You're absolutely right ... my head math was off. IIRC, the rule-of-thumb
formula I picked up at some point along the way for the estimating the
weight of granite was .097 of the cubic inches. I don't know if that is
standard or not, but it seems to get you in the ball park.
That coincides nicely with the formula in my previous post for estimating
granite countertop weights: (cubic inches X .097) = 167.6 Lbs cf. Weight
does vary according to type. IIRC, the black granite, which is popular these
days, is denser and runs in excess of 180 lbs cf.
This is dependent on where you are and the prevailing prices
of materials and labor. Areas where labor is inexpensive
will use thinner material (2cm/3/4") and pay to have someone
laminate a drop edge on. Where labor is higher it pays to
buy thicker material (3cm/1 1/4") and not have to hassle
with the laminated edge.
Once upon a time laminated edges were done all the time.
Now the tendency is to see 3cm/1 1/4" a lot. Personally I
like the look of the 3cm but it makes for a different
cabinet detail, i.e., you have to jump through some hoops a
little, to hide/bury the plywood sub-top.
I'm glad you axed that question. The last bits 'n pieces I
got were directed through Carrera, Italy (1). In fact I
"had" to go there for final selections of the material
before it was fabricated. The things I have to do for my
(1) The stone comes from all around the globe and shipped
to Carrera in blocks where it is sawed into slabs, cut to
size and fabricated. Carrera is also where Michelangelo
apprenticed in the quarries (cavas) and eventually where he
(Michelangelo) took the marble to carve the statue of David.
Just say (tmPL), being/standing in/on/around the same spot
as Michelangelo once/mighta stood can/will/should give you
the goosie bumps. Then again, maybe it was just me.
UA100, who will say, if you get a chance to visit Italy,
jump on it...
This is very coincidental since we just had granite
installed over our 16 year old oak cabinets. Before
they came to template, I reinforced & leveled evrything
in our kitchen (about 70 sq ft of granite). I screwed
2x4 to the back walls & put 3/4 sheets of plywood
next to every cabinet I could access.
More to the point of your question, the joint around
the dishwaher probably "failed" because of vibration.
Typically, they tap in some brass sinkers after hammer-
drilling a hole into the granite, then screw in the diswasher
flange. I can see that if this were anchored in both sides
of a joint, that the vibration would cause the epoxy to fail
Our joint did not occur in this location, but when I questioned
our installer about it, he suggested that if we did opt to put
the joint in that location, it would be a good idea to span the
distance (cabinet to cabinet) with wood & then anchor the dishwasher
to the wood and not the granite.
Just a few thoughts for you.
Thanks, and very coincidental.
The joint in question is actually just to the right (facing the wall) of the
right-side of where the dishwasher was. It's kind of strange, because there
is absolutely now support for the granite over the dishwasher... it's just
The arrangement is (again, facing the wall, and not to-scale):
================= ============= <-- Granite
|-----| | ---------|
sink --- dishwasher - corner - etc.
Looking at he above, the countertop on the left is slightly higher than the
part on the right.
I actually thought that the left part had "risen", but the granite guy was
100% sure that wasn't the case, and that instead, it was the part on the
right that had lowered (he checked with a bubble-type level).
Like I said, it was kind of funny (in the sense of strange) because he was
really curious about this, being a geological engineer. He was kind of
guessing that it might've been caused by some undetected earthquake. I was
kind of joking with him that he was probably sensitized to this because he
was from Turkey :). We're in Virginia, so I don't know if this is even
remotely possible, though I recall there was a small one either here or in
Maryland a few years back.
Anyway, we'll talk to the carpenter about the screws. I guess I'd feel
better myself if they put new ones in new locations.
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