How To Build A River Rock Wall Without Mortar. How to build a rock wall 1. Dry without mortar stone work in the hands of a skilled waller is an art form.
Dig our foundation twice as wide and 1 2 feet deep depending on how high you are planning on building your rock wall. Rounded rocks are almost impossible to build into a wall without using copious amounts of mortar. Make sure the trench is a couple of feet wider than the intended width of the wall to ensure you have plenty of room to work you ll fill it in later when the wall is complete.
The trench should be deeper than the frost line and at least 2 feet wider.
Dig our foundation twice as wide and 1 2 feet deep depending on how high you are planning on building your rock wall. The foundation of the wall starts with a trench that reaches below the frost line. Using but one tool. Regretfully there aren t many ideal rocks available so look for angular rocks with the most flat faces.