How to Make Freestanding Rock Wall Mortar

Rock retaining walls less than 4 feet tall usually last for many years without the added benefit of mortar. However, walls taller than 4 feet need the extra holding power that mortar offers. The mortar mixing process only takes a few minutes. Mix the mortar in a wheelbarrow so you can easily transport it from one location to another. Since your retaining wall needs to move slightly to accommodate the ground's freezing and thawing process, do not make your mortar too thick and strong.

Things You'll Need

• Type S mortar mix
• Wheelbarrow
• Sand
• Water
• Shovel

Show More

Instructions

1. • 1

     Pour a bag of Type S mortar mix into a wheelbarrow. Add mixing sand according to the manufacturer's directions. Some manufacturers recommend adding less than 3 cubic feet of sand for every 75 lbs. of mortar mix.

   • 2

     Add water slowly. Stir the water, sand and mortar mix with a shovel.

   • 3

     Stop adding water when the mortar achieves a thick yet workable consistency. Continue to stir the mixture with a shovel for three to five minutes, and then begin using it immediately.