Ever have water pipes that froze and burst? Or do you have sluggish hot water that chills you initially, even though you've already added foam-pipe insulation? Here's how to beef up the power of cold protection and your hot-water shower with do-it-yourself super-duper pipe insulation. If water pipes that already are wrapped with foam-pipe insulation (and have long runs through unheated crawl spaces) keep freezing and bursting or take too long to deliver hot water, slip a piece of corrugated 3-inch black plastic drain pipe around the problem water line and fill it with insulating spray foam. The "minimal expansion" type is best for this, as it won't over-expand and split the outer drainpipe. Your new super insulator should end freezing problems forever and get hot water to your shower without your having to wait for it. And that's the On The House tip for today.