About Us
JTI is a family-owned company that has been dedicated to restoring historic buildings for over 70 years, spanning three generations. Our primary focus is on flat and ornamental plaster restoration. We are continually seeking innovative methods to improve our restoration and conservation techniques. At the same time, we take pride in our technological advancements, including our proprietary telescopic lifts, which allow us to repair damaged plaster without the need for intrusive and costly scaffolding.
Now led by Ray Tiedemann, who has a deep-rooted background in the liturgical plastering and painting trade, working alongside his father and uncles, JTI has broadened its scope to include the preservation of national historic sites. Throughout this journey, we have assembled a talented team of designers, plasterers, painters, faux finishers, artisans, and fine artists. Each member brings a wealth of experience, skill, and passion to every project we undertake.
Our Story
John Tiedemann was born in New York City in 1906. His father passed away when he was three years old, prompting his family to move from New York City to Jersey City, NJ. John left school in the sixth grade to work at a foundry, helping to support his widowed mother. Despite starting work at such a young age, he had greater aspirations. By the age of 13, he had self-educated himself in electricity by reading extensively. At just 13 years old, he owned his own electrical contracting business, employing five people to convert gas-lit houses into electrically-lit homes.
John married Julia Melvin in 1921 when he was only 15 years old. The couple went on to have a large family, with 13 children—11 boys and 2 girls.
When John turned 20, he recognized a growing opportunity in the market and started educating himself again, this time in converting coal furnaces to oil-burning furnaces. He identified a demand for oil and wanted to launch an oil delivery service. However, his wife was opposed to the idea of incurring debt to buy trucks. Consequently, he sold his business to a company that is now known as Efficiency Oil in Jersey City, NJ.
During the Great Depression, when jobs were scarce, John found work on a merchant marine ship. This experience allowed him to travel the world and learn about different cultures and architectural styles. Upon returning home, he got a job at St. Michael's Church in Jersey City, where Monsignor McWilliams quickly recognized John's talents. He assigned John to build an addition to St. Michael's Parish School and a gymnasium.
In 1953, Monsignor McWilliams approached John with a problem he had encountered several times before. The church needed painting but could not afford the scaffolding necessary to reach the high ceiling. After several days of contemplation, John began to research equipment that could be built to access the ceiling.
He conceived of a boom lift similar to the equipment used by sign installers at the time, but he aimed to create a smaller, lightweight version without counterweights. John developed an outrigger system for this boom, despite everyone he consulted insisting it would never work. However, his determination prevailed. He found a company willing to construct the boom based on his specifications.
John purchased a 1947 Willys Jeep to mount the boom and install his outrigger system. The machine was completed in late 1954 and underwent testing for several months before being put into use. Despite skepticism from engineers and others, John's confidence was unshaken, and indeed, the boom exceeded his expectations.
In 1955, John painted his first church, St. Michael's in Jersey City. Over the years, his company underwent several name changes, eventually settling on John Tiedemann Inc. in 1964. Since its inception in 1955, the company has manufactured three more booms for its own use and has painted and decorated over 1,500 religious buildings.
Today, Raymond Tiedemann, one of John Tiedemann’s 54 grandchildren, serves as the president of John Tiedemann Inc. He manages all aspects of the company daily. The equipment developed by his grandfather is still in operation, making it convenient and cost-effective to paint and decorate churches. The staff at John Tiedemann Inc. includes a large team of designers, plasterers, painters, artisans, and fine artists. They offer comprehensive services for complete interior restorations, from design to finishing touches, with unmatched expertise in the field. Please explore this site to see the quality of work we provide.
John Tiedemann Incorporated (JTI)
JTI is a family-owned company that has been dedicated to restoring historic buildings for over 70 years, spanning three generations. The company specializes in flat and ornamental plaster restoration. While JTI continually seeks innovative ways to enhance restoration and conservation techniques, it also takes pride in its longstanding technological advancements, such as proprietary telescopic lifts. These lifts allow for the repair of damaged plaster without the need for intrusive and costly scaffolding.
Under the leadership of Ray Tiedemann, who was raised in the liturgical plastering and painting trade alongside his father and uncles, JTI has broadened its focus to include the preservation of national historic sites. Throughout this process, JTI has assembled a talented team of designers, plasterers, painters, faux finishers, artisans, and fine artists, each contributing experience, skill, and passion to every project undertaken.
Our Team.
Ray Tiedemann from JTI and Eric Stewart from HPCS have teamed up to combine their expertise, experience, and technology for the historic conservation community in the United States.
Historic Plaster Conservation Services (HPCS)
HPCS is an award-winning Canadian architectural conservation firm known for its exceptional work in large plaster conservation projects. The techniques employed by the firm are rooted in the methods and formulations developed by Morgan Phillips, a key figure in the advancement of architectural conservation in America.
Rod Stewart and his son Eric, who serves as the president of HPCS, have dedicated much of their professional careers to refining Phillips’ consolidation recipes and creating innovative application methods for preserving historic plaster. Their efforts have resulted in a highly effective system for consolidating (solidifying) and re-keying plaster ceilings. The HPCS system stands out as unparalleled within the conservation community.
Additionally, HPCS continually seeks opportunities to experiment with techniques and materials that will prolong the useful lifespan of historic plasters and stuccos.
For more information, visit the HPCS website at: www.historicplaster.com.