Tips on Installing Mortared Stone

  • Read the instructions and become familiar with the stone.
  • Adhere to your local building codes.
  • Ensure that you have all the tools and supplies you will need.
  • We are here to help, just call customer service 866-896-7625.

Prepping the Surface

Most M-Rock Stone products are typically installed by a qualified mason, however, even someone with basic masonry skillls can install manufactured rock.The following is a sampling of procedures for the installation of M-ROCK’s Traditional stone products.  It is recommended to check building codes for requirements and/or restrictions. Verify structural and surface integrity of existing wall prior to installation. 

Rigid Backwall

Figure1
Including wallboard, plywood, paneling, wall sheathing, concrete board, polystyrene insulation board. Cover sheathing with 2 layers of 30# felt or weather-resistant barrier, lapping joints 4” shingle fashion. In accordance with local building codes, lap and install lath or galvanized mesh using galvanized nails or staples vertically 6” on center, penetrating studs a minimum of 1”. Continue to wrap weather resistant barrier and lath a minimum of 16” around all outside and inside corners.

Existing Masonry

Figure3
Surface must be evaluated for mortar and face integrity and must be free of dirt, waterproofing, paint, or any other substance that could inhibit the mortar bond. Most masonry and stucco wall surfaces do not require preparation. Surfaces may be cleaned by pressure washing, acid washing, sand/bead blasting, or a combination of these methods to achieve a bondable surface. If the surface cannot be cleaned, attach lath before applying the mortar scratch coat.

Open Stud

Figure2
Open studs, on-rigid sheathing and metal siding must be prepared with 30# paper backed lath with a minimum ½ inch thick scratch coat and allowed to cure for a minimum of 48 hours prior to installation

Five Common Mistakes To Avoid:

  • Not wrapping your corners with lath
  • Mud and dirt stains from splashing
  • Hazing of the stone
  • Leaving voids behind the stones
  • Extreme conditions (too hot or cold)