by redmondjp » Thu Oct 29, 2009 2:27 pm
Answer: it depends.
Advantages of newer houses include better energy efficiency such as 6" thick exterior walls, double-pane windows, and much better seismic design.
Disadvantages of many newer houses include PEX plumbing, use of chipboard (OSB) for wall and roof sheathing, spliced-together joists, lots of glue-impregnated wood products (so will off-gas more than earlier houses built using solid wood products).
My 1977-built house has 2x4" exterior walls with vertical cedar lap siding (so lots of cracks for exterior air to get into walls) and single-pane aluminum-frame windows. It leaks heat like crazy. My walls are basically sitting on the subfloor, so in an earthquake I expect everything from the walls up to jump up and come down a few feet away from the previous location. The sill plate is bolted to the foundation and that's it. The good thing is that it has copper supply plumbing (albeit with tin-lead solder).
I would agree with previous posters, no clear answer one way or another, best thing is to get a really good home inspector who knows what "quality" looks like (ie can distinguish if a house has good "bones" and mechanical systems installed).
Fighting off Affluenza on the Eastside since 1995