What to check in a 1970s house
Quick answer
Houses built in the 1970s (1970–1979) can carry 14 documented era issues, and 6 era boundaries fell inside the decade itself — so early-decade and late-decade builds differ. Pick your exact year below for the precise checklist, phase-in/out flags included.
Pick your exact year
Era issues active in the 1970s
| Issue | Active in decade | Category | Prevalence |
|---|---|---|---|
| Aluminum Branch Wiring Insurance flag | 1970–1973 only | Electrical | Common |
| Federal Pacific (FPE) Stab-Lok Panel Insurance flag | 1970–1979 | Electrical | Common |
| Zinsco / Sylvania-Zinsco Panel Insurance flag | 1970–1979 | Electrical | Occasional |
| Polybutylene (Poly-B) Pipes Insurance flag | 1978–1979 only | Plumbing | Common |
| Lead Water Service Line | 1970–1979 | Plumbing | Common |
| Orangeburg Sewer Pipe | 1970–1972 only | Plumbing | Occasional |
| Cast Iron Drains at End of Life | 1970–1975 only | Plumbing | Common |
| Lead-Based Paint | 1970–1978 only | Environmental | Very common |
| Asbestos-Containing Materials | 1970–1979 | Environmental | Very common |
| Vermiculite Attic Insulation | 1970–1979 | Environmental | Occasional |
| Urea-Formaldehyde Foam Insulation (UFFI) | 1970–1979 | Environmental | Occasional |
| Incomplete GFCI Protection (Code Era) | 1970–1979 | Code & Safety | Very common |
| Incomplete AFCI Protection (Code Era) | 1970–1979 | Code & Safety | Common |
| Outdated Smoke/CO Alarm Coverage | 1970–1979 | Code & Safety | Very common |
What changed during the 1970s
- 1970: Urea-Formaldehyde Foam Insulation (UFFI) entered common use (1970)
- 1972: Orangeburg Sewer Pipe was phased out (1972)
- 1973: Aluminum Branch Wiring was phased out (1973)
- 1975: Cast Iron Drains at End of Life was phased out (1975)
- 1978: Lead-Based Paint was phased out (1978)
- 1978: Polybutylene (Poly-B) Pipes entered common use (1978)
This is why two 1970s houses a few years apart can need different checklists — always use the exact year page.
Sources
- CPSC — https://www.cpsc.gov/safety-education/safety-guides/electronics-and-electrical-home/repairing-aluminum-wiring
- CPSC — https://www.cpsc.gov/Newsroom/News-Releases/1983/Commission-Closes-Investigation-Of-FPE-Circuit-Breakers-And-Provides-Safety-Information-For-Consumers
- Wikipedia — https://en.wikipedia.org/wiki/Zinsco
- InterNACHI — https://www.nachi.org/pb.htm
- EPA — https://www.epa.gov/ground-water-and-drinking-water/lead-service-lines
- Wikipedia — https://en.wikipedia.org/wiki/Orangeburg_pipe
- InterNACHI — https://www.nachi.org/life-expectancy.htm
- EPA — https://www.epa.gov/lead/protect-your-family-sources-lead
- EPA — https://www.epa.gov/asbestos/learn-about-asbestos
- EPA — https://www.epa.gov/asbestos/protect-your-family-asbestos-contaminated-vermiculite-insulation
- EPA — https://www.epa.gov/formaldehyde/facts-about-formaldehyde
- CPSC — https://www.cpsc.gov/safety-education/safety-guides/electronics-and-electrical-home/gfci-fact-sheet
- ESFI — https://www.esfi.org/arc-fault-circuit-interrupters-afcis/
- NFPA — https://www.nfpa.org/education-and-research/home-fire-safety/smoke-alarms