Mission

SERRA CHAPEL CONSERVATION PROJECT

Conservation of the Peregrine Chapel

Abutting the east side of the Serra Chapel, the Peregrine Chapel is a small room dedicated to Saint Peregrine, the patron saint of those suffering from cancer and other life-threatening diseases. In July of 2005, Mission San Juan Capistrano retained the services of Architectural Resources Group to conduct an in-depth investigation of the small side chapel, which was reconstructed during a restoration of the Serra Chapel in the 1920s (as seen in these historic photographs).

Before conservation work began, items of concern included settlement at the east end of the building (counteracted by an unsuccessful cable and beam system), wood decay of the roof system, and the negative effects of the exterior cement plaster on the historic adobe units.

Before

After

Before After

Before

After

Before After

Before

After

Before After

Peregrine Chapel

The hardness and low porosity of the cement plaster is incompatible with adobe, since it does not allow it to transpire moisture or “breathe.” Testing of the adobe in the Peregrine Chapel revealed high moisture content, especially in the bottom two courses, where there was loss of cohesive strength throughout the width of the walls. The Conservation Team removed the cement plaster from all exterior surfaces and replaced it with a softer, more compatible lime plaster, which was finished with a pigmented limewash formulated to complement the existing east wall of the Serra Chapel.


Peregrine Chapel

Peregrine Chapel

Following removal of the cement coating, the underlying adobe was assessed for strength and integrity. Loose and delaminated material was removed, while severely deteriorated adobe was replaced with new blocks.

Peregrine Chapel

Peregrine Chapel


Peregrine Chapel

A trench was dug around the perimeter of the Peregrine Chapel in order to install a French drainage system, which will re-direct sub-surface soil water away from the building.


Peregrine Chapel

Peregrine Chapel

Wooden components of the roof system were in poor condition; the ends of the sheathing were close to failure, as were some of the rafter tails and beams. Much of the damage was caused by termite activity and, to a lesser extent, water infiltration.

Peregrine Chapel

Peregrine Chapel

Peregrine Chapel Peregrine Chapel

Most of the existing historic wood was retained and repaired with an epoxy resin. Where damage of wooden components was extensive, replacement was necessary. The Conservation Team matched the new wooden elements in species as well as in existing shapes and profiles. In order to keep the roof water-tight, a new waterproofing membrane was installed and broken or missing tiles were replaced.





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Mission San Juan Capistrano Preservation Funds
26801 Ortega Hwy
San Juan Capistrano, CA 92675

For questions, please call Barb Beier at (949) 234-1323 or email bbeier@missionsjc.com
Mission San Juan Capistrano
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