Installation Instructions

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Installation Guide | Panels
Preparation of Surface
1. Clean.
Always make sure that the surface that MSTONE will be applied to is clean.
2. Weather resistant Barrier: (where required)
All exterior surfaces require a water/weather resistant barrier before installing MSTONE panels. This barrier
must
meet local building codes, UBC standard Code 141 regarding waterproof building paper or asphalt saturated
building felt. Rigid noncorrosive flashing is required for exterior wall use.
3. Lath or Wire Mesh: (Where required)
Install a 2.5 lbs. diamond mesh expanded metal lath or an 18 gauge woven wire mesh: Exterior applications
will require a galvanized metal lath, however a non-galvanized black metal lath may be used for interior
applications. Overlap lath sides by not less than 3/8 in. and lath ends by not less than 1 in. Attach the lath
using galvanized nails or staples 6 in. on center and 16 in. horizontally, penetrating studs to a minimum of
1 in. Continuously wrap metal lath a minimum of 16 in. around all outside and inside corners.
4. Scratch coat:
Apply a ½ in. thick scratch coat of type n or s mortar with a bonding agent over the metal lath. Use a
toothed scraper, notched trowel or small piece of lath to lightly rake horizontal grooves in the scratch coat.
Allow scratch coat dry for at least 24 hours.
5. MSTONE Panel:
Always make sure that the back of each MSTONE panel is clean and free from stone dust. This can easily be
done by wiping the back of the panel with a damp rag. Cutting MSTONE panels will create dust and should be
worked on outside. Clean the back of all panels after cutting them. Only cut MSTONE Panels with a wet saw.
Note: Mortar should be mixed to a firm but workable consistency. MStone systems recommends type n
or s mortar combined with a bonding agent*** (see architecture specification document for additional information). It is recommended that the
scratch coat dry for at least 24 hours. Certain weather conditions may require that the scratch coat is moistened prior to the installation of the MSTONE
panels.
** Integral bonding agent meeting ASTM C 9322 or ASTM C 1059 type ii. Refer to manufacturers’ instructions for mix ratio.
For a warrantied installation we recommend laticrete products and installation. Visit our www.MStonesystems.com for more information or call
1-866-698-5066
Installation of MSTONE Panels:
1. Always follow and check your local Building code requirements.
MStone should only be applied to structurally sound surfaces incorporating good building practices.
Please note that the assistance of a professional contractor or engineer may be needed to evaluate your
installation or the soundness of your installation back up wall. A contractor or engineer can also provide
important information regarding local building codes, seismic building codes, institutional building codes,
and installations