Waterproofing and structural repair contractor, Mumbai +91 84528 11175 operations@mabani.in WhatsApp

Application Procedures and Method Statements

How each service is prepared, applied, inspected and recorded.

Method statements by service

These summaries show how we organise each procedure. Every project receives its own method statement for approval.

Please note. Coverage rates, thicknesses, curing times, temperatures, mixing ratios and test durations are not given here. They depend on the product and the project, and must be taken as per the current manufacturer's data sheet and the approved project specification.

HDPE membrane waterproofing

Scope and purpose

To waterproof below-ground structures with a sealed HDPE membrane system.

Suitable applications

  • Rafts and foundations.
  • Retaining and basement walls.

Materials and equipment

  • HDPE membrane and the accessories named in the approved system.
  • Protection boards or layers where specified.
  • Hand tools and the jointing equipment specified by the manufacturer.

Surface preparation

  • Inspect the blinding or substrate for sound, even, clean conditions.
  • Remove protrusions, sharp edges and standing water.

Step-by-step application

  1. Set out the sheets, with the laps in the layout approved.
  2. Install the membrane starting at the lowest or most critical area.
  3. Seal laps and terminations by the manufacturer's method.
  4. Detail corners, penetrations and joints.
  5. Test or inspect laps as specified.
  6. Install the protection layer.

Critical detailing

  • Corners and upstands.
  • Penetrations and joints.
  • Terminations and laps.

Inspection and testing

  • Visual inspection of all laps and terminations.
  • Any test method required by the specification.

Protection and curing

  • Protection layer installed before reinforcement fixing or backfill.

Quality control checklist

  • Lap and seam inspection recorded.
  • Protection layer confirmed.
  • Approved material and batch details recorded.
  • Weather and surface conditions recorded.
  • Inspection signed off before the next stage.

Technical data sheets and safety documentation

Quantities, thicknesses, mixing ratios, curing times and test durations follow the current product data sheet and approved project specification. Project-specific method statements and inspection checklists are issued for approval before work starts.

SBS membrane waterproofing

Scope and purpose

To waterproof slabs and substructure surfaces with an SBS modified bituminous membrane.

Suitable applications

  • Podiums and terraces.
  • Slabs and substructure surfaces where specified.

Materials and equipment

  • SBS membrane and primer named in the approved system.
  • Equipment for the specified application method.

Surface preparation

  • Clean the surface and treat cracks and defects.
  • Confirm the surface condition required by the data sheet.

Step-by-step application

  1. Apply the primer.
  2. Set out the roll layout.
  3. Install the first layer with laps and end laps as specified.
  4. Install further layers if the specification requires.
  5. Detail upstands, drains and penetrations.
  6. Inspect laps and edges, then install the protection layer.

Critical detailing

  • Lap quality.
  • Upstands, drain outlets and penetrations.

Inspection and testing

  • Visual inspection of laps and edges.
  • Water test where the specification requires.

Protection and curing

  • Protection screed or board installed before other trades access the area.

Quality control checklist

  • Primer coverage recorded.
  • Lap and edge inspection recorded.
  • Approved material and batch details recorded.
  • Weather and surface conditions recorded.
  • Inspection signed off before the next stage.

Technical data sheets and safety documentation

Quantities, thicknesses, mixing ratios, curing times and test durations follow the current product data sheet and approved project specification. Project-specific method statements and inspection checklists are issued for approval before work starts.

PU injection grouting

Scope and purpose

To stop or reduce water movement through cracks, joints and voids by injecting PU resin.

Suitable applications

  • Active leaks through cracks and joints.
  • Construction joints and honeycombed areas.

Materials and equipment

  • PU resin and accessories named in the approved system.
  • Injection packers.
  • Injection pump and drilling equipment.

Surface preparation

  • Survey and mark the leaking cracks and joints.
  • Clean the surface around the cracks.

Step-by-step application

  1. Drill holes and fix packers along the crack at the spacing and angle in the method statement.
  2. Flush where the system requires it.
  3. Inject resin from one end and progress along the crack.
  4. Re-inject where resin flow shows voids remain.
  5. Remove packers and make good the surface.
  6. Re-inspect for leakage.

Critical detailing

  • Packer spacing and drilling depth.
  • Order of injection along the crack.

Inspection and testing

  • Visual check for leakage after injection.
  • Re-inspection after a stated period.

Protection and curing

  • Follow the resin data sheet for curing before any further finish is applied.

Quality control checklist

  • Injection record by location.
  • Final leakage check recorded.
  • Approved material and batch details recorded.
  • Weather and surface conditions recorded.
  • Inspection signed off before the next stage.

Technical data sheets and safety documentation

Quantities, thicknesses, mixing ratios, curing times and test durations follow the current product data sheet and approved project specification. Project-specific method statements and inspection checklists are issued for approval before work starts.

UG tank waterproofing

Scope and purpose

To waterproof underground water tanks internally, externally or both, as specified.

Suitable applications

  • Underground potable and fire-water tanks.
  • Other underground storage tanks.

Materials and equipment

  • Waterproofing coating or membrane system named in the specification.
  • Joint and crack treatment materials.

Surface preparation

  • Clean and prepare the surfaces.
  • Repair defects, honeycombing and cracks.

Step-by-step application

  1. Treat construction joints and penetrations.
  2. Apply the specified primer if required.
  3. Apply the waterproofing system.
  4. Allow the cure stated in the data sheet.
  5. Carry out flood testing or the specified check.
  6. Apply protection or finish as specified.

Critical detailing

  • Wall-to-floor junctions.
  • Construction joints and pipe penetrations.

Inspection and testing

  • Flood test or other check as specified.

Protection and curing

  • Curing before filling, as per the data sheet.

Quality control checklist

  • Substrate inspection recorded.
  • Flood test record.
  • Approved material and batch details recorded.
  • Weather and surface conditions recorded.
  • Inspection signed off before the next stage.

Technical data sheets and safety documentation

Quantities, thicknesses, mixing ratios, curing times and test durations follow the current product data sheet and approved project specification. Project-specific method statements and inspection checklists are issued for approval before work starts.

Lift pit waterproofing

Scope and purpose

To waterproof lift pits and treat groundwater ingress.

Suitable applications

  • Lift pits in new construction.
  • Lift pits with active water ingress.

Materials and equipment

  • Waterproofing system named in the specification.
  • PU injection materials where required.

Surface preparation

  • Assess ingress and groundwater conditions.
  • Clean and prepare the surfaces and treat defects.

Step-by-step application

  1. Treat active leaks by PU injection where appropriate.
  2. Treat cracks and joints.
  3. Detail pipe penetrations.
  4. Apply the specified membrane or coating system.
  5. Inspect and test as specified.
  6. Protect the waterproofing.

Critical detailing

  • Wall-to-floor junction.
  • Pipe penetrations and sump.

Inspection and testing

  • Visual inspection.
  • Test as specified.

Protection and curing

  • Protection before lift installation work begins.

Quality control checklist

  • Ingress treatment recorded.
  • Final inspection recorded.
  • Approved material and batch details recorded.
  • Weather and surface conditions recorded.
  • Inspection signed off before the next stage.

Technical data sheets and safety documentation

Quantities, thicknesses, mixing ratios, curing times and test durations follow the current product data sheet and approved project specification. Project-specific method statements and inspection checklists are issued for approval before work starts.

Bathroom waterproofing

Scope and purpose

To waterproof new bathrooms and wet areas beneath tiles.

Suitable applications

  • Bathrooms, toilets and wet rooms.
  • Shower areas.

Materials and equipment

  • Waterproofing system named in the specification.
  • Sealants and reinforcement as specified.

Surface preparation

  • Clean the substrate and check the slopes toward the traps.
  • Repair defects.

Step-by-step application

  1. Treat floor-to-wall junctions.
  2. Treat pipe penetrations and floor traps.
  3. Apply the waterproofing system.
  4. Form the upstand at thresholds.
  5. Test where required.
  6. Protect the layer before tiling.

Critical detailing

  • Floor-to-wall junctions.
  • Pipe penetrations and traps.
  • Upstands and thresholds.

Inspection and testing

  • Flood test where specified and site conditions allow.

Protection and curing

  • Protection layer before tile bedding.

Quality control checklist

  • Slope check recorded.
  • Flood test record where applicable.
  • Approved material and batch details recorded.
  • Weather and surface conditions recorded.
  • Inspection signed off before the next stage.

Technical data sheets and safety documentation

Quantities, thicknesses, mixing ratios, curing times and test durations follow the current product data sheet and approved project specification. Project-specific method statements and inspection checklists are issued for approval before work starts.

Expansion joint treatment using Sikadur-Combiflex

Scope and purpose

To waterproof movement and construction joints using the Sikadur-Combiflex system where specified.

Suitable applications

  • Movement and construction joints in slabs and walls.

Materials and equipment

  • Sikadur-Combiflex tape and adhesive named in the approved system.
  • Joint filler or backer as specified.

Surface preparation

  • Prepare the concrete on both sides of the joint.
  • Remove weak or contaminated material.

Step-by-step application

  1. Apply primer or adhesive as the system requires.
  2. Install the flexible tape.
  3. Form the movement zone as the manufacturer instructs.
  4. Treat the tape edges as the manufacturer instructs.
  5. Inspect the installed tape.
  6. Protect the tape before subsequent work.

Critical detailing

  • Tape edge bonding.
  • Joints, corners and intersections.

Inspection and testing

  • Visual inspection of bonding and edges.

Protection and curing

  • Protection before backfill, screed or traffic.

Quality control checklist

  • Surface preparation inspection recorded.
  • Tape installation inspection recorded.
  • Approved material and batch details recorded.
  • Weather and surface conditions recorded.
  • Inspection signed off before the next stage.

Technical data sheets and safety documentation

Quantities, thicknesses, mixing ratios, curing times and test durations follow the current product data sheet and approved project specification. Project-specific method statements and inspection checklists are issued for approval before work starts.

Swimming pool waterproofing

Scope and purpose

To waterproof reinforced concrete swimming pools beneath the specified finish.

Suitable applications

  • Reinforced concrete pool shells.

Materials and equipment

  • Waterproofing system suitable for permanent immersion and for the specified finish.

Surface preparation

  • Prepare the surface and treat cracks.
  • Detail construction and movement joints.

Step-by-step application

  1. Treat joints and cracks.
  2. Detail lights, inlets, outlets and penetrations.
  3. Apply the waterproofing system.
  4. Test as specified.
  5. Protect before the finish is applied.

Critical detailing

  • Joints.
  • Lights, inlets, outlets and penetrations.

Inspection and testing

  • Water retention or other test as specified.

Protection and curing

  • Protection before finishing.

Quality control checklist

  • Substrate inspection recorded.
  • Test record.
  • Approved material and batch details recorded.
  • Weather and surface conditions recorded.
  • Inspection signed off before the next stage.

Technical data sheets and safety documentation

Quantities, thicknesses, mixing ratios, curing times and test durations follow the current product data sheet and approved project specification. Project-specific method statements and inspection checklists are issued for approval before work starts.

Podium and terrace waterproofing

Scope and purpose

To waterproof exposed, landscaped and traffic-bearing slabs.

Suitable applications

  • Podium slabs and terraces.
  • Balconies and roof decks.

Materials and equipment

  • Waterproofing membrane or coating named in the specification.
  • Protection screed and drainage materials.

Surface preparation

  • Clean the slab and check slopes toward the drains.
  • Repair defects and cracks.

Step-by-step application

  1. Detail drains and rainwater pipes.
  2. Treat upstands and parapet junctions.
  3. Apply the waterproofing system.
  4. Test as specified (for example, a water test).
  5. Install the protection layer or screed.
  6. Install the final finish.

Critical detailing

  • Drains and rainwater pipes.
  • Parapet junctions and upstands.

Inspection and testing

  • Water test where specified.

Protection and curing

  • Protection screed before other trades access the area.

Quality control checklist

  • Slope check recorded.
  • Water test record where applicable.
  • Approved material and batch details recorded.
  • Weather and surface conditions recorded.
  • Inspection signed off before the next stage.

Technical data sheets and safety documentation

Quantities, thicknesses, mixing ratios, curing times and test durations follow the current product data sheet and approved project specification. Project-specific method statements and inspection checklists are issued for approval before work starts.

Structural concrete repairs

Scope and purpose

To repair deteriorated concrete and restore a protected surface.

Suitable applications

  • Spalling and delamination.
  • Corroded reinforcement.

Materials and equipment

  • Repair mortar and protective coating named in the specification.
  • Reinforcement treatment materials where specified.

Surface preparation

  • Mark the repair areas by sounding.
  • Make the area safe and obtain the engineer's instructions where capacity is in question.

Step-by-step application

  1. Remove unsound concrete.
  2. Clean and treat the reinforcement where specified.
  3. Apply bonding material where specified.
  4. Apply the repair mortar.
  5. Repair or inject cracks as appropriate.
  6. Apply the protective coating.

Critical detailing

  • Extent of concrete removal.
  • Reinforcement condition.

Inspection and testing

  • Visual inspection and sounding of the completed repair.

Protection and curing

  • Curing as stated in the mortar data sheet.

Quality control checklist

  • Repair area record with before and after photographs.
  • Approved material and batch details recorded.
  • Weather and surface conditions recorded.
  • Inspection signed off before the next stage.

Technical data sheets and safety documentation

Quantities, thicknesses, mixing ratios, curing times and test durations follow the current product data sheet and approved project specification. Project-specific method statements and inspection checklists are issued for approval before work starts.

Carbon fibre wrapping of columns and beams

Scope and purpose

To strengthen columns and beams using CFRP, to the design approved by the structural engineer.

Suitable applications

  • Columns and beams needing added capacity.

Materials and equipment

  • CFRP fabric, primer and resin named in the approved design and system.

Surface preparation

  • Obtain the engineer's design and approved layout.
  • Prepare the surface and remove weak concrete.
  • Repair and level the substrate.

Step-by-step application

  1. Apply primer.
  2. Apply the resin.
  3. Install the fabric in the specified orientation.
  4. Saturate and consolidate the fabric.
  5. Apply further layers as designed.
  6. Cure and apply the protective finish.

Critical detailing

  • Fibre orientation and number of layers, as designed.
  • Anchorage, if specified.

Inspection and testing

  • Inspection of bonding and consolidation, and any test the engineer requires.

Protection and curing

  • Protect from moisture and damage during cure.

Quality control checklist

  • Engineer's approval recorded.
  • Layer and orientation record.
  • Approved material and batch details recorded.
  • Weather and surface conditions recorded.
  • Inspection signed off before the next stage.

Technical data sheets and safety documentation

Quantities, thicknesses, mixing ratios, curing times and test durations follow the current product data sheet and approved project specification. Project-specific method statements and inspection checklists are issued for approval before work starts.

Epoxy flooring

Scope and purpose

To install epoxy floor systems on prepared concrete.

Suitable applications

  • Industrial and commercial floors.
  • Warehouse floors and utility areas.

Materials and equipment

  • Primer and epoxy system named in the specification.

Surface preparation

  • Grind the surface to the required profile.
  • Check substrate moisture.
  • Treat cracks and joints.

Step-by-step application

  1. Apply the primer.
  2. Apply the epoxy coating or self-levelling layer.
  3. Apply further coats as specified.
  4. Cure.
  5. Final inspection.

Critical detailing

  • Surface profile and moisture.
  • Joint treatment.

Inspection and testing

  • Visual and adhesion checks as specified.

Protection and curing

  • Keep traffic off until cure is complete, as per the data sheet.

Quality control checklist

  • Substrate moisture record.
  • Final inspection record.
  • Approved material and batch details recorded.
  • Weather and surface conditions recorded.
  • Inspection signed off before the next stage.

Technical data sheets and safety documentation

Quantities, thicknesses, mixing ratios, curing times and test durations follow the current product data sheet and approved project specification. Project-specific method statements and inspection checklists are issued for approval before work starts.

STP tank waterproofing

Scope and purpose

To waterproof and line STP tanks and water-retaining structures.

Suitable applications

  • Sewage treatment plant tanks.
  • Concrete water-retaining structures.

Materials and equipment

  • Waterproofing or lining system suitable for the actual exposure, named in the specification.

Surface preparation

  • Clean and prepare the surfaces.
  • Treat cracks and leakage.

Step-by-step application

  1. Treat construction joints and pipe penetrations.
  2. Apply the specified system.
  3. Cure as specified.
  4. Inspect and test as specified.

Critical detailing

  • Joints and penetrations.
  • System suitability for the actual exposure.

Inspection and testing

  • Inspection and leak test as specified.

Protection and curing

  • Curing requirements as specified.

Quality control checklist

  • Substrate record.
  • Test record.
  • Approved material and batch details recorded.
  • Weather and surface conditions recorded.
  • Inspection signed off before the next stage.

Technical data sheets and safety documentation

Quantities, thicknesses, mixing ratios, curing times and test durations follow the current product data sheet and approved project specification. Project-specific method statements and inspection checklists are issued for approval before work starts.

Talk to us about your building

Inspection first, then a written method and quotation.

Request site inspection Call +91 84528 11175 WhatsApp us