· by Michael Blair, Nashville's Remodeling
Nashville has a great deal of pre-war and mid-century housing stock, and in a house built before 1978 both lead paint and asbestos-containing materials are reasonable assumptions rather than remote possibilities. Undisturbed they are largely inert. Sanding, cutting and demolition are exactly what changes that.
Where each one actually lives
Lead paint is most concentrated on surfaces that were painted with durable enamels: window sashes and sills, door frames, trim, stair rails, porches and exterior siding. Friction surfaces are the concern, because opening and closing a painted window grinds paint into dust.
Asbestos appears in a wider range of materials than most people expect: floor tile and the black mastic under it, sheet vinyl backing, pipe and duct insulation, textured ceiling coatings, some joint compounds, cement siding and shingles, and older roofing felt. Nine by nine inch floor tile in a Nashville basement is a classic.
What the rules require of a contractor
Federal renovation rules require firms working for compensation in pre-1978 housing to be certified and to use lead-safe work practices where painted surfaces will be disturbed above a small threshold. That means containment, no open-flame or high-heat removal, specified cleaning, and written information provided to the owner before work starts.
These rules apply to contractors rather than to homeowners working on their own house, which is a legal distinction and not a safety one. The dust behaves identically. A contractor who has not mentioned lead-safe practices on a 1940s Nashville house has either not thought about it or is not certified.
- Assume lead paint in anything pre-1978 until tested
- Certified firms and lead-safe work practices are required for paid work
- Never dry sand, torch or heat-gun old paint at high temperature
- Asbestos must be identified by laboratory testing, not by appearance
- Undisturbed intact material is generally best left alone
Testing, and when it is worth it
Lead can be checked with a screening kit or, more reliably, by an inspector with an x-ray fluorescence analyzer or by paint chip sampling. Asbestos cannot be identified by looking at it and requires laboratory analysis of a sample, which is inexpensive per sample and definitive.
The economics favor testing before a project rather than after. Finding out mid-demolition means stopping a job that is already open, which costs far more than a handful of samples would have. Testing the specific materials you intend to disturb, rather than the whole house, keeps it proportionate.
The households where this matters most
Young children, because lead affects developing nervous systems at levels that do nothing to an adult, and because small children put hands and objects in their mouths in rooms where dust settles. Pregnant occupants for the same reason.
That is the argument for containment and for staying out of the work area rather than living alongside it. If a family with young children is renovating a pre-war house, moving out for the dusty phase is the single most protective decision available, and it is worth planning into the schedule rather than deciding in week three.