Using an inappropriate type of mortar can lead to the veneer not adhering properly. Be sure to wrap all corners, overlapping the metal lath at least 4". It is very important to plan the layout of veneer pieces carefully. Typically, a good mortar mix consists of one part N or S cement and 2.25 parts sand, but premixed scratch-coat mortar is also available. Plywood or wall sheathing do need a lath, and plywood or drywall on interior walls need a lath and often require extra support as well. Prepare a scratch coat of type N or type S mortar. Veneers made from genuine stone are exceedingly heavy, even though they are only 3/4 to 1 1/2 inch thick. Many products can be applied directly to poured concrete or concrete block walls, but wood-framed walls will require vapor barriers and metal lathe. Before any work can begin, in most instances, you must place a waterproof material over the area that will be covered with stone veneer to protect the wall behind the veneer. © Copyright 2020 Hearst Communications, Inc. Here are the basic steps pros use to install manufacturered, concrete-based stone veneers. Call an RCP Block & Brick near you for available products and tips. Juan Rodriguez is a former writer with The Balance who covered large-scale construction. Before you can begin the installation project, you will need to calculate the proper amount of material for your thin stone veneer project. Surfaces that have been painted must be sand blasted or otherwise stripped of paint. Mortar creates the bond between the stone veneer and the wall. He is an engineer with experience managing and overseeing large civil works construction. It is also recommended to work your way from the bottom to top. Sealed stone may be easier to clean than unsealed stone, and certain sealers also repel stains. Below are the steps involved. The same mortar used for this scratch coat can also be used for the bond coat and also for grouting the seams. This will create suction when putting the stone in place, which will help to hold the stone until the mortar sets up. By using The Balance Small Business, you accept our. Or, you can use a sheathing paper, such as grade D asphalt builder's paper. Fill the bag with mortar and squeeze it while moving the nozzle along the joint. 254 Platinum, designed to just mix with water, has a long open time with unsurpassed adhesion and workability. Most stone is packaged assuming a 1/2" mortar joint. Also anchor the sheating to the sheathing between studs, spacing nails about 6 inches apart. A scratch coat will be needed when metal lath is used. If mixing from scratch, combine 2.25 parts water and 1 part type N or S cement. Cover the entire lath surface with the mixture in a layer 1/2 to 3/4 inch thick, using a trowel. Apply sheathing over the studs. In addition, you must use enough mortar on the backs of the veneer pieces to ensure the veneer adheres properly. If a scratch coat is necessary, use a masonry trowel to apply a 1/2" to 3/4" layer of the scratch coat mix over your metal lath. If the grout smears or falls away in large chunks, it is still too wet for brushing or striking. This can be the same basic house wrap used under lap siding, such as Tyvek. For wood-framed houses, most veneer products call of installing a vapor barrier against the sheathing as a first step. Stone veneer can transform an interior wall into a focal point. Remember that trimmed edges will be covered later by using grout, but it is a good idea to position cut edges where they won't be in direct sight lines. Plus, there are options for installing stone veneer over both metal and wood-framed walls, as well as over masonry substrates of CMU block or brick, and also over poured concrete. Water infiltration and damage can be caused from incorrect installation. 1 part Type S Masonry Cement to 2.5 parts sand. Stone has a classic look that suits a wide variety of architectural styles. Place a protective material on the ground where rain or water can cause mud to splash onto your stone. You will be affixing the stone veneer to the scratch coat using a stone veneer mortar. In most cases, it is a relatively thin veneer of a molded concrete product that has been colored with iron oxides to look like natural stone. Wet mortar on stone will leave a filmy residue that dulls the appearance of the stone and should be removed immediately before it dries/hardens. If cleaning of surface is too difficult, metal lath may be affixed to the surface with concrete nails. The manufacturer's instructions are the best source of precise directions on preparation, installation, and maintenance. It is important to clean stone veneer within 30 minutes, before mortar can fully dry on the face. A weak bond between the stone and area of application can lead to problems such as the stones coming off the wall. Lay the stone against the wall, pressing and rotating slightly, forcing some of the mortar to squeeze out freely. You should see some mortar bunch up around the edges of the stone. Start by washing all the stones, then lay out the pieces on a flat surface to test the layout. Fill all the joints between the stones with about a 1/2" layer of mortar (more or less depending on the desired effect and joint size.). Stone veneer comes in several different types, and the exact preparation and installation process will vary somewhat depending on the product. Stone should be installed at least 3" above grade level to prevent water from continually saturating behind the back of the stone and causing structural damage. Normally vertical and horizontal joints should be staggered to prevent long, unbroken lines that may draw the eye to a particular area. The Balance Small Business uses cookies to provide you with a great user experience. 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There are a limited number of patterns in manufacturered stone veneers, and carefully planning the arrangement of pieces helps ensure a natural-looking result. Make sure there is enough water in the mix to achieve a workable consistency, but not so much that the mortar falls off the trowel and drips off the lathe. A nipper can also be used to trim small amounts off the stone. Prepare the mortar mix for bonding the veneer. Grout is ready for finishing when it crumbles away like sand when brushed. Be sure to wrap all corners overlapping the metal lath at lease 4". It is important not to allow mortar to dry on the face of the stone. For instance, there should be a gap between the bottom of the veneer and the ground to let water seep out and to prevent wicking. It's a good idea to blend many boxes of veneer pieces together in order to ensure a random blend of colors and shapes. How Many Coats of Grout Sealer Should Be Used on Tile Walls? Exact preparation steps will depend on the surface to which you'll be attaching the veneer. Be certain that the surface of the stone is free of dust, dirt, or any loose particles. If the stone slides or slips when you release it, then it's likely the mortar layer is too thin or that the mortar has been mixed too wet. How to Install Stone Veneer on Interior Accent Walls. Finally, there is also true stone veneer that is made from thin slices of actual stone—usually limestone or sandstone, but occasionally granite. While installing a stone wall takes skill, installing stone veneer, which creates a similar look, is much simpler and can be done by an amateur. Including Plywood Paneling, Wall Sheathing, or Flush Metal Siding. The texture of the mortar should be paste-like—wet enough so that it will not dry out but stiff enough that the stone can be adjusted and leveled as you apply it. Using a trowel, "butter"  a 1/2-inch-inch thick layer of mortar onto the scratch coat and onto the back of the veneer piece. Be sure to wrap all corners overlapping the metal lath at lease 4". If mortar gets onto the face of the veneer pieces during installation, wait just long enough for it to harden slightly and get crumbly, then brush it away. This prevents the stone from pulling moisture away from the mortar allowing it to dry naturally and with a stronger bond. It takes a very skilled and intrepid DIYer to tackle such work on a full house project, though veneering a landscape wall or shed can be relatively easy. There are also some mortars designed specifically for stone veneer, which contain polymers and sometimes other chemicals that enhance the bond between the stone and wall. However, faux stone and brick veneer gives you that timeless elegance for a significantly lower price and you can install it yourself. Use Pre-blended Type S mortar. In accordance with local building codes, install metal lath on top of the weather resistant barrier using galvanized nails or screws 6" on center vertically and 16" on center horizontally, penetrating the studs a minimum of 1". Next, install sheets of expanded, galvanized metal lathe as foundation for the mortar under the veneer. Re-seal the veneer every other year or following the manufacturers recommendations. Keep your hands and your stone veneer clean during the installation process. Otherwise, lay out small sections and apply them in stages. Brush the joints with a whisk broom to smooth them out and clean away any loose mortar. Step 5: Installing the Stone Veneer You will be affixing the stone veneer to the scratch coat using a stone veneer mortar. Removal can be accompolished using a stiff brush and clean water. Mix thoroughly until it reaches the consistency of thick paste. Painted or sealed brick, concrete, or similar materials need their coatings cleaned or require a lath. Mixing the Mortar: Use a … Be sure to overlap joints 4" in shingle fashion. RCI Inc.: Synthetic Stone Veneer -- How to Avoid Problems, Star Tribune: Rampant Installation Problems With Stone Siding, RCP Block & Brick: Installation: How to Install Stone Veneer, Stone Business Online: Stone Veneers: Mind Your Mortar, Installing Ceramic Tiles on Bathroom Walls. When it's properly installed, these veneers are almost indistinguishable from solid stone. Untreated concrete, brick, stucco and similar materials don't need preparation or a lath. Begin by installing the veneer pieces that wrap around corners. Cover surface with a weather resistant barrier such as tar paper. If your project includes corner stones, deduct 1 square foot for each linear foot of corners that you will utilize. Mix according to manufacturer's directions. Before applying the stone, it is a good idea to lay the stone out flat to determine the sizing and colors of each individual piece, how they will be laid out for your project, and if any trimming is necessary. When the mortar mix starts to dry, use a pointing tool to pack the mortar into the joints, eliminating any voids.

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