You hired a crew to replace the windows in your older Chattanooga house. They pulled the first sash, saw the hard, chalky putty holding the glass in the wood frame, and stopped. Maybe they said they wanted it checked for asbestos before going further. That is a reasonable thing for a careful window installer to do, and it does not mean your house has a problem. It means nobody knows yet, and the fastest way to find out is a small sample sent to a lab.
Old windows are held together with materials that were mixed for durability. Glazing putty around the glass, the caulk between the frame and the siding, and the compound under the sill were all made by many companies over many decades. Some formulas included asbestos fibers to make them tougher and longer lasting. You cannot tell by looking. Putty that has dried to the hardness of a cookie looks the same whether or not it contains anything.
What worries a window crew is not the putty sitting in the frame. It is the work that comes next. Prying, chipping, sanding and scraping break a hard material into small pieces and dust, and fibers that would have stayed locked in place can end up in the air and on the floor of a room your family uses.
When a contractor halts a job and asks for a test, you have two good outcomes available and one bad one to avoid. The good ones are a negative result, so the crew goes back to work, or a positive result, so you plan the work around it. The bad one is pressure to keep going without knowing, or a quick scrape by someone who did not hear what the installer said. If the crew left their tools and said they would come back once you have paperwork, take that seriously and get the paperwork.
It also helps to understand that the answer can differ from window to window. A house that has had windows replaced in different decades, or a porch added later, can have more than one kind of putty or caulk. The sample plan should reflect that.
We test and report. We do not sell removal, so our result is not tied to whether you end up hiring someone to take the material out.
Keep the work area undisturbed. Do not scrape, sand or heat the putty to see what is underneath. Close off the room if the crew already pulled a sash, and do not sweep or vacuum the debris with a household vacuum, which can push fine dust back into the room. Wipe up with damp cloths if you must, and bag them. If a lot of material is already on the floor, tell us when you call so we can say what to do next.
A positive result does not mean a crisis. Many positive materials are left alone for years without trouble. It does change how the windows get done. Depending on the condition of the material and the scope of the job, your options usually include working around the putty, having the sashes removed intact for off-site handling, or hiring a licensed contractor to take the material out before the installers return. Your window company and the abatement contractor should agree on the sequence, and you may want a clearance check afterward. Our air testing and clearance page explains how that works.
People ask whether a 1970s house is probably fine or a 1950s house is probably not. Age is a clue, not an answer. Renovations, repairs and old stock used up later all muddy the picture. The only dependable answer is a lab result on the actual material.
If your window installer has stopped, call (423) 414-2862. We will ask a few questions about the house and the stopped job, explain what we would sample, and schedule the visit. For more about what we test in older homes, see our residential asbestos testing page, our pre-renovation inspection page, and the cost guide.
Free quotes over the phone in minutes. Lab results in 2–3 business days.
Call (423) 414-2862