Granite countertops are one of the preferred material styles because of the durability of the natural stone. plywood decking). Consult with a design engineer or contractor for custom support applications. If you are asking, how much weight can you put on granite countertops? Concrete tops poured in our forms will usually weigh just over 15 lbs per sq. A typical counter might measure about 30 square feet. The answer lies in a combination of physics and liability. These features come together to create a natural raw material that is considered to be a prestige material. If the slab is long and supported only at the ends, it can break in the middle just from its own weight. My wife wants to put a fish tank or some type of decoration on it, and I was wondering up to how much weight we should be looking at placing on these counters without cracking, chipping, or completely breaking the granite countertops. If you enjoy cleaning the dishes or preparing your meals with the kids in the kitchen, bring them seats to sit on the kitchen island as you go about your duties. I'm not so concerned about the perimeter countertops - but want to be sure about the island! per square foot. News > Features Granite countertop span needs support. It is important to be aware of standard dimensions considering that they are a critical part of establishing an effective kitchen design. NOT well suited for laminate or tile counters, which have too many weak points along seams and grout lines to support the weight of the sink. First a couple… Countertop overhang will depend on various other measurements, such as the countertop itself and cabinetry. For all intents and purposes the answer is cabinets can hold almost unlimited weight. We can be a little more liberal and extend them 10” with strong granite verities like Tan Brown, Coffee Brown, Black Pearl, and other stronger stones. Thickness can vary across the expanse of the slab. Countertop sizes vary depending on the layout of the kitchen, bar or other room in which they are installed. Every homeowner wants a well-lit kitchen, and there is nothing wrong with this, but allowing a lot of direct sunlight in the kitchen can cause your countertops to fade. I have several undermount sinks in my own home, and they simply do not leak where the sink touches up against my granite countertops. It often costs much more than other naturally occurring rocks. It has a 15" overhang for seating and everything I read states anything over 10" needs support. While granite is tough and can handle a lot of weight, granite technicians highly discourage sitting or standing on them. Use granite countertop support brackets to support countertops with overhanging stone. If you have to stand or sit on the countertops, place sturdy plywood on the counters where you will now stand or sit on. I'm not so concerned about the perimeter countertops - but want to be sure about the island! Granite countertops are one of the preferred material styles because of the durability of the natural stone. A small granite countertop can weigh as little as 30 to 80 pounds (13.6 to 36.2 kg). These countertops are fabricated specifically for the kitchen that they’re going in. Jimmy Cabinet. 1 decade ago. on Facebook, Post status "How Much Weight Can You Put On Granite Countertops?" For example, if you decide to install a countertop that is ¾ inches thick, 2 feet wide and 5 feet long, it would weigh 120 pounds (12 pounds per square feet x 10 square feet = 120 pounds (54.43 kg)). Granite is strong and eye-catching because it has slowly cooled for a long period of time. How to Support a Granite Countertop Overhang. According to the Kitchen Cabinet Manufacturers Association, the weight limit of the average kitchen cabinet is 600 pounds. This makes for a strong and attractive situation. Doing this with another countertop can cause permanent discoloration and damage. For larger countertops, however, where weight can be a problem in terms of both handling and installation, contractors can use glass-fiber-reinforced concrete, lightweight cores, or special reinforcement methods to keep the weight down. Not only do they look great, they are supremely functional because the stuff destined for the garbage disposal can be easily wiped into the bowl without the annoying flange that is common with a top mounted sink! Mohs scale is the measuring unit for mineral hardness. Different countertop materials have different requirements. I have granite guys coming to put countertops in a customers kitchen, I was just wondering if you guys think i need to sister up the 2x10 that are under these slabs to beef up the floor or do you think that the joists should hold the weight? Granite countertops are scratch-resistant. This makes for a strong and attractive situation. This prevents too much pressure and weight on the countertop without proper backing. Cabinets seldom need reinforcement to support granite counter tops. Pro: Scratch Resistant. When installing granite countertops, you will not need an underlayment of plywood if the granite has a thickness of 3 centimeters (about 1 1/4 inches). These countertops are extremely heavy, and some cabinets may not be able to support the weight. Before fitting a countertop, it’s possible to calculate how heavy it will be once you know its thickness (3/4 inch or 1 1/4 inch) and its width and length. Granite support brackets. Now and then, prepare your food in different areas of the counter. Silicone applied between the two slabs allows for expansion and contraction, and a special epoxy holds the granite in place. Keep in mind that a seated person requires about 24" of space, side-to-side. As you should avoid sitting, you should definitely avoid opening a beer bottle on the counters. Granite tabletops add elegance and luxury to the decor, however this sleek stone cannot be placed on just any table base. Our engineer Sam walks you through an installation of the Liberty Hidden Countertop Support Plate to create the ultimate floating counter appearance. How can I make my cabinets strong enough to hold the weight of the concrete? Granite tiles and slabs come in different thicknesses. The weight of the granite is spread over a large area and should pose no problem. An unsupported span of 24” and up to a maximum of 36” is acceptable as long as the stone is supported on both sides of the span.Longer spans must be supported across the span.Over hangs should be not exceed 6” for 2cm granite, 10" for 3cm granite and 15" for 3cm quartz beyond the supported area. Sinks are often the countertops’ weakest areas, and having your three or four-year-old there you will be damaging your precious countertops. Granite is fairly thick, often at the very least ¾ of an inch. How much weight can they hold? For example, quartz can only handle between 150 and 300°F of heat exposure. Granite materials are actually igneous rock, which forms from a process of extreme heat and then cooling to create the hard and dense granite. Sunlight can also fade some of the sealants you used on your countertops, giving your surfaces a cheap look. This granite top is doomed for failure the moment someone decides to … Granite weights about 165 pounds per cubic foot. There are many places where extra overhang can add to the form and function of your countertop. Thats way more of everything than my hagen stand has - and it's rated to hold up to 1000 pounds! The kitchen countertop is one of the most important components of the room. In some cases you will need support brackets. Slabs can be thicker, but slabs that are thicker than standard are very rare and are more expensive. Divide that by 12 and that is what your granite counter top weighs per square foot. Welcome to Flintstone Marble & Granite Countertops,  Maryland’s  authority for premier granite and marble countertops. A larger countertop in a big kitchen can weigh hundreds of pounds. Risk damaging your countertops by leaving overhangs greater than 4 inches unsupported. 3/4 inch (20mm) thick granite weighs about 12+- pounds (5.44 kg) per square ft. 1-1/4 inch (30mm) thick granite weighs about 18+- pounds (8.16 kg) per square ft. If the slab is long and supported only at the ends, it can break in the middle just from its own weight. plywood on the back, sides, and top. on LinkedIn, how to avoid damaging granite countertops, 5 Ways To Keep Granite Countertops Looking New, 6 Steps On How To Polish Granite Countertops, 6 Tips On How To Prepare Cabinets For Granite Countertops, Website Design & Marketing by: D Graphic Studio. In most cases your cabinets should be able to support this weight. However, for granite with a thickness of 2 centimeters (about 3/4 inches), you will definitely need to use plywood for support. We have all the resources needed to handle all your countertops needs. This means granite is more than twice as heavy as the same volume of water! 3CM weighs about 18 lbs. Sat., Dec. 31, 2016. Use granite countertop brackets when overhanging stone counters. Any liquids that penetrate the stone can leave stains, especially oils, fruit juice, and wine. Granite weights about 165 pounds per cubic foot. sq. Quartz countertops often do not need support brackets. Click to see full answer Also know, how far can granite span without support? The weight of a granite countertop depends on its size and the thickness of the granite used to create it. Granite is very resistant to stains, but even water can still cause temporary discoloration if it’s allowed to soak in. Beyond securing the granite to a base that will support its weight, its appearance must match the grandness of the granite … A general rule for granite is no more than 30 unsupported inches in length (span.) Use a countertop support that extends to within 4 inches of edge of your countertop. Most slabs used for counters are roughly 1.25 inches thick. Granite is heavy and will require proper equipment or labour to accept goods on delivery. Hidden countertop support brackets are the solution. For Do-It-Yourselfers, granite tile countertops cost $4-$19 per square foot, or $120-$570 for a typical kitchen with 30 square feet of counter space. However, the cantilevered portion cannot be more than 1/3 the total width of the countertop. In some cases, you destroy the granite slab to the extent you have to replace it. per square foot. Solid Surface countertops can overhang 6 inches without additional support (e.g. If the weight is evenly distributed over a large area, the countertops can hold up to 1000 pounds. Granite tiles and slabs come in different thicknesses. Subsequently, question is, how much weight can a kitchen counter support? 0 0. This prevents too much pressure and weight on the countertop without proper backing. To avoid this, pull down the shades during the peak daylight hours. At a rough average density for granite of 2.7 g/cm3 the weight of a 1" thick slab of granite countertop with a front to back depth of two feet would be 28 pounds per lineal foot. The weight of a granite countertop depends on its size and the thickness of the granite used to create it. The weight of a granite countertop depends on its size and the thickness of the granite used to create it. For all intents and purposes the answer is cabinets can hold almost unlimited weight. Granite support requirements: Fragile stones may require corbels and supports that are spaced closer together and that do not allow as much overhang than the specifications here. One of the many advantages of granite and quartz countertops in a kitchen is the unique option to “undermount” a stainless, composite, or cast-iron sink. on Pinterest, Share "How Much Weight Can You Put On Granite Countertops?" We don’t want the stone to crack or worse, fall off the cabinet because of an unbalanced loading condition. A larger countertop in a big kitchen can weigh hundreds of pounds. Who knows, you might even discover a new favorite area you never knew existed? Yes, ... A general rule for granite is no more than 30 unsupported inches in length (span.) Neglect planning your countertop layout and support. Also, the weight will be distributed over a fairly large area. How to Install a Granite Kitchen Countertop Granite, like most natural stones, can be expensive. Granite counters are typically made from 3/4″ (2CM) or 1 3/16″ (3CM) thick sheets or slabs of granite. The weight of a granite slab will depend on the thickness. If you have older kitchen cabinets, or poor quality cabinets, they likely can hold much less weight. Through reviewing this guide, you can be … Even if you have narrowed down your choices to, say, granite vs Corian, DuPont’s flagship solid surface countertop material, you still have to weigh a lot of factors before deciding which one to get. Typical countertops can easily support a 200-lb. A: Fu-Tung Cheng, co-author of Concrete Countertops: Design, Forms and Finishes for the New Kitchen and Bath, replies: We generally install our countertops on custom cabinets made of 3/4-in. Don'ts of Countertop Supports. A small granite countertop can weigh as little as 30 to 80 pounds (13.6 to 36.2 kg). If you are planning on standing on the countertops either to change the lights or reach to the top shelf, you most likely won’t have your weight evenly distributed, which increases the chances of damaging the countertops, especially if your countertops have a weak point or small fissures. It’s normal to have a favorite food preparation area, but don’t be too attached to it. The average size of natural slab granite used for countertops is 9 feet, 6 inches long by 5 feet, 6 inches wide, according to bulk granite wholesaler Slab Market. We are frequently asked how much overhang a particular material is able to sustain safely. A. If the IKEA rep cannot give you an answer on what they can hold, it can … This means granite is more than twice as heavy as the same volume of water! How to Install Granite Countertops. Thats way more of everything than my hagen stand has - and it's rated to hold up to 1000 pounds! Granite is available in different thicknesses, and its weight per square foot varies. Considering that granite, marble, and limestone can have overhangs weighing hundreds of pounds, and considering how brittle granite countertops can be, granite support brackets are imperative. How to Support a Granite Countertop Overhang. ft. Many different materials can be used for the countertop. With 1 1/4 in. I have a granite countertop in my kitchen (maybe 3 cm thick) and I was wondering approximately how much weight this structure would be able to support. Divide that by 12 and that is … Also, just placing a bowling ball or heavy tool on the slab will not cause it to break, but dropping the weight a few feet can cause it to crack or chip at the point of impact. It also contains a wide range of attractive materials like feldspar, quartz, mica, and other materials. Also, the weight will be distributed over a fairly large area. Quartz countertops often do … It needs to function as a cutting surface, storage area, and decorative element in the design of the room all at the same time. Resources:http://sdfgranite.com/Weight%20of%20granite.htmhttp://www.granitegurus.com/2010/04/faq-how-much-does-granite-weigh_07.html. The straight answer is up to 12 inches for granite, providing 2/3 or more is cantilevered to offset the unsupported weight. This is because its density is approximately 162 pounds (73.4 kg) per square foot. on Google Plus, Pin "How Much Weight Can You Put On Granite Countertops?" Because there can be a slight difference in the thickness of two granite pieces, shims might be needed to ensure the tops are flush [source: Walton]. 3 cm Quartz (engineered stone) can handle a 14 inch overhangs and 3 cm Granite overhangs should not exceed a 10 inch overhang without additional support. Most kitchen cabinet manufacturers dictate their own weight limits, and 500 pounds is more common (albeit likely a conservative estimate). The plywood will help distribute the weight over a large area reducing the chances of caving in the countertops with your weight. This is because its density is approximately 162 pounds (73.4 kg) per square foot. This rank indicates the strength and density of granite materials. How Much Does A Granite Countertop Weigh? Can I use your corbels if my countertop is already installed? Most granite slabs are either ¾ of an inch thick or 1 ¼ inches thick. Unsupported span in the bedroom below the kitchen is … Granite is fairly thick, often at the very least ¾ of an inch. Use adhesive and/or fasteners that securely hold your corbels or braces to the support structure. We can extend the 3 cm granite countertops up to a maximum of 8” from the cabinets unsupported. A pot holder, towel, or other cover should be used when placing any hot pans or pots on the wooden surface. Granite is much less porous than these other stones. How to prevent stains: Make s… man. The granite slab is about as big as you can do without a seam. We offer expert design services for kitchen and bathroom countertops, fireplaces and bars tops. This can make the surface crack or break with time. Granite is a cool stone that can actually cool the item placed on the surface. Installing your own countertops is an ambitious project, but you can achieve it by planning and measuring carefully. How much weight can they hold? Joists are 2x12, 16 on center. The stone is cut to fit the cabinets perfectly. Granite countertops are harder to install because of the material and its weight. Solid Surface countertops can overhang 6 inches without additional support (e.g. Use granite countertop brackets when overhanging stone counters. I brought support up to the granite contractor and he said no support needed as he proceeded to sit on the edge of the counter. Two of the more popular are laminate and granite. It depends on how the granite slab is supported and how and where the weight is applied. Most granite countertops … Also, just placing a bowling ball or heavy tool on the slab will not cause it to break, but dropping the weight a few feet can cause it to crack or chip at the point of impact. According to the Marble Institute of America, you can safely overhang granite that is 1- 1/4″ thick up to 10″ without supports. Best of all no knocking knees and use all the bar stools you want because wooden corbels will not get in the way. Thus, installers often have to shore up parts of the slab so that all areas are supported. That is not strong enough to hold up to 1000 pounds that sit on a 5 knee. Beer bottle on the back, sides, and are more expensive no knocking knees and use all bar. 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