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Home Forums Other OT: length of lifetime for different decades built houses

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  • #18415
    #655851
  • May need earthquake retro.
  • Old wiring.
  • Probably galvanized piping instead of copper (can get plugged up with calcium salts)
  • Watch out for work where both copper and galvanized is used (dissimilar metals create galvanic action which corrodes the pipe)
  • Possibly real roughsawn 2x4s
  • Possibly Lath and Plaster vs wallboard (quieter house, improves insulation).
  • Fiberglass insulation standards are not a good.
  • 1970’s late

  • Some earthquake retro may be needed.
  • Switch from Lath & Plaster to wallboard.
  • Construction started switching over to copper piping, watch out for flexible plastic plumbing – it was at its infancy and had problems. Type often used was polybutylene(PB)
  • 2x4s no longer 2″ by 4″.
  • Slight insulation requirement improvement, windows still a problem
  • Start of large scale housing dev, keep an eye on manufacturer defect patterns on developments
  • 1980s

  • Earthquake retro needs may be limited to how waterheaters are mounted etc.
  • Large scale housing dev, keep an eye on manufacturer defect patterns on developments.
  • Because of problems of PEX plumbing, fewer manufacturers used it from this point on. Watch out for ‘do-it-yourself-ers’ though.
  • Shear-walls went from angled 1x12s to 4×8 plywood sheets, particularly on lower floors of multi-story. Significant improvement on rigidity/shear strength/earthquake resistance
  • Starting to see pre-stressed concrete garage floors, prevents cracks but do not drill into them.
  • 1990s

  • Start of ‘imported’ cheaper labor – with all that it brings.
  • Large scale housing dev, keep an eye on manufacturer defect patterns on developments.
  • Improved insulation requirements.
  • Almost entire outside of house is now ‘wrapped’ as a shear-wall.
  • Pre-stressed concrete garage floors, prevents cracks but do not drill into them.
  • Improvements in flexible plastic plumbing. Transition to Cross-linked polyethylene (PEX). One advantage of plastic plumbing is that it is more resistant to breakage under freezing conditions. On the other hand, doing it right is an issue – too many amateurs.
  • More info on Polybutylene(PB) plumbing:

  • Polybutylene has been involved in several major class action settlements.
  • Over a billion dollars has been paid from settlement funds.
  • Some hazard insurance companies will no longer insure homes piped with this product.
  • Some home warranty companies exclude PB leaks from coverage
  • There is more.. but gotta get working on some other stuff right now..

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