3cm quartz countertop overhang needs supported over 10"?
Just had the fabricator come by to measure our newly installed island for the countertop. We are going with LG Viatera Rococo in 3cm. According to the LG Viatera's website at 3 cm assuming at least 2/3rds of the countertop is supported the you can have up to a 14" overhang without support. The base depth is 35.5" There will be legs attached to all four corners that will come out an additional 1.5", though they are mostly decorative. I am going through Home Depot for this, and he is saying that the store requires it. In our area I had HD and one other option and unfortunately they were literally twice the price for the same product. I would have gone with them if it were just a few hundred more just for the service. I'm sure HD does fine for the most part, but I'm just not surprised to be running up against this. Just annoyed. I am going to try to talk to them about it tomorrow, but not expecting a lot of budge from a big box store and as much as I hate it, its still much cheaper than my only other option. However, I would like some opinions about the true necessity of the support. They want to charge $100 per support bracket (the flat steel kind) which just seems ridiculous to me. We could certainly install those ourselves for much, much less. This is what we will do unless there is some true cause for concern with a 12" overhang on this island? It seems like the 29"x 21" sink cutout will be taking out a large chunk of weight on the front side as well, unless perhaps that is less area that is adhered causing a problem?
Here is a picture of the island. Naked (no legs or panels/doors) is measures 74.5"x35.5", we were ordering a 78.5" x 49.5" slab to give .5" to 1.25" overhang off the sides, legs and doors, and a 12" overhang off the back. Given this configuration and 3cm quartz am I right to assume any additional support is somewhat redundant?
Comments (14)
Forever Now
4 years ago
PROJeffrey R. Grenz, General Contractor
4 years agoForever Now thanked Jeffrey R. Grenz, General ContractorRelated Discussions
Support for overhang on granite counter top.
Comments (38)Need advice please. have island 10ft long island x 4ft 2" (50inches)wide. overhang will be 12 inches down the entire 10ft length. have 24"d base cabinets plus another 12"d set of base cabinets back to back. (36 inches of base cabinets that granite will sit on). question is how many support posts will be needed down the 10ft length of overhang ?(14inch overhang) Will one support post on each end be sufficient or do I need 3? can't add metal supports into top of cabinets, not enough space between the cabinet doors and top of cabinets. no room for corbels. support posts are the only option. would like one on each end vs adding one in middle. help!...See MoreCounter top bar-do you need supports?
Comments (16)Our raised bar on the peninsula will be 18" wide. About 5" of it will rest on the supporting wall; about 1" will overhang on the counter side; and about 12" will overhang on the other side where bar stools will be placed. It will be granite and therefore pretty heavy - its 7' long. We didn't want corbels to interfere with seating, so our granite fabricator is routing the underside of the granite and installing 1/4" steel plates under the bar (every 18" or so) as supports. The routing allows the steel plates to be flush with the underside of the bar. They will be visible only if one bends over and looks up underneath the bar. They charged nothing extra for doing this....See MoreWill I need support for my granite counter where it overhangs seating?
Comments (3)Yes, you will still need support. Check the "Stone Information and Advice" thread for more information, but to summarize.... countertop support: Supporting the width of the countertop: You need a corbel or support every 30 linear inches of unsupported overhang Supporting the depth of the countertop: General: You need to support at least 2/3 the entire depth of the stone, so assuming you have 24" deep cabinets on one side of the island and your seating overhang is on the other side, you need the following: If your granite is 2 cm thick, then there can be no more then 6" of of unsupported span with a 5/8" subtop If your granite is 3 cm thick, then there can be no more then 10" of unsupported span - no subtop required If you need support, then to determine your corbel dimensions: . Thickness of Stone - Dimension of Unsupported Span = Corbel Dimension . i.e., an 18" total overhang in 2 cm would require a 12" corbel; the same overhang in 3 cm would require an 8" corbel If you are using a pony wall or cabinets with a depth of less than 2 times the depth of the overhang, then you need to provide support to equal at least 2/3 of the total depth of the countertop....See MoreOverhang support with quartz counters?
Comments (2)3cm stone needs supports after a 10" cantilever, 3cm engineered stone needs supports after 15". This according to the Natural Stone Institute and estone manufacturers....See More
mark_rachel
4 years ago
weedmeister
4 years agoUser
4 years agolast modified: 4 years agoForever Now
4 years agolast modified: 4 years agoForever Now
4 years agoHU-459777929
8 months agoForever Now
8 months agoSorry, HU-459777929, this was about 3 years ago and I no longer have the link. I checked out the LG Hausys (Viatera) website but couldn't find it. It's changed quite a bit. I did find a Viatera Fabrication Guide with those specs on SlideSide with a google search: https://www.slideshare.net/MarbleConcepts/viatera-fabrication-guide
Here's a screenshot of the overhang guidelines:
By the way, I got such heck for the frame of this island, but it turned out beautiful and so did the countertops! These were taken along the way. I've never done a finished shot of the kitchen. It took too long!
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