3650 S. Broadmont DriveTucson, AZ 85713 (520) 624-6653 (800) 279-2278 (520) 624-3420 fax info@concrete-designs.com
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FIREPLACE MANTEL INSTALLTION INSTRUCTIONS
Intro
A precast fireplace mantel surround brings style to a room and often transforms the look of a room
Because the mantel is often the focal point, it is important that the installation is completed by a knowledgeable individual who is familiar with the product. The pieces can be heavy and special consideration for secure attachment is often required. CDI maintains a list of knowledgeable installers and can offer additional installation consultation services if assistance is required.
Tools & Supplies
For those familiar with masonry or tile installations or for those involved in the construction process, these guidelines are available for installing CDI's precast mantels.
Adhesive - Select an adhesive that is appropriate for the type of
construction and which works with a stone like product (marble,
granite, cast stone, etc.). For drywall, brick, or block construction,
a construction adhesive, an adhesive additive or thin set can be used.
For metal applications, it may be necessary to install a wire mesh on
the wall or use an approved construction adhesive. The working
time for construction adhesives is limited so they should be used by
more experienced installers.
Wood - 1 x 2 wood strips cut to various lengths to be used as temporary
Support while adhesives set up.
Mortar or Grout - The mortar is typically used for grouting and it can either be mixed or purchased as a pre-mixed mortar. White or gray grout colors are found at most home improvement stores to complement the fireplace color. Tile grout can also be used depending on the color of the fireplace and if an acceptable match is available.
Dry color can be purchased through a local concrete supply store when using the grout method. Contact CDI for information on color pigment.
A successful installation requires planning and a certain amount of technique. Time spent reviewing the instructions and understanding the products will help insure a smooth installation.
The installer should be familiar with the construction of the structure to which the fireplace mantel is being installed. The weight of the mantel is available on the CDI paper work.
When the precast concrete material arrives, lay-out the product to become familiar with it. Lay it out just as it will be installed on the wall. The product is designed to be installed with 3/8" grout joints between all pieces.
Review the layout of the hearth. Use the CAD drawing or literature drawing or sketch out the area. Review how the pilasters or fireplace face will sit on the hearth. Locate the hearth perimeter pieces. Measure the overall length and width of the hearth required. The best look will be achieved if pieces are cut equally. Begin with the hearth finished end piece(s) which are the pieces to make the front corner of the hearth. Depending on the molding, the hearth piece may have finished ends on both sides and may require a series of cuts to achieve the best look. The stretcher pieces should be cut to achieve an equal spacing. Be sure to allow for the 3/8" joint between each piece.
Mix the adhesive and prepare to adhere these pieces in place. Mix the adhesive so that it is moderately wet which will allow additional working time. Do not mix too much, but mix enough to plan on setting the entire hearth. If a construction adhesive is used, mixing will not be required. Start with each hearth end and adhere it in place, being sure the pieces are level and straight. It is best to level the first piece with the 2" level and then level the next piece to the one just installed using the 6' level. It may be required to place shims under the material to achieve a level hearth. After these two pieces are installed place the 6' level along the front of the pieces on the floor to be sure they are straight across. Continue with all the stretcher pieces along the front using the 6' foot level. Once these are completed install the pieces down the sides so they are level with the front material.
Next, the pavers inside the perimeter of the hearth will be installed. This requires building up the bas in order to bring the pavers flush with the perimeter molding. There are a variety of ways to raise the pavers. A common approach is to mix up mortar and fill the hearth interior so that the paver can set down into the area and be just slightly under the surface of the perimeter piece. Measure the overall distance to be covered with the pavers and cut the pavers equally so they will fill the area, allowing for the 3/8" mortar joints. After these are cut, apply the mastic to the back of the piece and on top of the mortar and set the paver into position and level it to the base trim.
The hearth may require some time to dry before continuing. Depending on the mastic used, it should have at least an hour to dry. Take this opportunity to study the surround pieces and determine where to make the cuts on the material.
Additional tools to complete most installations:
Suggested tools:
Suggested materials:
Installation Instructions:
Simple Paver Hearth
Paver & Molding Combination Hearth
Molding & Paver
Molding & Paver
Set the shims and continue up the wall. Across the top of the firebox, use wood to help hold the pieces in place. Cut the wood by measuring from the hearth up to the point where the casting will be positioned and add ½". For instance, if the space is 36 inches, cut the board at 36-1/2 inches to allow room to adjust the piece to insure it is level. If the corrugated fasteners can be used, it is a good idea to screw them into the wall. Do not nail as the vibration can move the pieces that have already been set. Level the material across the face so that both sides are straight and the middle will come together.
Photo of angle iron to support the shelf - yet to be installed. Also shows corrugated fasteners of the moldings below anchoring the products. These will be concealed when the shelf is installed. Sometimes special cut outs for gas valves, etc., may be required.
