Merits :
- The mirrors used in elevating building are tough, reinforced and laminated glasses so they provide safety to the building.
- They make the building attractive.
- They used to cool inside the building.
- Absorb heat energy.
Demerits : - If any accident takes place we unable to see the persons inside due to reflection.
- Some mirrors used in buildings are easily breakable. So when they breaks the building loses its attraction.