Re: Concrete driveway
Around here, (Pacific NW) most new home contractors have a clause in the contract that says something to the effect of concrete WILL crack, and that they will only warranty concreted if there's cracking or shifting in excess of a certain amount.
It sound like here there was some problem with the composition or placement of the concrete, though placing concrete in cold weather isn't uncommon. I would tend to place blame on the contractor rather than the supplier. The suppliers understand and tightly control the manufacture of their product; they cannot control how the contractor places it. Especially since the contractor modified the recipe, I would suggest any fault lies with him.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.