[trekkor]

1 year is a pathetic warranty for a home.

Here it's a mandatory 10 year, enforced by the Contractor License Board.

One year gets you through ONE season. Light rain/no hard freeze and problems might not appear at all.

Side point for extra credit:

I was aware of a tract home scam many years ago.
After inspection, the builder would move the rebar to the next property before pouring the concrete driveway.

Every driveway "passed" inspection, yet contained ZERO steel.