20907 Acorn Ave. Milton, Iowa • 641-675-3740
info@hersheystudio.com
Conservation And Preservation Of Stained Glass Nationwide
Call Hershey's Stained Glass Studio for your Stained Glass Restoration
Hershey's Stained Glass Studio is accredited by the Stained Glass Association of America
Hershey's Stained Glass Studio maintains the highest of  standards in restoration-relead, in situ restoration, new stained glass, lightboxes, faceted windows, and protective covering of your cherished windows.

The majority of stained glass windows were originally created to function as part of the envelope of the building. These windows have therefore been exposed to many harmful conditions which include extreme weather, wind load, vibration, ultra-violent rays from the sun, pollution (both indoor and outdoors), and damage from pigeons, bats, and various micro-organisms. The general environment also affects the deterioration of lead cames and frames, causing structural deterioriation of a stained glass window. Additional deteriorations factors may be expansion and contraction of the frames, settling of the building, vibration from building use and poor quality treatments and repairs

As a stained glass window ages, the condition of the lead came, cement, wire ties, and perimeter putty (sealant), which are the structural components of a stained glass window, deteriorates. For windows that have been fabricated with high quality materials and high quality craftsmanship, this deterioration process takes place gradually, over a very long period of time (80 to 100) years, and sometimes longer. Unfortunately, not all stained glass windows are made with high quality materials and craftsmanship, and not all stained glass windows have been repaired and restored in a high quality manner. At Hershey's Stained Glass Studio we use that centuries-old craft to restore your stained glass windows.

Below is a checklist of how to evaluate your windows for restoration:

Poor Quality Materials And Workmanship

  • Cement (waterproofing) is of poor quality, and has fallen out of the windows.
  • Lead came is soft (pure lead with little or no alloy) and is stretching,
    allowing the stained glass window to bow and buckle permanately.
  • The steel rebar structure is not adequate to support the stained glass window.
  • Perimeter putty (sealant has deteriorated and has not been maintained)
  • Windows have bowed and buckled to the point where the wire ties have pulled out of the solder, disconnecting the window from its steel rebar.
  • The stained glass window has been forcibly flattened to reduce bulges.

Restoration Grade Alloyed Lead Came Typically Consists Of:

  • 0.6 - 0.8% antimony
  • 0.6 - 0.8% tin
  • Trace amounts (0.03 - 0.06%) copper and/or silver (copper or silver is added to increase resistance to fatigue failure)

The use of restoration grade alloyed lead came assures that the restored stained glass window will have the longest service life possible.

Frame Problems

  • A metal ventilator frame is in poor structural condition and no longer provides adequate support for the stained glass panel that it contains.
  • A wood window frame has not been maintained (painted, caulked) allowing the frame to rot, and thereby weakening its ability to support the stained glass.
  • A masonry window frame has deteriorated and has not been repaired or maintained, thereby weakening its ability to support the stained glass window.

Installation Problems

  • A stained glass window has been installed into a wood or metal frame so tightly, that there is no room for expansion, thereby causing the window to bow and buckle prematurely.
  • A stained glass window has been installed into a masonry frame without any backer mterial in the glazing slot, which would allow for expansion. As a result, the window cannot expand and contract, and bowing and buckling occurs prematurely.
  • A masonry window frame has deteriorated and has not been repaired or maintained, thereby weakening its ability to support the stained glass window.

External Forces

  • The stained glass window has been exposed to excessive wind, rain, temperature fluctuations.
  • The vibration from heavy street traffic or from closing ventilators forcefully (slamming shut) can accelerate deterioration of stained glass windows.
  • The building settles, forcing frames and sashes out of square, putting pressure on stained glass panel edges.

Wood Consolidation

  • Rotten wood will be restored by replication wood components
    and Abatron wood epoxy.
  • The restored sashes will be primed using a liquid wood epoxy
    to seal the wood from moisture before painting.

At Hershey's Stained Glass Studio we use that centeries-old craft
in everything we provide for you the customer.

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