, or compatible cementitious materials.

Rebotec Admix Powder is a mineral-based product designed to help create hydrophobic properties throughout the cured material.

Integral waterproofing may be considered for compatible:

• Basement slabs
• Garage slabs
• Commercial floors
• Roof slabs
• Balconies
• Retaining structures
• Concrete toppings
• Shed slabs
• Repairs
• Underground construction

Because the waterproofing is distributed throughout the cementitious material, it does not depend only on a surface film.

However, integral waterproofing does not replace:

• Under-slab membranes
• Vapor barriers
• Drainage
• Waterstops
• Crack-control reinforcement
• Joint treatment
• Proper concrete placement
• Consolidation
• Curing
• Surface membranes when required

It should be considered one part of the complete slab-waterproofing design.

Waterproofing Membrane for a Concrete Slab

A waterproofing membrane for a concrete slab creates a continuous barrier over or beneath the concrete.

Common membrane types include:

• Liquid-applied membranes
• Sheet membranes
• Self-adhered membranes
• Cementitious membranes
• Rubberized membranes
• Polyurethane systems
• Acrylic systems
• Bituminous membranes
• Thermoplastic sheets

The membrane must be compatible with the concrete and with any flooring, tile, topping, insulation, or coating installed over it.

Liquid-Applied Concrete Slab Waterproofing Membrane

A liquid membrane may be applied using a:

• Roller
• Brush
• Sprayer
• Trowel
• Squeegee

After curing, it forms a continuous layer.

Potential benefits include:

• Few seams
• Coverage around irregular shapes
• Easier detailing around some penetrations
• Application over complex slabs
• Multiple flexible system options

Potential limitations include:

• Field-controlled thickness
• Pinholes
• Missed areas
• Uneven coverage
• Weather-sensitive curing
• Primer requirements
• Damage before protection is installed

The installer should follow the required wet-film and dry-film thickness rather than estimating visually.

Sheet Waterproof Membrane for Concrete Slabs

Sheet membranes are manufactured in rolls or panels.

Potential benefits include:

• Consistent thickness
• Predictable material properties
• Strong liquid-water barrier
• Visible installation coverage

Potential challenges include:

• Seams
• Wrinkles
• Corners
• Penetrations
• Overlaps
• Surface irregularities
• Punctures
• Terminations

A sheet membrane is only as dependable as its seams, edges, and transitions.

Cementitious Slab Waterproofing

Cementitious waterproofing products bond to compatible concrete and masonry.

They may be used for:

• Basement slabs
• Bathrooms
• Mechanical rooms
• Tanks
• Balconies
• Roof slabs
• Concrete repairs
• Existing cementitious surfaces

Potential benefits include:

• Strong compatibility with concrete
• Application to certain damp surfaces
• Ability to fill pores
• Mineral-based construction
• Brush or trowel installation

Some cementitious products are rigid and may crack when the slab moves. Flexible treatment may still be required at joints and active cracks.

How to Waterproof a Concrete Slab

The correct process depends on whether the slab is new or existing and whether water comes from above or below.

A general process for waterproofing an existing slab includes the following steps.

Step 1: Identify the Water Source

Determine whether moisture comes from:

• Groundwater
• Rain
• Plumbing
• A leaking roof or wall
• Condensation
• Wet soil
• Floor drains
• Slab cracks
• Wall-to-slab joints
• Exterior grade

Do not assume the visible damp spot is the original entry point.

Step 2: Inspect the Slab

Look for:

• Cracks
• Spalling
• Settlement
• Uneven areas
• Efflorescence
• Damp spots
• Failed coatings
• Oil or contamination
• Open joints
• Rust stains
• Structural movement

Large, widening, displaced, or recurring cracks may require professional evaluation.

Step 3: Test Moisture When Necessary

Moisture testing may be important before installing:

• Epoxy
• Polyurethane
• Vinyl flooring
• Wood flooring
• Dense membranes
• Adhesives
• Other moisture-sensitive finishes

A slab can appear dry while still releasing moisture vapor.

Step 4: Correct Drainage Problems

Possible improvements include:

• Correcting exterior grade
• Extending downspouts
• Repairing foundation drains
• Redirecting irrigation
• Improving roof drainage
• Installing a sump system
• Correcting ponding
• Repairing plumbing leaks

A coating should not be expected to overcome uncontrolled water pressure.

Step 5: Remove Failed Materials

Remove:

• Loose paint
• Peeling sealer
• Adhesive residue
• Weak concrete
• Unstable patches
• Dirt
• Oil
• Efflorescence

The waterproofing must bond to a sound, compatible surface.

Step 6: Repair Cracks and Joints

Possible treatments include:

• Cementitious repair mortar
• Epoxy
• Polyurethane
• Flexible joint sealant
• Crack-bridging membrane
• Reinforcing fabric
• Injection materials

The repair method should match whether the opening is stable, moving, dry, or leaking.

Step 7: Detail Penetrations and Transitions

Special attention may be required at:

• Pipes
• Drains
• Columns
• Curbs
• Door thresholds
• Wall-to-slab joints
• Slab edges
• Changes in elevation

Step 8: Prepare the Surface

Preparation may include:

• Grinding
• Shot blasting
• Pressure washing
• Abrasive cleaning
• Vacuuming
• Degreasing
• Surface drying or conditioning

The required surface profile depends on the waterproofing product.

Step 9: Apply Primer if Required

The primer should be approved for:

• The concrete
• Existing moisture
• Waterproofing membrane
• Planned finish
• Interior or exterior conditions

Step 10: Install the Waterproofing

Follow the required:

• Coverage rate
• Membrane thickness
• Number of coats
• Seam overlap
• Temperature
• Humidity
• Recoat time
• Cure time

Step 11: Inspect and Test

Check for:

• Pinholes
• Bubbles
• Thin areas
• Open seams
• Unsealed penetrations
• Incomplete transitions
• Punctures

The system should be tested before it is covered whenever practical.

Step 12: Protect the Membrane

Protection may include:

• Tile
• Concrete topping
• Pavers
• Flooring
• Insulation
• Protection board
• Traffic coating
• UV-resistant topcoat

Waterproofing an Existing Concrete Slab

Waterproofing an existing concrete slab is more challenging because the area beneath the slab may be inaccessible.

Possible solutions include:

• Penetrating sealer
• Surface-applied mineral coating
• Cementitious waterproofing
• Liquid membrane
• Sheet membrane
• Crack injection
• Joint treatment
• Interior drainage
• Sump pump
• Moisture-mitigation coating

The right method depends heavily on the water direction.

Moisture Coming From Above

A top-side membrane may be effective for:

• Bathrooms
• Balconies
• Roof decks
• Patios over occupied space
• Mechanical rooms
• Washdown areas

Moisture Coming From Below

A surface coating may face negative-side pressure when groundwater pushes upward.

This pressure can cause:

• Blistering
• Peeling
• Bubbles
• Delamination
• White mineral deposits
• Adhesive failure

When groundwater is significant, drainage or pressure relief may be more important than surface coating alone.

Waterproofing a Wall on a Concrete Slab

Walls built on concrete slabs require careful attention where the vertical wall meets the horizontal concrete.

Water may enter through:

• The wall-to-slab joint
• Exterior siding
• Masonry
• Door openings
• Slab edges
• Poor flashing
• High exterior grade
• Failed sealant

A wall-on-slab waterproofing detail may include:

• Capillary break
• Sill gasket
• Flashing
• Compatible sealant
• Liquid membrane
• Raised curb
• Exterior drainage
• Waterproof sheathing transition
• Slab-edge membrane

The detail should direct water outside rather than trapping it inside the wall assembly.

Waterproofing the Bottom Plate to a Concrete Slab

The bottom plate, also called the sill or sole plate, is the horizontal framing member attached to the slab.

When wood sits directly against damp concrete, it may absorb moisture.

Possible protection methods include:

• Pressure-treated lumber where required
• Sill gasket
• Capillary-break membrane
• Compatible sealant
• Flashing
• Raised curb
• Anchoring details that preserve the moisture barrier

The correct method depends on whether the wall is interior, exterior, structural, or part of a shed or other accessory building.

A surface coating around the plate should not trap existing moisture in wood or hide decay.

Shed on Concrete Slab Waterproofing

A shed built on a concrete slab may develop moisture problems when the slab is larger than the shed footprint, close to exterior grade, or missing a capillary break beneath the walls.

Water may enter because:

• Rain lands on exposed slab edges
• The slab slopes toward the shed
• Water collects around the perimeter
• The wall plate sits directly on concrete
• Exterior siding terminates too low
• No under-slab vapor barrier was installed
• Sealant has failed around the bottom plate
• Door thresholds allow water inside

How to Waterproof a Shed on a Concrete Slab

A practical shed waterproofing plan may include:

1. Check the slab slope.
2. Confirm that water drains away from the shed.
3. Keep soil and mulch below the wall materials.
4. Seal appropriate wall-to-slab gaps.
5. Install or repair exterior flashing.
6. Protect the bottom plate with a capillary break.
7. Improve door-threshold details.
8. Seal cracks in the slab.
9. Consider a compatible interior slab sealer.
10. Correct gutters or roof runoff.

If the slab extends beyond the walls, an exterior coating alone may not stop water that continually collects against the bottom plate.

Drainage and flashing should be corrected first.

Waterproofing a Concrete Slab Roof

A concrete slab roof must resist rain, sunlight, temperature changes, movement, and possible ponding water.

Concrete roof waterproofing may include:

• Integral waterproofing
• Crack repair
• Slope correction
• Liquid membrane
• Sheet membrane
• Cementitious coating
• Parapet waterproofing
• Drain and scupper details
• Protective topcoat
• Traffic surface

Important areas include:

• Roof drains
• Scuppers
• Parapets
• Expansion joints
• Pipe penetrations
• Equipment curbs
• Wall transitions
• Roof edges

A roof slab may appear flat, but it should direct water toward drainage outlets.

A membrane should not be expected to compensate indefinitely for clogged drains or severe ponding.

Waterproofing a Concrete Slab Over Occupied Space

A concrete slab over occupied space may be used as:

• Balcony
• Terrace
• Roof deck
• Podium deck
• Plaza
• Elevated walkway
• Patio

This type of slab requires positive-side waterproofing on the top surface so water is stopped before it enters the concrete and the rooms below.

A complete system may include:

1. Proper structural slab
2. Correct slope
3. Crack and joint repair
4. Waterproofing membrane
5. Drain and scupper details
6. Wall and threshold transitions
7. Protection layer
8. Traffic coating, pavers, tile, or topping
9. Testing before covering

Critical details include:

• Door thresholds
• Railings
• Planters
• Drains
• Parapets
• Expansion joints
• Slab edges
• Wall transitions

Tile and grout should not be treated as the primary waterproofing layer.

Concrete Slab Waterproofing Products

Concrete slab waterproofing products include:

• Integral admixtures
• Penetrating sealers
• Mineral-based coatings
• Cementitious membranes
• Liquid polyurethane membranes
• Acrylic membranes
• Rubberized coatings
• Sheet membranes
• Vapor barriers
• Waterstops
• Crack-repair products
• Joint sealants
• Reinforcing fabrics

The best product depends on:

• New or existing concrete
• Water direction
• Water pressure
• Interior or exterior location
• Structural movement
• Planned flooring or finish
• Foot or vehicle traffic
• UV exposure
• Soil contact
• Chemical exposure
• Cure time

Rebotec Products for Concrete and Mortar

Rebotec Admix Powder is intended for use in compatible new concrete, mortar, grout, and cementitious repair materials to help create hydrophobic properties throughout the cured material.

Rebotec Paint is a surface-applied mineral-based hydrophobic waterproofing product for compatible concrete and masonry surfaces.

Product selection should be based on the slab condition, water exposure, finish, application method, and project requirements.

Penetrating Sealer vs Slab Waterproofing Membrane

A penetrating sealer and a waterproof membrane serve different purposes.

Penetrating Concrete Sealer

Potential benefits include:

• Preserves the natural concrete appearance
• Reduces surface absorption
• Is less likely to peel
• May allow greater vapor movement
• Provides minimal surface buildup

Potential limitations include:

• Does not bridge cracks
• Does not create a complete barrier across joints
• May not stop water under pressure
• Does not correct drainage

Concrete Slab Waterproofing Membrane

Potential benefits include:

• Creates more continuous protection
• Covers the surface and selected repaired cracks
• Can connect to drains and walls
• May resist stronger liquid-water exposure
• Can be installed beneath finishes

Potential limitations include:

• Depends on adhesion or seam quality
• May be punctured
• Requires detailed preparation
• May trap moisture
• Can fail under unaddressed negative-side pressure

Common Slab Waterproofing Mistakes

Avoid these frequent mistakes:

• Applying paint without finding the water source
• Ignoring groundwater
• Installing a coating over efflorescence
• Failing to test slab moisture
• Applying a membrane too thin
• Leaving sheet seams open
• Ignoring slab edges
• Failing to seal pipe penetrations
• Coating over loose material
• Covering structural cracks
• Ignoring wall-to-slab transitions
• Allowing exterior grade to remain too high
• Setting untreated wood directly on damp concrete
• Covering the membrane before testing
• Assuming concrete is naturally waterproof
• Expecting integral waterproofing to replace joints and drainage

When Slab Waterproofing Is Not Enough

A surface product may not solve:

• High groundwater
• Repeated flooding
• Severe slab settlement
• Large structural cracks
• Failed foundation drains
• Plumbing leaks beneath the slab
• Sewer backups
• Major roof-deck movement
• Poorly designed drainage
• Severely deteriorated concrete

The project may require:

• Interior drainage
• Sump pump
• Exterior drainage
• Slab repair
• Plumbing work
• Structural evaluation
• Roof reconstruction
• Replacement of damaged concrete

Get Help Choosing Concrete Slab Waterproofing Products

Choosing among slab waterproofing products, membranes, coatings, penetrating sealers, and integral additives can be difficult.

The correct solution must match the concrete, water source, pressure, joints, slab location, planned finish, and construction details.

Rebotec USA helps contractors, builders, distributors, engineers, and property owners evaluate mineral-based waterproofing products for concrete and mortar.

Rebotec products may be considered for compatible:

• Basement slabs
• Shed slabs
• Garage floors
• Roof slabs
• Balconies
• Concrete toppings
• New concrete
• Mortar
• Concrete repairs
• Commercial structures

Call Rebotec USA at +1 469-352-3379 for product information and guidance related to a concrete or mortar waterproofing project.

Conclusion

Slab waterproofing protects concrete floors, foundations, roofs, balconies, sheds, and occupied spaces from water and moisture-related damage.

A slab may need waterproofing beneath the concrete, within the concrete mix, on the surface, or at all three levels.

Waterproofing under a concrete slab may include drainage aggregate and a sealed vapor barrier or waterproof membrane. Integral waterproofing may be incorporated into new concrete or mortar to improve water resistance throughout the material.

Existing concrete slabs may require crack repair, joint treatment, surface preparation, moisture testing, drainage, and a compatible surface-applied membrane or coating.

The correct system depends on whether the water comes from above or below. Positive-side waterproofing is generally preferred because it stops water before it enters the concrete. Surface coatings may fail when significant groundwater pressure pushes upward from beneath the slab.

Wall-to-slab joints, bottom plates, slab edges, pipes, drains, door thresholds, and construction joints require careful treatment. A waterproofed open surface can still leak when one of these details is incomplete.

Shed on concrete slab waterproofing should include slope, flashing, grade clearance, capillary protection beneath the bottom plate, crack repair, and control of roof runoff.

Concrete slab roofs and slabs over occupied spaces require continuous membranes, drainage, wall transitions, penetrations, and testing before the waterproofing is covered.

For help evaluating mineral-based concrete slab waterproofing products for concrete or mortar, call Rebotec USA at +1 469-352-3379.

FAQs About Slab Waterproofing

What is slab waterproofing?

Slab waterproofing is the process of reducing or preventing water from passing through, beneath, around, or across a concrete slab.

Is a concrete slab naturally waterproof?

No. Standard concrete contains pores and may develop cracks, joints, and voids that allow moisture to pass through.

How do you waterproof a concrete slab?

The process may include drainage, an under-slab membrane, integral waterproofing, crack repair, joint treatment, and a surface-applied membrane or sealer.

What is the best waterproofing for a concrete slab?

The best system depends on whether the slab is new or existing, where the water originates, the amount of pressure, and the planned use or finish.

What is a concrete slab waterproofing membrane?

It is a liquid- or sheet-applied barrier installed beneath or over a slab to help prevent water from moving through the assembly.

Can waterproofing be installed under a concrete slab?

Yes. New construction may include a sealed vapor barrier or waterproofing membrane beneath the concrete.

Is an under-slab vapor barrier waterproof?

A vapor barrier primarily controls vapor. Some products may also resist liquid water, but the required performance depends on the system and groundwater conditions.

Can an existing concrete slab be waterproofed?

Yes. Possible methods include surface membranes, cementitious coatings, mineral-based products, penetrating sealers, crack repair, and drainage.

Can a coating stop groundwater from rising through a slab?

Some specialized products may resist limited negative-side pressure, but significant groundwater often requires drainage or pressure relief.

Why is water coming through my concrete slab?

Possible causes include groundwater, wet soil, cracks, missing vapor barriers, failed drains, plumbing leaks, or water entering at slab edges.

What is integral slab waterproofing?

Integral waterproofing is added to fresh concrete or mortar to improve water resistance throughout the cementitious material.

Does integral waterproofing replace an under-slab membrane?

Not necessarily. Under-slab vapor barriers, drainage, joints, and surface membranes may still be required.

How do you waterproof a shed on a concrete slab?

Correct the slope and drainage, protect the bottom plate, seal suitable wall-to-slab gaps, repair cracks, improve flashing, and control roof runoff.

How do you waterproof the bottom plate to a concrete slab?

Possible methods include a sill gasket, capillary-break membrane, pressure-treated plate where required, compatible sealant, flashing, or a raised curb.

Can I seal around the bottom of a shed?

Yes, but sealant alone may not solve water caused by poor slope, high soil, exposed slab edges, or failed flashing.

How do you waterproof a wall built on a slab?

Use appropriate slab-edge waterproofing, flashing, capillary breaks, sealants, siding clearances, and drainage details.

How do you waterproof a concrete slab roof?

Repair cracks, correct drainage, prepare the surface, detail penetrations and walls, and install a roof-rated membrane with suitable protection.

How do you waterproof a slab over occupied space?

Install a positive-side membrane over the slab and detail drains, walls, thresholds, penetrations, joints, and edges before adding the wearing surface.

Is tile enough to waterproof a concrete slab?

No. Tile and grout are not usually the primary waterproofing layer. A membrane is generally required beneath the finish in wet areas.

Can a penetrating sealer waterproof a slab?

It may reduce water absorption, but it does not bridge cracks or create a continuous barrier across joints and penetrations.

Can epoxy waterproof a concrete slab?

Epoxy can create a dense surface coating, but moisture from below may cause it to blister or peel. Slab moisture should be evaluated first.

Should cracks be repaired before slab waterproofing?

Yes. Cracks should be evaluated and repaired using a method suited to their width, movement, and water exposure.

How are pipes through a concrete slab waterproofed?

Penetrations may require compatible sealants, collars, boots, waterstops, reinforcing fabric, or additional membrane.

Should a slab membrane be tested before it is covered?

Yes, when the system and site conditions allow. Testing makes defects easier to locate and repair.

Who can help me choose slab waterproofing products?

Rebotec USA can help evaluate mineral-based waterproofing products for concrete and mortar. Call +1 469-352-3379 for product and application guidance.