Mumbai is home to thousands of residential buildings, commercial properties, housing societies, offices and other structures that require regular inspection, maintenance and repair. The city’s climatic conditions, heavy monsoon rainfall, humidity, coastal environment and continuous exposure to changing weather conditions can gradually affect different parts of a building.

Cracks in walls, damaged plaster, water seepage, leakage, corrosion, deteriorated concrete, damaged external surfaces and plumbing problems are some of the issues that property owners and housing societies may encounter over the life of a building.

Selecting an experienced Building Repair Company in Mumbai is therefore important when a property requires professional assessment, repair, restoration or maintenance.

DPCON Engineers India Pvt. Ltd., through dpconindia.com, provides a range of building repair, restoration and related construction services in Mumbai. The company’s services cover building repair and restoration, waterproofing, painting, structural repair-related work, surveys, core cutting, plumbing, façade services, fabrication and several other property maintenance requirements.

Whether the requirement involves an individual repair activity or a combination of restoration works, proper inspection, planning, surface preparation, material selection and execution are important for achieving a reliable result.

This guide explains the major types of repairs in construction, common building problems, repair processes and the services that may form part of a comprehensive building repair project.

What Is Building Repair?

Building repair refers to work carried out to rectify damaged, deteriorated or defective portions of a building.

Repair requirements can range from relatively small issues such as wall cracks and damaged plaster to more substantial work involving concrete deterioration, reinforcement corrosion, structural members, external façades, terraces and waterproofing systems.

The objective of a repair depends on the condition of the building.

Some repairs are primarily intended to restore the appearance or finish of a surface. Others are performed to address water ingress, deterioration or damage that can affect the performance of building components.

For this reason, the repair method should be selected according to the actual problem rather than applying the same treatment to every defect.

Professional building repair normally begins with an inspection.

The affected areas are identified and the nature and extent of deterioration are evaluated. Based on the findings, an appropriate repair methodology can be developed.

Types of Repairs in Construction

There are several types of repairs that may be required during the life of a building. The exact scope depends on factors such as building age, construction quality, exposure conditions, maintenance history, water ingress and the condition of individual building elements.

The major types of building repairs include the following.

1. Structural Repair Concrete Repair

Structural and concrete repair involves restoring damaged or deteriorated building components such as columns, beams, slabs, RCC members, load-bearing elements, and other concrete sections.

Common signs of deterioration may include cracks, spalling, delamination, exposed reinforcement, rusting, loose concrete, or loss of surface material.

Before starting the repair, the cause and extent of the damage should be properly assessed. Depending on the condition, the work may include removal of deteriorated concrete, cleaning of affected areas, treatment of reinforcement, application of suitable bonding or repair materials, restoration of concrete sections, and strengthening of structural members where required.

The repair method should always be selected based on the actual site condition and technical recommendations.

2. RCC Repair

Reinforced Cement Concrete, commonly called RCC, is extensively used in building construction.

Over time, RCC surfaces can develop deterioration due to moisture ingress, corrosion of reinforcement, cracks, environmental exposure, inadequate maintenance or other causes.

Signs that may indicate RCC deterioration include:

·         Concrete cracking

·         Loose concrete

·         Surface deterioration

·         Exposed reinforcement

·         Rust staining

·         Spalling

·         Damaged edges

·         Deteriorated beam or column surfaces

RCC repair requires careful investigation because simply covering deteriorated concrete with plaster or paint may not address the underlying problem.

Loose or unsound material may first need to be identified and removed. The condition of reinforcement and surrounding concrete can then be assessed before the appropriate repair system is selected.

3. Column and Beam Jacketing

Column and beam jacketing is a specialised strengthening or rehabilitation technique that may be recommended in certain structural situations.

DPCON’s service categorisation includes column and beam jacketing within building repair and restoration activities.

Jacketing generally involves increasing or strengthening the section of an existing structural member using a specifically designed repair or strengthening system.

However, jacketing should not be treated as a standard solution for every damaged column or beam.

The requirement for jacketing, its design, material specifications and execution methodology should be determined through structural evaluation and engineering design.

4. Crack Repair

Cracks are among the most commonly noticed defects in buildings.

However, not every crack has the same cause or significance.

·         Cracks can occur in:

·         Internal walls

·         External walls

·         Plaster

·         RCC surfaces

·         Junctions

·         Ceilings

·         Building façades

·         Other construction elements

Before filling a crack, its location, pattern, width and possible cause should be evaluated.

A crack caused by surface plaster deterioration may require a different treatment from a crack associated with structural movement or another underlying issue.

For painting work, DPCON’s service process includes activities such as opening cracks, crack filling, primer coating and subsequent finishing.

Correct crack treatment helps prepare the surface for further restoration and painting.

5. Plaster Repair

Plaster protects masonry and concrete surfaces while also providing a smooth finished appearance.

External plaster is continuously exposed to weather, whereas internal plaster may be affected by moisture, leakage or ageing.

Typical plaster problems include:

·         Cracks

·         Loose plaster

·         Hollow areas

·         Damp patches

·         Flaking

·         Surface deterioration

·         Damaged external plaster

Where plaster has become loose or unsound, damaged portions may need to be removed before new plaster is applied.

Proper surface preparation is important for achieving adhesion between the existing substrate and new repair material.

DPCON’s building repair categorisation includes plaster-related activities such as breaking damaged plaster, surface preparation and plaster restoration.

6. Polymer-Based Repair

Polymer-modified repair materials and specialised construction chemicals are commonly used for specific concrete and masonry repair applications.

The appropriate product depends on the substrate, exposure conditions and repair requirements.

DPCON’s building repair service categorisation includes polymer chemical-related work as part of its repair activities.

Such materials should be selected according to technical specifications and the intended repair application rather than using a single chemical for every defect.

Surface preparation and correct application are equally important for the performance of a repair system.

7. Waterproofing Repair

Waterproofing is one of the most important aspects of building maintenance, particularly in a city that experiences substantial monsoon rainfall.

Water ingress can affect terraces, external walls, bathrooms, plumbing areas and other building components.

Common indications of waterproofing problems include:

·         Damp patches

·         Ceiling leakage

·         Wall seepage

·         Peeling paint

·         Damp plaster

·         Terrace leakage

·         Moisture marks

Repeated leakage during monsoon

DPCON lists Waterproofing Work among its main professional services.

Waterproofing work should begin by identifying the likely source and route of water penetration.

Simply painting over a damp surface does not constitute proper waterproofing.

8. Terrace Waterproofing

Terraces are continuously exposed to sunlight, rainfall and environmental conditions.

Water can enter through deteriorated waterproofing systems, cracks, joints or other vulnerable areas.

A terrace waterproofing project may involve:

·         Inspection of the existing terrace

·         Identification of leakage-prone areas

·         Removal of damaged or unsuitable existing layers where required

·         Cleaning and surface preparation

·         Crack or local repair treatment

·         Waterproofing application

·         Protective treatment or finishing according to the selected system

DPCON’s waterproofing work categorisation includes terrace cleaning, waterproofing chemical coating and traditional systems such as brick bat coba and IPS-related work.

9. Brick Bat Coba Waterproofing

Brick bat coba is a traditional waterproofing and terrace treatment method commonly encountered in buildings in India.

It uses brick pieces along with cementitious materials to form a protective layer and suitable slope.

Proper slope is particularly important because water should move toward drainage outlets rather than remaining stagnant on the terrace.

Where existing brick bat coba has deteriorated, inspection is necessary to determine whether local repairs or more extensive replacement is appropriate.

10. Chemical Waterproofing

Modern waterproofing systems can use specialised chemical products or membranes depending on the application.

Chemical waterproofing may be used on selected terraces, walls, wet areas and other surfaces based on technical requirements.

The correct product and method depend on:

·         Substrate condition

·         Location

·         Existing waterproofing system

·         Type of water exposure

·         Surface preparation

·         Intended finish

DPCON includes waterproofing chemical coating within its waterproofing service process.

11. External Wall Repair

External walls protect the internal building environment from weather exposure.

Because they face rain, heat, humidity and pollution, external surfaces can deteriorate over time.

Common external wall problems include:

·         Cracks

·         Damaged plaster

·         Paint peeling

·         Dampness

·         Surface deterioration

·         Water penetration

·         Loose finishes

External repair generally begins with inspection and surface preparation.

Damaged cracks and plaster are treated before primer and exterior coating are applied.

This sequence is important because painting over an unrepaired surface may hide the defect temporarily without correcting it.