Building a brick wall is not as difficult as its seems; you just need to get the basics right. Choosing good quality material and putting your efforts are the two factors which play a crucial role in this task.
More importantly, by building it on your own, you also save a decent sum of money. The investment involved will include the money spent in buying the necessary material and some of your valuable time―ideally a weekend.
The ratio of the wall and foundation should ideally be 3:1, which means for every three feet of the wall above the ground, you should have a foot deep foundation. If you want to construct a six feet wall, its foundation should be two feet.
Ideally, the foundation should be in an inverted T shape, with the extra footing on either side of the wall. If you intend to build a brick wall of the width of two bricks, your foundation should have the width of 4 bricks.
Make sure that there are no gaps in the foundation. Fill all the gaps using the trowel to feed the mortar in them. Once the foundation is laid, allow it to dry for sometime. After it dries, you can start the construction of the remaining wall.
Pour some water on the bricks to make them wet, so that they don't absorb water from the mortar and make it dry powdery and ineffective. Start the construction from one side of the foundation. Using the trowel prepare a layer of mortar on the foundation and keep a brick each on either ends. Take a cord and fasten it around the bricks.
This cord will ensure that the alignment of bricks is in a straight line. Once the cord is in place, put some mortar along the base and set the brick on it. After the first brick is set, put some mortar on the side and set the second brick. Continue in similar sequence until the entire layer is done.
You will have to be careful not to leave any space between these bricks. With the trowel you will have to fill all the visible gaps. Use the level indicator to ensure that all the bricks are properly aligned. Start with the second layer of bricks in similar fashion as you did the first one. Continue with subsequent layers until you get the desired height.
Allow it to dry for the next 24 hours and your brick wall is complete. In order to make the wall clean and presentable, you will have to brush off the excess mortar on it. If you intend to build a wall with stone, the basic process will remain the same. However, you might have to abide by some specific instructions required for that particular stone type.