Drafty Stained Glass Windows? Get Ready for Winter
/Quick answer: Drafty stained glass windows usually come from dried-out cement, cracked putty, loose lead or gaps in the frame, and most of these can be repaired without replacing the glass. The Glass Master, Steve Downing's studio in Thornton, CO, repairs stained glass for homes across the Denver metro. Call (303) 457-1886 before winter sets in.
Why Drafty Stained Glass Windows Happen
A leaded panel is made of many pieces of glass held in lead and sealed with cement. Over time, cement dries out, putty cracks and lead loosens. Colorado's temperature swings and wind add stress. Small gaps let cold air through.
Common Causes and Solutions
- Dried-out cement: can let air and water through the panel; re-cementing or re-leading may help
- Cracked or missing putty: the seal between panel and frame can be replaced
- Bowed or loose panels: may need reinforcement or re-leading
- Frame gaps and rot: the frame may need repair
- Single-pane glass: stained glass alone isn't strong insulation
Stained Glass Energy Efficiency and Protective Glazing
Some homeowners add an exterior protective glazing layer for stained glass insulation. It can help, but it should be installed properly and ventilated so moisture doesn't build up between the layers. Ask before adding it.
A Fall Checklist for Winterizing Stained Glass
- Look for light or gaps around the panel and frame.
- Feel for drafts on a windy day.
- Check putty for cracks or missing sections.
- Look for bowing or rattling glass.
- Check frames for rot or gaps.
- Call for anything structural before the cold arrives.
Doors and Sidelights Too
Leaded glass in doors and sidelights can loosen with years of opening and closing. A door conversion is another way to bring decorative glass to an entry.
What Not to Do
Don't fill gaps with household caulk, push on bowed panels, or use harsh cleaners. These can make a repair harder.
Steve's Approach
Steve will look at what's causing the draft and be honest about whether a repair will solve it. See work in the windows gallery.
Frequently Asked Questions
Why is my stained glass window drafty?
Most drafts come from dried-out cement, cracked putty, loose lead or gaps in the frame.
Can drafty stained glass be fixed without replacing it?
Often, yes. Re-cementing, new putty, frame repair or re-leading can solve most drafts.
When should I check my stained glass for winter?
Early fall is a good time, so any repairs are done before cold weather arrives.
Get Ready for Winter
About The Glass Master: The Glass Master is a custom stained glass studio owned by Steve Downing in Thornton, Colorado, serving Denver and the north metro, including Westminster, Northglenn, Broomfield, Arvada and Brighton. Phone: (303) 457-1886.
Call Steve at (303) 457-1886, 7am to 5pm daily, or send a message. Browse the stained glass gallery for ideas.
