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Careful installation is necessary to achieve a good-looking product.
Carelessness, insufficient help, or lack of experience can result in
broken pieces or a less than desirable installation job.
Basically, you have two choices:
1. Hire a professional
There are people who have experience installing granite counters. If
they don’t specialize specifically in granite, sometimes a tile
installer or kitchen installer can also do the counters. Charges should
range in the $8 per square foot.
2. Do it yourself
We will attempt to describe the process here, however, please read
everything carefully so you can make a good decision as to whether you
can tackle this job. We highly recommend installation by a
professional. This professional might be found in the yellow pages
or other business directory under granite counters, kitchen counters,
but even some individuals who do tile installation and carpentry may
have the tools and skills to install your counters.
MATERIALS
You will need sufficient labor to help lift and maneuver the pieces into
position. Some pieces can be quite heavy (multiply the area by 15
pounds per square foot to get the weight). Not only do you need to
carry these pieces, but you need many hands to maneuver them into
place. ALWAYS carry pieces vertically – never horizontal.
TOOLS & MATERIALS
You will need the following tools and materials:
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An ample quantity of good quality clear silicone sealant (This sealant
provides the necessary flexible and waterproof adhesion for the
granite)
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Epoxy Glue
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A razor blade scraper
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Paper Towels
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A level
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A 4’ metal straight edge.
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Some wooden wedges (to level granite until silicone cures)
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Alcohol and rags
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A belt sander (to sand and level cabinets if necessary)
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A jig saw (to cut cabinets if necessary)
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Some 2" x 4" pieces (to brace sink until silicone cures)
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Help, to carry and maneuver pieces from vertical to horizontal.
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A diamond saw may be necessary to adjust joints, fit pieces or cut
backsplashes into place.
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String (to check for level)
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Carpet scraps or pieces of cardboard
PREPARATION
All the cabinets need to be installed. You will need to have on hand at
the site any items that will be installed into the counter – sinks,
faucets, cooktops, etc.
Check for level – use your 4’ straight edge or string to make sure the
tops of the cabinets are level. Sand any edges that are too high. Add
small wood wedges with silicone in areas too low.
Make sure the granite is at room temperature. If it is cold, moisture
may condense and the silicone won’t stick properly.
CAREFULLY uncrate your granite. Granite will receive its most stress
during uncrating and installing, which means if it is going to break at
all, it will be during this time. Your crate will be constructed with
screws. Unscrew sequentially and remove pieces one at a time. Make sure
you have a place to put each piece. ALWAYS carry and store each piece
vertically. Have some cardboard or carpet straps available to set the
pieces down.
PROCEDURE
Install any "locked" pieces first – those with other pieces seamed to
them.
Installation can be simple. Make sure that the surfaces supporting the
granite are level. Place the piece to make sure it will fit. Remove the
piece and apply an ample bead of silicone sealant on all contact edges.
Place the piece.
Continue with the next adjoining piece. Be sure to put a bead of
silicone on the joint between pieces.
If you run into fit problems – perhaps your template was not quite
accurate, you may have to adjust your seam with a new cut with a diamond
saw. This is a rather major procedure and should be left to the experts.
Sometimes a fit problem can be remedied by cutting a small channel into
the drywall to fit the granite. Drywall will be thicker at seams and in
the corners and can result in an uneven fit unless the drywall has a
channel to fit the granite.
Make sure you have plenty of hands available to maneuver the granite
from a vertical carry into a horizontal position. Without sufficient
support, you could crack a piece.
A large kitchen may require some adjustments to all pieces after
installation. Make sure you are still able to move pieces before the
silicone sets.
Some seams without sufficient support or in a high stress area should be
joined with epoxy instead of silicone. You may have to temporarily
support or brace pieces until the epoxy or silicone is set.
Undermount Sinks are best installed to the granite counter before
the granite is installed. First, lay the granite piece in place and make
sure it fits correctly and that the sink has all necessary clearances to
fit. You may have to cut some wood of the cabinets away for sufficient
clearance. Check also at this time for clearances for faucets and other
plumbing. Again, you may have to trim some wood.
Make sure the granite has been at room temperature for at least 4 hours
and is dry. If not, the sealant may not adhere properly.
Lay the granite piece upside down on the floor. Clean the area of
contact thoroughly with alcohol and allow to dry thoroughly. (at least 2
hours).
Attach the sink with ample silicone. Heavier sinks (enameled cast iron)
should have small holes drilled (diamond drill in impact drill) on a
FULLY supported granite piece to a depth of about ½". Fill with a lead
shield and screw sink tabs into shields. Use the silicone sealant and
the tabs. Allow silicone to fully cure (usually about 24 hours)
Backsplashes are installed by placing a bead of silicone along
the top edge to adhere to the wall and a bead along the bottom for
sealing and adhering to the counter. You may discover that your drywall
is not a straight surface – this is common since drywall compound is
built up in joints and at corners. You may have to cut into the drywall
with your utility knife to situate the backsplash with a minimum of
gaps. You can test this ahead of hand with your 4’ straight edge or your
string. A small gap between the backsplash and the wall can be
filled using some filler (latex or silicon) that you will paint later.
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