Resources > Purchasing a Copper Sink

Frequently Asked Questions (FAQs)

Copper Maintenance Instructions

Copper Facts

Purchasing a Copper Sink

Purchasing Your Copper Sink - Helpful Tips & Information
By Jack Healy

Shopping for a copper sink can be confusing. In this article, plumbing industry veteran Jack Healy will guide you through the maze of information and help you select the right sink for your project. You will learn some new terms like "living finish" and "metal gauge". Arm yourself with information before you buy!

Selecting a kitchen or bathroom sink use to be easy. There were just a few large companies selling ceramic, enameled steel, cast iron and stainless steel sinks. In the past decade, there has been an explosion of new products in the sink category and a growing demand for hand crafted and custom work. There have been several “new” sink mediums gaining recent acceptance – glass, various stones, brass, copper, and even wood. This article will focus on copper sinks and what to look for before making your purchase.

Copper is man’s oldest metal, dating back more than 10,000 years. Its use in the home in modern times ranges from copper tubing in your plumbing system to some of the finest cookware available. Restaurateurs, hoteliers and interior decorators look to copper and brass as naturally inviting metals that make a statement of quality, comfort and beauty. It is no wonder that copper has also become a popular material for sinks in the kitchen, bath and bar.

Copper artisans abound throughout the world, however the artisans that have gained a reputation for making sinks has been primarily centered in India, Mexico and the US. Most of the shops making “hand crafted” copper sinks are small and the methods used to construct sinks goes back centuries. The term “hand hammered” has recently become synonymous with Mexican sinks. This term refers to the original ancient techniques that artisans have been using for centuries in this area. Copper sheets are literally hammered into shape and hand finished. The results are somewhat rustic, but truly unique and one of a kind. Copper sinks in the US are made with similar techniques but are more often “smooth” rather than “hammered”. US copper craftsmen are dominated by shops doing custom work primarily for commercial projects such as restaurants.

When considering a smooth surface copper sink, be careful if it is for the kitchen or prep area. Smooth surfaces will show scratches and dents much more than a hammered surface which is a consideration if you are using the sinks to wash dishes, pots & pans, etc. In addition, the hammered surfaces are stronger than smooth surfaces and hold up better in the demanding kitchen environment.

There are three primary differentiators determining quality of copper sinks – construction technique & quality, copper thickness and the company you are buying from.

Construction technique is made up of several factors - how corners are constructed, welding technique and proper dimensions for ease of installation. When considering sinks with welded seams (generally larger kitchen sinks require some seams), make sure they are TIG welded using copper rod (“copper welded”). If not, the seams will eventually turn “grey” and possibly leak. We have seen copper sinks that have improper drain holes resulting in a gap between the drain escution and the sink bevel. Another potential problem is if the sink is “out of square”. This can result in big problems at the time of installation. Some bending of flat rims is OK and quite common (and easy to rectify at the time of installation) but square or rectangular sinks that are uneven will generally require a replacement. The company you are buying from should offer a warranty against such defects and stand behind their product.

The quality of the copper sink is made up of several factors – some aesthetic and some potentially harmful. Quality can vary even when considering sinks made in the same town such as many of the sinks from Mexico. Insiders refer to different quality levels as “firsts”, “seconds” and “defective”. Remember, these sinks are handmade one at a time by artisans with varying levels of skills and experience. Like any artisan crafted product, there can be varying levels of quality. At Copper Sinks Online, we only sell first quality products and leave the seconds to other companies selling on auction sites such as eBay or direct from Mexico. We recognize that this might mean a potential price difference, but we prefer to protect our reputation and ship only product we would be proud to install in our own homes.

Copper sinks should be made out of pure copper. Pure copper naturally posses Antimicrobial properties to prevent germs and bacteria from surviving on the surface of raw, unsealed copper. At Copper Sinks Online, are sinks are made of pure reclaimed or ASTM 187 B copper laminate. A growing concern of ours is the use of copper alloy containing lead – specifically in sinks from the Middle East and China – to reduce the costs of manufacture. Lead has similar workability properties as copper and is quite inexpensive, but it is not meant for human consumption! We can assure our customers that our genuine hand hammered copper sinks from Mexico are not made of these lead containing alloys.

Another quality factor to consider is the patina process used to artificially age the copper from a bright copper to a darker, warmer look. The widely accepted method for sinks from Mexico (including those made in our factory) utilize heat to patina the surface of the copper. Sinks from other countries are oftentimes using chemicals to “coat” the surface using harmful chemicals. These sinks are often lacquered or sealed to maintain the patina. Why is this not good? The lacquer used will wear away unevenly and in a short time the copper below will be exposed. This results in a very uneven surface. Be very cautious when buying a copper sink that any type of lacquer sealer is not used.

The thickness of the copper used in the construction of hand hammered copper sinks varies greatly between factories – even those in Mexico. Copper is a soft material and the thickness – even just a few points – can have a dramatic effect on how well the sink wears over time. Gauge is a physical measurement of the thickness of the copper and is sometimes referred to by the weight per square foot. The thicker the gauge copper, the lower the number. Most bath sinks are made from 20 gauge (the thinnest) to 16 gauge (the thickest) and most kitchen sinks range from 18 gauge to 14 gauge. When shopping for copper sinks, always ask about the gauge and be aware that a thicker gauge sink will cost more – and in most cases is worth it! A lightweight gauge metal can result in a “tinny” sound when running the faucet. It will dent easier (a big consideration for a kitchen sink). Although it costs much more, our sinks are only made with the thickest gauge copper available. Our kitchen sinks do not need sound insulation because they are not made from the thinner gauge copper we see being sold by most of our competitors.

Finally consider the store you are buying from. If a copper sink seems “cheap” in price, there is usually a reason. I have seen many of the copper sinks sold on the most famous “auction site” . All I can say is “buyer beware”, or more to the point “you get what you pay for”…. If something goes wrong with your sink or there is a problem when it arrives, you want to make sure the company you purchased from will stand behind their product. Think carefully about buying internationally. Too often, a sink that is received isn’t as represented. A reputable dealer should identify their shipping location, clearly state their warranty and return policy and be available for consultation.

I am a fan of copper sinks. I think they are rugged yet elegant – especially as they age. The rich highlights and undertones of the patina process are constantly evolving. A copper finish is a “living finish” and never really stops changing in color. That being said, the evolution of a copper finish is gradual, and as it ages it becomes even more handsome. You can greatly reduce this change with the use of wax , but personally I like to let the copper evolve. Most often this process results in a mellow brownish weathered copper patina. I like to refer to it as the basins soul.

Copper sinks often come in various finishes from a bright copper finish (like a new shiny penny) to a dark patina (we call ours “Dark Smoke”) and everything in between. The copper finish you choose is a matter of personal taste, but oftentimes our clients prefer the more “weathered” patinas to avoid the upkeep or uncertainty associated with shiny copper. If you want to slow down the patina process, try applying a wax like “Renaissance Wax”. Applied every few months, the wax will provide a barrier between the copper and the environment. You can read more about the care & maintenance of copper sinks at Copper Sinks Online .

Copper sinks for the kitchen come in two basic forms: Under Counter Mount or Farmhouse style. The rustic nature of copper sinks lends itself well to the farm sink style. Sometimes referred to as “apron front” sinks, these sinks come in a variety of sizes, shapes and with different configurations – i.e. single bowl, double bowl and even triple bowl. Bath sinks are generally available in three styles: vessel (above counter mount), “drop-in” or under counter mount. Usually the lip style determines whether the bath sink is a drop in or undermount. Be sure to order the proper lip style to accommodate your project.

If you have any other questions before you purchase any sink, feel free to give us a call at Copper Sinks Online – 1-877-340-0800. We would be happy to answer any other questions you might have.

Jack Healy is part owner of Functional Art Gallery, LLC - Functional Art Gallery - a growing family of online resources for the designer, architect, builder and discerning homeowner. The company focuses on handcrafted functional & architectural works of art for both residential and commercial projects. The Functional Art Gallery family includes Glass Artists Gallery, Sinks Gallery, Copper Sinks Online and Art Lighting Gallery. Together these resources provide the largest collection of artisan and designer products available in North America. As a 20 year veteran of the plumbing and lighting industries, Jack has written several articles aimed at helping the homeowner make more informed choices when purchasing sinks and lighting.