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How Boston's Longfellow Bridge Was Reborn

The historic restoration of Boston's Longfellow Bridge is now complete! The large-scale granite restoration project included onsite blasting by United Stone, as well as dismantling the bridge’s iconic Rockport granite “salt and pepper” towers piece-by-piece, and then transporting them to nearby workyards in Charlestown via barge for offsite restoration. The now pristine towers were reassembled using a mix of modern and historic construction technology. Skilled masons at United Stone were able to clean ornate granite carvings as well as the large granite blocks using the same equipment and media.

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Ellis Island Gets Facelift with Help from Sponge-Jet

The main entrance, an extended portico, leading into the great hall of Ellis Island National Museum of Immigration (NY, USA) required a face lift. Suffering from exposure to the brackish Hudson River salt-spray, the ±625 micron (±25-mil) old coating system was failing and previewing spot corrosion over much of its steel structure.

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Bronze Restoration on the USMC Memorial

In the late 1940s private funds helped launch the development and construction of the United States Marine Corps War Memorial near Arlington National Cemetery in Washington DC. The iconic flag raising over Iwo Jima was sculpted by Felix de Weldon then cast from plaster into bronze. The giant bronze pieces were assembled on site. In the nearly 70 years since the memorial was constructed, it’s never had a major restoration — until now.

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Concrete Restoration at the Guggenheim Museum

After 50 years of exposure to the elements, the Frank Lloyd Wright-designed Guggenheim Museum on New York City’s 5th Avenue needed help.

The art museum’s exterior concrete rotunda wall, which corkscrews outward as the building gets taller, was beset by hundreds of cracks ranging from hairlines to those that exposed steel reinforcement bars buried in 5-inch-thick (12.7 cm) concrete. And that’s just what Guggenheim’s team of architects, engineers, and restoration experts could see! Who knew what else lie beneath 12 layers of coatings applied over the decades?

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Marble Restoration with Sponge-Jet

Marble Restoration is a task frequently faced by masonry and historic restoration contractors. Marble has been used in buildings and structures for millennia dating as far back as the ancient Greeks in the 7th century BCE. Marble mining remains a global industry with quarries spanning across six continents. As marble has been used for centuries as a building material, many buildings and structures around the world contain marble that is showing its age with discoloration and staining.

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Fire Damage Restoration of Wood Beams

According to the National Fire Protection Association, fire fighters responded to 1.35 Million fires in the United States last year. The cause of these fires vary from grease fires while cooking to electrical overload on dated wiring. Industrial and Commercial property owners lose billions of dollars every year due to fire damage, but the majority of properties that get damaged are not a total loss. Most surfaces that suffer fire and smoke damage including brick, stone, and wood can be cleaned using Sponge Media™.

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How to Remove Paint from Brick

Brick has been used for the construction of homes and buildings since ancient times. The first known brick was discovered on an archeology site in the Middle East, dating its use back to 7500BC. This discovery means humans started using brick 3,000 years before the invention of the wheel! Similar to the wheel, the materials used to make brick has evolved.

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Historic Restoration at the Breakers Mansion

Conservators frequently turn to Sponge-Jet for help on historic restoration projects when there is a need to control dust, clean masonry substrates, or remove hazardous lead paint from steel and masonry. Some restoration projects include all of these challenges. Contractor R.J. Forbes faced this kind of multifaceted restoration project at the Breakers Mansion basement, tunnel, and boiler room in Newport, Rhode Island (USA). The project had several phases, including cleaning whitewashed brick and removing lead paint from steel beams all while visitors toured the property above the restoration site.

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Architect of the Capitol Celebrates the Completion of the U.S. Capitol Dome Restoration with Sponge-Jet

The work contractors and facility owners do using Sponge-Jet is often rewarding. Being a part of so many different applications and industries, from the building of battleships to returning fine art back into it’s gilded glory, our work is often hard to top. Perhaps this has been achieved on a project as important as the restoration of the U.S. Capitol.

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Historic Restoration of Government Buildings

From Duluth, Minnesota to Washington DC through Europe and South-East Asia, Sponge-Jet has seen a large number of cities and states use micro-abrasion technology to preserve and restore historic buildings and structures.

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