Asbestos in Old Window Putty: What to Know
Homes built before the early 1980s sometimes have original window glazing putty that was manufactured using asbestos.
Why Asbestos Was Used in Older Building Materials
Asbestos was valued for decades in construction materials for its durability and heat resistance, and it showed up in a wide range of products beyond insulation, including some glazing compounds and putties used to seal glass into window frames.
Why This Matters Specifically for Older San Clemente Homes
Homes and buildings constructed before the early 1980s, when asbestos use in many building materials began being phased out, may still have original window putty that’s never been tested or replaced. This is purely an age related consideration, not something specific to any particular builder or design.
What Actually Creates Risk
| Situation | Relative Concern |
|---|---|
| Undisturbed original putty | Lower, but worth knowing about |
| Routine glass cleaning | Minimal, doesn’t involve the putty itself |
| Scraping or sanding during a DIY renovation | Higher, disturbance is the actual risk factor |
| Window replacement or frame removal | Requires proper precaution or professional handling |
Why Routine Cleaning Isn’t the Concern Here
Standard window cleaning focuses entirely on the glass surface and doesn’t involve scraping, sanding, or otherwise disturbing the surrounding putty or glazing compound, the same careful approach used for older homes with original frames. This is a renovation and remodeling consideration, not something a normal cleaning visit would trigger.
What to Do If You Suspect Older Putty
- Avoid sanding, scraping, or aggressively disturbing visibly old glazing putty on a pre-1980s window
- Have the material tested by a qualified professional before any renovation work begins in that area
- If testing confirms asbestos content, use a licensed abatement professional for removal rather than a DIY approach
- Mention known original windows to any contractor working on trim, frames, or repainting nearby
Why This Is Worth Knowing, Not Panicking Over
The presence of asbestos in an older material doesn’t mean immediate danger, it means informed caution before that specific material gets disturbed. Many homes with original 1960s, 70s, or early 80s windows have putty that’s been sitting undisturbed for decades without incident.
Know Before You Disturb It
If you own or are renovating a home from this era, it’s worth knowing that original window putty is one of the materials that occasionally contained asbestos. The practical takeaway is simple: leave undisturbed putty alone unless you’re planning renovation work, and have it professionally tested before that work begins. The same age related caution applies to old painted window frames, which can contain lead.
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ClearCraft Window Cleaning focuses entirely on the glass, never disturbing frames or glazing, safe for homes of any age across San Clemente.