Waterproofing contractor vs Painting contractor
A painting contractor makes a facade look finished. A waterproofing contractor establishes why it is wet first. On a building with hollow plaster the two produce identical results on handover day and completely different results two monsoons later.
The differences that actually decide it
| Criterion | Waterproofing contractor | Painting contractor |
|---|---|---|
| Diagnoses the water path | Yes | Rarely |
| Tap survey before quoting | Standard | Uncommon |
| Treats structural repair | Yes | No |
| Specifies coating by movement | Yes | Sometimes |
| Warrants against leakage | Where scope allows | No |
| Suitable for a sound facade | Yes | Yes |
| Suitable for a leaking facade | Yes | No |
Which one, and when
Choose Waterproofing contractor
- The building is leaking or the plaster is hollow
- Structural repair is likely
- A society repair contract
Choose Painting contractor
- The facade is genuinely sound and this is a recoat cycle
What goes wrong most often
Commissioning a paint job on a leaking building because the quotation is a third of the price. It is a third of the price because it is a third of the work, and none of the third that stops water.
Other decisions worth getting right
- APP membrane vs SBS membrane
Both are modified bitumen sheets applied by torch.
- Brick bat coba vs Torch-on membrane
Coba is a thick cementitious build-up that creates the fall, insulates the slab and forms the barrier all at once.
- Polyurea vs Polyurethane coating
Polyurea is spray-applied with heated plural-component equipment and gels in seconds, giving a seamless high-build film that can be walked on within the hour.
- PU injection vs Epoxy injection
The deciding question is whether the crack is moving and whether it is wet.
- HDPE membrane vs Bentonite
Both are pre-applied below-grade systems.
- Cementitious coating vs Liquid membrane
Cementitious coatings are rigid, breathable and bond well to damp concrete — which is why they suit tanks and internal tanking.
- China mosaic vs Shahabad ladi
Both are protective finishes laid over a completed terrace waterproofing layer — neither is a barrier in itself.
- Positive side (external) vs Negative side (internal)
Positive-side waterproofing sits on the face the water arrives from, so water pressure pushes it against the structure.
- Crystalline vs Surface coating
Crystalline systems penetrate concrete and grow crystals inside its capillaries, becoming part of the concrete.
Waterproofing contractor vs Painting contractor — questions we get asked
Waterproofing contractor or Painting contractor — which is better?
Neither, in the abstract. A painting contractor makes a facade look finished. A waterproofing contractor establishes why it is wet first. On a building with hollow plaster the two produce identical results on handover day and completely different results two monsoons later. The decision is made by the duty the system has to perform, not by which product has the better datasheet.
When should I choose Waterproofing contractor?
The building is leaking or the plaster is hollow. Structural repair is likely. A society repair contract.
When should I choose Painting contractor?
The facade is genuinely sound and this is a recoat cycle.
What is the most common mistake people make here?
Commissioning a paint job on a leaking building because the quotation is a third of the price. It is a third of the price because it is a third of the work, and none of the third that stops water.
Not sure which your building needs?
That is what the inspection is for. An engineer looks at the actual substrate, exposure and movement, then tells you which system fits and why the other one does not.
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