Structural joints in building construction

Types of joints

1. Expansion Joint
2. Contraction/Control Joint
3. Construction Joint

Material used to fill joints
    1.Joint fillers
    2.Sealants

 Properties of a good sealant

1. Protection
   
2. Durability
   
3. Less expansion
   
4. Good adhesion
   
5. Chemical inertness
   
6. Sound insulation - Air tight
   
7. Must be of softer grade and not stiff
   
8. Good wetting behaviour
   
9. Must be able to absorb thermal stresses