Q1: Consider the following factors :
1. Provision of a suitable slope to the top of the sill.
2. Proper throating of the sill to throw off the water outside.
3. Giving a projection of not less than 50 mm to the sill.
4. Providing damp-proof course below the sill to check the entry of moisture inside the main wall.
Those considered while constructing a brick sill would include