HELIOS ART GLASS

Helios Art Glass

Stained glass conservation, restoration & architectural commissions

instagram-new

Author: connie

Restoring a Historic Stained Glass Dome From Boston to Carmel

Posted on by connie

Historic stained glass often carries a complex history, shaped by relocation, adaptation, and at times unintended damage. A recent project in Carmel, California exemplifies how improper installation and environmental exposure can compromise even the most robust glasswork—and how careful stained glass restoration can recover both its structure and visual impact.

Originally designed for the lobby of a Boston bank, this large stained glass dome was later transported to California and installed in a private coastal residence in the 1980s. During that transition, the dome was cut in half to accommodate the new architectural setting. While the adaptation allowed the piece to continue functioning as an architectural feature, it also introduced long-term vulnerabilities.

Environmental Exposure and Compounding Damage

For approximately four years, the stained glass was left exposed to the elements—an especially damaging condition in a coastal environment like Carmel. Salt air, moisture, and temperature fluctuations accelerated deterioration across both the glass and the lead structure.

Subsequent attempts to “protect” the piece created additional problems:

  • A silicone coating was applied over much of the glass surface
  • Plexiglass was installed over the panels without proper ventilation
  • Moisture became trapped, increasing internal stress and accelerating damage

These conditions led to significant issues requiring architectural glass restoration, including:

  • Cracking and weakening of glass
  • Compromised lead came and structural instability
  • Visual distortion due to coatings and trapped condensation

At this stage, the dome required far more than standard stained glass repair—it demanded a full stained glass conservation strategy.

Restoration Approach: Removing Damage, Preserving History

The restoration process began with careful removal of the panels and a detailed condition assessment. Because of the silicone coating and environmental damage, the project required both technical precision and conservation sensitivity.

Key phases included:

Silicone Removal and Surface Recovery
 Removing the silicone without damaging the original glass required controlled, methodical techniques. This step was critical to restoring clarity and allowing the glass to interact properly with light.

Disassembly and Cleaning
 The panels were fully disassembled to address internal damage. Each piece of glass was cleaned using conservation-grade methods, preserving original textures and coloration.

Leaded Glass Restoration
 The deteriorated lead structure necessitated extensive lead came repair and, in many sections, full stained glass re-leading to restore stability.

Glass Matching and Replication
 Where original glass could not be salvaged, stained glass replication/reproduction was performed using materials selected to match the original design, color, and translucency.

Stained Glass Structural Repair
 Given the dome’s architectural function, reinforcement was essential. Structural improvements were integrated to ensure long-term durability, particularly in a coastal environment.

Reinstallation and Long-Term Protection

A critical component of this project was correcting previous installation issues. Unlike the earlier plexiglass covering, the reinstallation incorporated proper ventilation and protective glazing systems to prevent moisture buildup—aligning with best practices in heritage glass preservation.

The restored dome now functions as both a structural and artistic centerpiece, with light once again passing cleanly through the glass as originally intended.

Lessons in Preservation

This project highlights several key principles in historic stained glass repair:

  • Improper protective measures can cause more damage than exposure alone
  • Ventilation is essential when installing protective glazing systems
  • Conservation-first approaches preserve both material and historical value

As experienced art glass conservators in the San Francisco Bay Area, projects like this reinforce the importance of combining technical expertise with architectural awareness—particularly when working on complex features like stained glass domes and skylights.

Professional art glass conservators in the San Francisco Bay Area restoring a historic window with precision.

Restoring Kingdom Builders Reconstructing a Storm-Damaged Ecclesiastical Window

Posted on by connie

Storm damage presents a distinct challenge in stained glass restoration, often combining structural failure with widespread material loss. At Kingdom Builders Church in East Oakland, a 1910 stained glass installation suffered severe damage when high winds caused one of its primary windows to fail, scattering glass both inside the sanctuary and outside the building.

What remained was not a single broken panel, but a fragmented system—requiring a comprehensive approach to historic stained glass repair, stained glass conservation, and detailed reconstruction.

Assessing the Damage

The most severely affected panel was a central figurative window composed of plated glass—two layers designed to create depth and richness of color. During the storm, much of this glass was blown inward onto the pews, while additional fragments were recovered from the exterior below the window.

The damage included:

  • Extensive loss of original glass across both plated layers
  • Structural failure of the lead came network
  • Fragmentation of key figurative elements, including the face of Christ
  • Missing sections requiring stained glass replication/reproduction

Given the scale of destruction, this project required full architectural glass restoration, not isolated repair.

Reconstruction: A Conservation-Driven Approach

After careful removal and transport to the studio, the restoration process began with documentation and sorting. Each fragment was cataloged and mapped using reference photographs to guide reconstruction.

The process involved:

Fragment Recovery and Puzzle Reconstruction
 All salvageable pieces were cleaned, stabilized, and reassembled—often requiring detailed “puzzle” work to align both layers of plated glass accurately.

Stained Glass Re-Leading and Structural Repair
 Due to the failure of the original support system, extensive stained glass re-leading and lead came repair were required to restore stability and proper alignment.

Glass Matching and Replication
 Missing sections were recreated through stained glass replication, with careful attention to color, opacity, and texture to ensure visual continuity within the composition.

Restoring the Face: Technical Precision and Artistic Fidelity

One of the most technically demanding aspects of the project was the conservation of the central figure’s face. The original glass had shattered into 13 pieces, with four sections completely missing.

This phase required a combination of glass art restoration and traditional painting techniques:

  • Matching the original painted glass in tone, linework, and translucency
  • Recreating missing sections through kiln-fired glass painting
  • Cutting and fitting new pieces to integrate seamlessly with surviving fragments
  • Stabilizing the reconstructed face through conservation-grade bonding methods

This work reflects the highest level of museum-quality stained glass conservation, where both artistic detail and structural integrity must be preserved simultaneously.

Reinstallation and Preservation

Once restored, the windows were reinstalled at Kingdom Builders Church, completing a full cycle of church window restoration. Reinforcement measures were incorporated to improve durability while maintaining the original design.

The result is a restored set of windows that retains its historical and spiritual significance—demonstrating how even severely damaged ecclesiastical stained glass can be recovered through careful conservation.

Why This Project Matters

Projects like Kingdom Builders highlight the importance of experienced art glass conservators in the San Francisco Bay Area when addressing complex restoration challenges.

This work reflects key principles of:

  • Stained glass preservation and conservation-first methodology
  • Historic building glass restoration for early 20th-century structures
  • Precision-driven stained glass structural repair

Even in cases of extensive loss, a disciplined restoration approach can recover both the visual and cultural integrity of historic stained glass.

Restoring Unity San Francisco Reviving Historic Windows in Hayes Valley

Posted on by connie

In the heart of Hayes Valley, the Romanesque Revival church at 240 Page Street stands as a lasting example of early 20th-century architecture in San Francisco. Designed by architect August Klahn and completed in 1909, the building carries more than a century of history—much of it expressed through its original stained glass windows.

By the time Unity San Francisco acquired the property in 2019, the six primary stained glass windows had fallen into a severe state of deterioration. Years of environmental exposure, aging materials, and structural fatigue had compromised both the visual clarity and physical stability of the glass. What followed was a multi-year effort in stained glass restoration, combining technical rigor with a commitment to historic stained glass repair and long-term preservation.

Understanding the Condition

Initial assessments revealed extensive issues common in aging leaded glass restoration projects:

  • Fatigued and failing lead came
  • Bowing and structural instability across panels
  • Cracked and missing glass pieces
  • Previous repairs that were no longer structurally sound

Given the condition, localized stained glass repair was not sufficient. The project required a full-scale architectural glass restoration approach to ensure both safety and historical integrity.

A Comprehensive Restoration Process

Over the course of two years, all six windows were carefully removed and transported to the studio for treatment. Each panel underwent a meticulous stained glass conservation process designed to preserve as much original material as possible while restoring structural strength.

Key phases of the project included:

Documentation and Disassembly
 Each window was documented in detail before disassembly. Full-scale rubbings were created to map the original layout, ensuring accuracy during reassembly.

Cleaning and Glass Preservation
 Individual glass pieces were cleaned using conservation-safe methods to remove decades of accumulated residue while maintaining original painted details and surface character.

Stained Glass Re-Leading
 Due to the condition of the original lead, full stained glass re-leading was required. A new lead came was installed to restore structural integrity while maintaining the original design geometry.

Glass Matching and Replication
 Where pieces were missing or beyond repair, stained glass replication/reproduction was carried out using period-appropriate materials. Careful color and texture matching ensured visual continuity.

Structural Reinforcement
 To prevent future bowing, the panels were reinforced as part of a broader stained glass structural repair strategy, aligning with best practices in heritage glass preservation.

Reinstallation and Architectural Integration

Following restoration, the windows were reinstalled into their original frames at Unity San Francisco. This phase required coordination to ensure proper fit, support, and environmental protection—key components of successful architectural restoration.

The result is a set of windows that retain their historic character while meeting modern structural expectations. Light once again filters through the glass as intended, restoring a central visual and spiritual element of the space.

Preserving San Francisco’s Architectural Heritage

Projects like Unity San Francisco underscore the importance of working with experienced art glass conservators in the San Francisco Bay Area. Historic buildings rely on specialized expertise to maintain original features, particularly when dealing with ecclesiastical stained glass and early 20th-century fabrication methods.

This restoration reflects a broader commitment to:

  • Stained glass preservation and conservation-first practices
  • Historic building glass restoration for architecturally significant sites
  • Maintaining the cultural and visual identity of San Francisco neighborhoods

By investing in proper restoration, Unity San Francisco has ensured that these windows will continue to serve the building—and the community for decades to come.

Restoring Stanford Memorial Church — Precision, Preservation, and a “Giant Puzzle”

Posted on by connie
Standford

When vandalism struck Stanford Memorial Church in 2021, the damage extended far beyond broken glass. Several of the church’s historic stained glass windows—originally designed by J&R Lamb Studios in the early 1900s—were shattered by wine bottles thrown with enough force to penetrate multiple layers of plated glass and deform the lead structure.

For Connie and the team at Helios Art Glass, the project was not simply a repair—it was an exercise in museum-quality stained glass conservation, requiring technical precision, historical sensitivity, and an extraordinary level of patience.

Assessing the Damage

The affected window, known as the “Lilies of the Field,” is part of a rare and cohesive body of ecclesiastical stained glass, where all windows were designed by a single studio—an uncommon distinction in church architecture.

The vandalism caused:

  • Breakage across three layers of glass, a defining feature of the church’s windows
  • Structural damage to the lead came network
  • Loss of original glass fragments, many of which were scattered or missing entirely

Unlike typical stained glass repair, this project required a full-scale architectural glass restoration approach.

A Giant Puzzle: The Conservation Process

Once the panels were removed and transported to the studio, the restoration process began with one of the most complex phases: reconstruction.

Every fragment that could be recovered was cataloged and analyzed. According to project collaborators, the process resembled assembling “a giant puzzle,” with each shard needing to be matched not only to its position in the design—but also to its correct layer within the multi-plated glass system.

The team’s workflow included:

  • Sorting and identifying fragments by panel and layer
  • Creating detailed rubbings to map cracks and missing areas
  • Stabilizing surviving glass through careful lead came repair
  • Reintroducing structural integrity through selective stained glass re-leading

In areas where glass was missing, the team employed a combination of:

  • Stained glass replication/reproduction using historically accurate materials
  • Custom color-matching to account for complex tones and translucency
  • Resin infill techniques for extremely small losses

Matching the original glass was particularly challenging, as many pieces contained layered hues—such as amber-pink tones—that vary in opacity and light transmission.

Balancing Restoration and Preservation

A core principle of the project was stained glass preservation—retaining as much original material as possible. Rather than replacing entire sections, the team focused on conserving existing glass, even when fragmented, to maintain historical authenticity.

This approach reflects best practices in:

  • Historic stained glass repair
  • Religious art restoration
  • Heritage glass preservation

Small interventions—such as adding minimal lead lines or stabilizing fractures—were preferred over full replacement whenever feasible.

Reinstallation and Return to Light

After months of meticulous work, the restored panels were reinstalled at the church. Scaffolding surrounded the structure as each piece was carefully returned to its original position, restoring both the visual continuity and spiritual atmosphere of the space.

The result was not a “new” window—but a faithful continuation of the original, where old and restored elements coexist seamlessly.

Why This Project Matters

The restoration of Stanford Memorial Church highlights the broader importance of architectural restoration specialists in preserving cultural landmarks. These windows have illuminated ceremonies, memorials, and daily life on campus for over a century, making their conservation essential to the building’s identity.

Projects like this demonstrate that stained glass restoration is not simply about aesthetics—it is about:

  • Preserving craftsmanship from another era
  • Maintaining the integrity of architectural history
  • Ensuring that future generations experience these works as intended

Connie Levathes, Tom Lehnartz and Robin Conner (left to right) from Helios Art Glass reinstall a panel of stained glass at Stanford Memorial Church after the window was vandalized and then repaired over the previous months.

Stained Glass Restoration Preserving Craftsmanship, History, and Light

Posted on by connie

Stained glass windows are more than decorative features—they are enduring works of art that reflect history, craftsmanship, and architectural identity. Over time, however, exposure to environmental stress, structural movement, and aging materials can compromise their integrity. Stained glass restoration ensures these pieces are preserved, repaired, and protected for future generations.

What Is Stained Glass Restoration?

Stained glass restoration is the process of carefully repairing and revitalizing damaged or aging stained glass windows while maintaining their original character. Unlike simple repairs, restoration focuses on long-term preservation and historical accuracy. This often includes:

  • Cleaning and stabilizing fragile glass pieces
  • Replacing broken or missing sections with historically accurate materials
  • Releading panels where the original lead came has weakened
  • Reinforcing structural integrity to prevent future damage

This process is essential for both residential and commercial properties, particularly those with older or historically significant glass installations.

The Importance of Architectural Glass Restoration

Many stained glass windows are integral to a building’s design. In these cases, architectural glass restoration goes beyond aesthetics—it preserves the structural and visual identity of the entire space. Churches, historic homes, and civic buildings often rely on stained glass as a defining feature.

Architectural restoration considers how the glass interacts with the surrounding framework, ensuring that repairs align with the building’s materials, age, and engineering. This holistic approach helps maintain authenticity while improving durability.

Addressing Historic Stained Glass Repair Needs

When working with older windows, historic stained glass repair requires specialized expertise. Glass produced decades or even centuries ago often differs significantly from modern materials in composition, color, and texture.

Key considerations include:

  • Matching antique glass types and pigments
  • Preserving original hand-painted details
  • Documenting and cataloging each piece before restoration
  • Following preservation guidelines for historically designated buildings

Proper restoration protects not just the window, but also its cultural and historical significance.

The Role of Leaded Glass Restoration

A critical component of many stained glass windows is the lead came—the metal framework that holds individual glass pieces together. Over time, lead weakens, bends, or corrodes, leading to structural instability.

Leaded glass restoration involves:

  • Removing deteriorated lead
  • Reassembling panels with new, reinforced lead cames
  • Waterproofing and sealing joints
  • Ensuring proper support to prevent sagging or bowing

This step is essential for extending the lifespan of stained glass windows and maintaining their safety.

Signs Your Stained Glass Needs Restoration

Property owners should consider professional restoration if they notice:

  • Visible cracks or missing glass pieces
  • Bulging or sagging panels
  • Loose or rattling sections
  • Water infiltration or frame damage
  • Faded or deteriorating paint details

Early intervention can significantly reduce the scope and cost of restoration.

Why Professional Restoration Matters

Stained glass restoration is a highly specialized craft that requires technical precision and artistic sensitivity. Attempting repairs without proper expertise can lead to irreversible damage or loss of historical value.

Professional studios use time-tested techniques combined with modern conservation practices to ensure each project meets both aesthetic and structural standards.

Preserving Light, Legacy, and Design

Whether in a historic cathedral, a vintage home, or a modern architectural space, stained glass continues to transform light into art. Through stained glass restoration, architectural glass restoration, historic stained glass repair, and leaded glass restoration, these works can be preserved in their full brilliance.

Investing in restoration is not just about repair—it is about protecting a legacy of craftsmanship that cannot be replicated.

Architectural Glass Restoration Protecting Historic Stained Glass and Leaded Windows

Posted on by connie

Architectural glass plays a defining role in many buildings, from historic landmarks to custom-designed homes. Over time, however, even the most well-crafted windows require attention. Architectural glass restoration provides a comprehensive approach to preserving these elements, combining structural repair with artistic conservation.

Understanding Architectural Glass Restoration

Architectural glass restoration refers to the repair and preservation of glass elements that are integral to a building’s design. This includes stained glass windows, leaded glass panels, decorative glazing, and other custom installations.

Unlike basic repair work, restoration focuses on:

  • Maintaining original materials whenever possible
  • Preserving the design intent of the architect or artist
  • Strengthening the window for long-term performance
  • Integrating the glass seamlessly with the surrounding structure

This approach ensures both visual continuity and structural reliability.

How Stained Glass Restoration Fits In

A key component of architectural work is stained glass restoration. These windows often serve as focal points, adding color, texture, and narrative to a space. Restoring them requires balancing preservation with performance.

Processes typically include:

  • Disassembling panels for detailed inspection
  • Cleaning and conserving original glass
  • Replacing damaged pieces with carefully matched materials
  • Releading and reinforcing the structure

Each step is performed with attention to detail to ensure the final result reflects the original craftsmanship.

Specialized Historic Stained Glass Repair

For heritage properties, historic stained glass repair requires additional care. Many historic windows were handcrafted using techniques and materials that are no longer widely available.

Restoration professionals must:

  • Source or replicate period-accurate glass
  • Preserve hand-painted imagery and unique textures
  • Follow local and national preservation standards
  • Document all restoration work for archival purposes

This level of precision is essential for maintaining authenticity and meeting regulatory requirements for historic buildings.

The Structural Importance of Leaded Glass Restoration

Leaded glass windows depend on a network of lead cames to hold their shape. As these materials age, they can weaken, resulting in instability or visible distortion.

Leaded glass restoration addresses these issues by:

  • Replacing deteriorated lead with new, stronger material
  • Realigning glass pieces to their original configuration
  • Adding structural supports where necessary
  • Ensuring proper sealing to prevent environmental damage

This process restores both the strength and visual clarity of the window.

When to Consider Restoration

Timely restoration can prevent more extensive damage. Indicators include:

  • Warping or sagging panels
  • Cracked or missing glass pieces
  • Air or water leaks around the window
  • Oxidation or deterioration of lead joints
  • Loss of detail in painted glass

Addressing these issues early helps preserve original materials and reduces long-term costs.

Benefits of Professional Architectural Restoration

Investing in professional restoration offers several advantages:

  • Extends the lifespan of historic and custom windows
  • Preserves architectural integrity and property value
  • Enhances energy efficiency and weather resistance
  • Maintains compliance with preservation standards

Experienced studios combine technical skill with historical knowledge, ensuring each project meets both aesthetic and structural goals.

Sustaining Architectural Heritage

Architectural glass is a critical element of design that bridges art and engineering. Through architectural glass restoration, stained glass restoration, historic stained glass repair, and leaded glass restoration, these features can continue to define spaces for decades to come.

Restoration is ultimately an investment in preserving both the beauty and the structural integrity of a building—ensuring that its character remains intact for future generations.