The Global Standard for Conserving Historic Plaster

Historic Plaster Conservation Services (HPCS) was founded in 1988 to pursue opportunities in the very specific field of architectural plaster conservation. We address and repair the structural problems of fragile plaster in historic buildings.

Over the years, we have developed and patented an array of specialty products, techniques and tools, designed to strengthen and re-attach existing plaster on ceilings and walls. We address the problem at its root – where the plaster meets its substrate.

Skilled Technicians

LaSalle River Canard Catholic Church

Consolidating fragile plaster

AD Premixed - Plain Face Plaster lug and Key Replacement

Testing plaster keys

Reattaching large plaster ornament

Remote Consolidation

 

Our specialty products and techniques are effective on the most elaborately embellished plaster and on the simplest plain face vernacular plaster. Traditional lime plaster on wood lath, cementitious plaster on expanded metal lath, plaster on masonry and even cast fibrous plaster suspended ceilings respond well to our conservation treatment programs.

Consolidating and Securing Failing Plaster in Historic Buildings

We specialize in addressing the systemic deterioration of plaster. Applied as a preventive maintenance procedure, our products economically extend the safe and maintenance-free service life of historic plaster ceilings – avoiding the tragedy of collapse and the huge expense of reconstruction. In short, we preserve original plaster.

Leading preservation architects and heritage consultants specify the HPCS approach in restorations where important plaster is at risk.

Featured Projects

Cathedral of the Immaculate Conception Saint John NB

Historic Plaster Conservation Services (HPCS) preserves the plaster at The Cathedral of the Immaculate Conception in Saint John NB.

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