Many Hyderabad houses now combine both: cement plaster outside and in wet areas, gypsum inside. Here is why.
Comparison
| Gypsum plaster | Cement plaster | |
|---|---|---|
| Where | Internal dry walls, ceilings | External walls, wet areas, everywhere |
| Finish | Very smooth; paint-ready | Needs putty for smoothness |
| Setting | Fast | Slower |
| Curing | No water curing | At least 7 days |
| Shrinkage cracks | Low | Higher |
| Moisture | Softens if wet for long | Durable |
| Thickness | Thin | 12 mm inside, 15–20 mm outside |
Where Each Belongs
| Area | Plaster |
|---|---|
| Bedrooms, living, ceilings | Gypsum or cement |
| External walls | Cement |
| Bathrooms, toilets | Cement (with waterproofing) |
| Kitchen wet zone | Cement |
| Behind wall tiles | Cement or as the tile system specifies |
The Short Version
Gypsum inside where it stays dry, cement outside and wherever water reaches. Using both gives a smooth interior and a durable shell.
