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Lesson 15 of 18
a 30-second test before you sand or strip old paint tells you if you're about to make breathable lead dust.
- the three spots to check first: window sills, kitchen cupboards, exterior siding
- why sanding or power-washing painted surfaces spreads lead dust into air and yard
- why knowing the chemistry isn't the same as being safe
Watch first: Protect an area before you work
← The Lead Safe Journey
CASE Case Study · DetectLead
● Used on 10,000+ pre-1978 homes
Test before you sand.
Pre-1978 trim, old cabinets, radiator paint. A 60-second fluorescence test before the orbital sander comes out.
Test your stuff. Move on.
DETECTLEAD · DIYers, weekend renovators, old-home owners
You can out-think asbestos. You cannot out-think lead.
The weekend reno that took 20 years off.
Your grandparents bought the house before anybody knew. Your parents painted over it three times. You're the one with the orbital sander and the YouTube tutorial, and you're also the first person in this house's 80-year life who has any way of knowing what's in the top coat before you turn it into breathable dust.
What to look at, in order:
Window sill
The single highest-friction interior surface in any pre-1978 home. Sash sliding grinds the paint into sill dust every day for decades.
Kitchen cupboards
Sanded one weekend = years of breathable dust before the next coat seals it. Especially the inside surfaces nobody thinks to check.
Weatherboard exterior
Power-washing, dry-sanding, or stripping painted exterior cladding aerosolizes the paint into your lawn, garden, kid's sandbox, and every wet sock that comes inside afterward.
A husband-and-wife chemist couple in the archive scraped and heat-gunned the paint off their own house. Both of them were trained chemists who understood lead better than most people ever will. A few months later the wife was diagnosed with lead poisoning. They figured they could out-think it, and they were wrong.
The test that takes 30 seconds.
One drop on any glaze, paint, or surface. UV pen. Glow green = lead. Thousands of tests per kit.
Get the Full Fluoro-Spec Kit · $75Or just the Drip Tip · $50
Saw something in this you didn't know? Screenshot the part that surprised you, share it, tag @detectlead.
Test your stuff. Move on.
Stop reading. Start testing. One drop per object.
What you now know
The three things this lesson leaves you with.
- window sills wear fastest because the sash grinds paint into dust every time it slides
- sanding cupboards in a weekend can leave years of breathable dust behind
- power-washing or sanding exterior siding spreads paint dust into the yard and tracks inside
Quick check
Three questions to make it stick. Your answers carry into the final exam at the end.
1. Which interior surface does the page point to as the highest-friction spot in a pre-1978 home?
the page says window sills take the most friction because sash sliding grinds paint into dust every day for decades.
2. According to the page, what happened to a chemist couple who scraped and heat-gunned paint off their own house?
the page says the wife was diagnosed with lead poisoning a few months later, even though both were trained chemists.
3. Why does the page flag power-washing or dry-sanding exterior siding as risky?
the page says this kind of work spreads paint dust outside and it comes back inside on wet socks.
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