The crew arrived to put down new flooring. They pulled back a corner of the old carpet or lifted a strip of sheet vinyl, and underneath was a layer of dark, tar-like adhesive stuck to the subfloor. The installer looked at it, looked at you, and said they wanted it checked before going any further. If that is where your Chattanooga project sits right now, you are in a very common spot, and it is a reasonable thing for them to ask.
Many people hear "asbestos floor" and think only of the old square tiles. In older houses the adhesive underneath can be a separate material with its own history. Black mastic, the thick asphalt-based glue used to hold down tile, sheet goods and sometimes wood flooring in mid-century houses, was made for decades, and some of it contained asbestos. You cannot tell by looking. A black layer that is harmless and a black layer that is not can look identical, which is why a good installer stops instead of guessing.
The reason it matters is what happens next. Sanding, grinding, scraping or running a floor machine over mastic turns it into dust. That dust goes into the room and, in many houses, into the return air of the heating and cooling system. Left whole and covered, the same layer sits quietly for decades.
We take a small sample of the adhesive, usually from a spot that will be hidden again or that the crew has already exposed, and we send it to an accredited laboratory. A few things make the sample reliable:
The lab reports whether asbestos was found. If the answer is no, your crew can usually go back to work with that report in hand. If the answer is yes, you have a decision to make with real options rather than a stalled job.
That result does not mean the house is unsafe to live in. It means the material should not be sanded, ground or scraped by the flooring crew. The usual paths are:
Cover it. In many cases a properly prepared underlayment can go over intact adhesive, and the new floor floats or is fastened above it. This is often the least expensive way forward when the old layer is undamaged and the height change is acceptable at doorways and appliances.
Have it removed. If the new floor must be glued down, if the layer is crumbling, or if the floor is coming up for plumbing or structural work, removal by a licensed abatement contractor is the way to go. We do not do the removal; we test, and we can recheck the area afterward with air testing so you know it is clean before the new floor goes down. Our page on air testing and clearance explains how that works.
Leave it and work around it. If the floor is staying put and the question was only about a repair at the edge, a test tells you how careful the repair has to be.
Testing is usually the shortest part of the delay. The sampling visit is quick, and the lab turnaround is measured in days. Most of the schedule risk comes from guessing: a crew that sands an untested floor and then learns the answer afterward has turned a testing question into a cleanup. Waiting for a report is cheaper than that.
Old flooring is rarely the only older material in a house that age. If you are opening up a kitchen, a bath or a hallway at the same time, a broader pre-renovation inspection covers the floors, the walls and the ceilings in one visit. If you are only checking the floor, our residential asbestos testing page lays out how a sample visit works, and the floor tile guide covers the tiles themselves.
If your installer has stopped work in Chattanooga, call us at (423) 414-2862 or use the contact page, and tell us what the crew found and what they plan to lay next. We will tell you what to sample and how soon you can expect an answer.
Free quotes over the phone in minutes. Lab results in 2–3 business days.
Call (423) 414-2862