The Saint-Marc-des-Carrières facility supplies construction aggregates to the Portneuf area of Quebec, chemical-grade calcium carbonate to the agricultural, animal-feed and industrial markets in the Greater Québec City region, as well as stone blocks for dimension stone suppliers.

Other products available at this site include riprap for retaining walls and railway ballast.

The Joliette, Quebec plant produces hydrated lime and has bagging equipment to provide quicklime in 'Super Sack' on request. The facility is also used as a terminal and has storage capacity capable of handling fluctuating market demand. The quicklime operations are currently idled and the aggregates operations are closed.

Graymont's plant in the small community of Havelock, New Brunswick is the leading supplier of lime and limestone products throughout the Atlantic region market, which includes Canada's Maritime Provinces as well as the State of Maine. The Havelock plant utilizes a Beckenback annular shaft kiln to produce high-quality lime for a varied customer base.

Graymont is constantly seeking ways to add value by leveraging the Company's own resources in combination with other natural resources and economic sectors in a given area. At Havelock, extensive field research led to the successful introduction into the farming community of the first new agricultural liming material in more than 50 years. Hydra-Lime+ provides financial returns to the farmer two to three times greater than conventional liming practices by producing higher yields with superior quality tubers. It is this type of innovation that helps make Graymont the ag-lime leader in the Atlantic Region.

Graymont is one of the leading suppliers of lime in the northeastern United States.  The Pleasant Gap plant, situated in the State College area of Pennsylvania is the most modern lime plant in the region. The site encompasses a rotary preheater lime kiln (2005), a rotary lime kiln (2008), a vertical twin-shaft lime kiln (2016), two new lime-hydrating plants (2005 and 2018), a pulverized limestone plant (2006), and a robotic bagging and palletizing plant (2018).  

The newest rotary lime kiln incorporates a highly efficient emissions-scrubbing system, along with power generation from a waste heat recovery system - the only system of its kind on a lime kiln in North America.

Pleasant Gap also provides bulk product storage capacity and a multi-mode shipping capability, assuring that when Graymont customers place an order, it will be quickly shipped by rail or truck.

The Superior plant, located on the Lake Superior waterfront in Superior, Wisconsin, is ideally positioned to service the upper Midwestern states and central Canada.

Limestone is not quarried at this site; it comes from quarries in Michigan and is transported by self-unloading bulk freighters to the Superior dock. Finished product is shipped out by truck and rail, often providing return loads for overland carriers who have dropped off commodities for shipping out of the port.

Three types of limestone are calcined at the Superior facility to produce high calcium quicklime, high-calcium hydrated lime, dolomitic quicklime and PCC quicklime.The newest addition to the plant is kiln #5, a state of the art, high-efficiency preheater lime kiln.

In addition to calcined lime products, the plant is also a major supplier of finely ground limestone utilized by various mining and manufacturing customers throughout the Midwest.

Graymont's manufacturing facility in Gulliver, Michigan, produces high-calcium pebble lime in a rotary kiln, from limestone that is quarried on site. Lime from this plant is shipped by rail and truck throughout Canada and the U.S. under the brand name Western High Cal Pebble Lime.

Graymont's manufacturing facility in Green Bay, Wisconsin produces high-calcium pebble and hydrated lime from limestone sourced from quarries in Michigan. The limestone is delivered to the Company's dock by self-unloading lake vessels. Sufficient inventories of stone must be kept on hand in order to maintain full production through the winter months when the ships are laid up and  the quarries are closed.

The Green Bay site includes two rotary kilns and a lime hydrator as well as bulk storage capacity and warehousing space for bags. Calcium oxide is shipped in bulk and hydrate is shipped either in bulk, bulk bags (super sacks) or paper sacks by rail or truck throughout the United States, under the brand names Western High Cal Pebble Lime and Western Pure Cal Hydrated Lime.

Graymont Dolime (OH) Inc. is located in Genoa, Ohio, where a heavy strata of pure Niagara Dolomite lies close to the surface of the ground. The quality of the Genoa deposit makes it one of the select areas of the world for the production of lime for plastering applications due to its high chemical purity, excellent water retention and white color.

Graymont Dolime (OH) Inc. produces quicklime and hydrated lime for a wide variety of markets throughout the eastern United States and Canada. The company's product lines are characterized by strong brand names, including Ivory® Finishing Lime, Bondcrete® Mason's and Stucco Lime, Super® Limoid Mason's Lime, Kemidol® industrial products and Niagara® Lime Putty. Graymont Dolime's specialty product focus requires excellent customer support for both construction and industrial applications.

The Genoa facility is one of the largest dolomitic lime hydration facilities in the United States. The current plant consists of limestone rock processing, calcining, hydration, blending and packaging departments. Three rotary kilns burn sized limestone rock to produce dolomitic quicklime products with excellent reactivity. This quicklime is used either as an industrial product or as a raw material for the hydration processes. The hydration plant consists of two hydrators that operate under atmospheric pressure and three autoclave processes. Atmospheric hydration produces Type N hydrated lime products for use in industrial and agricultural applications. Hydration under high pressure in the autoclaves produces unique Type S hydrated lime for building and industrial applications. The blending department produces packaged blends of cement and lime for masonry and other applications. Two automatic packaging lines fill and palletize 10, 25 and 50 lb. bags for customer delivery. 

Graymont's manufacturing operations at Eden, Wisconsin produce dolomitic pebble lime and 'Type S' pressure hydrated lime from dolomitic limestone quarried on site. In addition to the rotary kilns and hydrator, the company operates a blending plant for lime-based mortars, which are available in more than 250 colors. The Eden plant ships products throughout Canada and the United States under the brand names Western Miracle Masons Lime, Western Type S, N and M gray and Colored Mortar Mixes and Limate, General Purpose Lime. Both the Eden and Green Bay, WI plants are served by the Canadian National Railroad.