Answers

There are companies that offer energy evaluations and some even use thermal imaging and a tool / process called a blower door reading / test.  This will help identify the cause and opportunities for correction.  You can do some easy items as well like ensuring all like plate covers have insulated pads behind the covers, check for insulation around your homes perimeter if you have an unfinished basement, check your homes exterior for small gaps or holes left from old utilities and service work performed over the years.  Best of luck!

The best move would be to simply make sure the existing vapor barrier product is installed properly (flush to ceiling below) and add blown insulation over top to to get the best R value and at the least expense.

No need for s econd mositure barrier which is what the paper-face is. Just roll out unfaced insualtion atop the existing. Or, as an option, rent a blower and use loose-fill insulation. 

Rockwood insulation should do the job

You can call an expert.

Search for a door protection kick plate. This will cover current damage and protect for any future...

Depending on what year your house was built, you might have asbestos in that popcorn ceiling. Typically, anything older than 1979 is a good chance that it could have asbestos; our company regularly finds that with popcorn ceilings. We always send a environmental hygenist out to our jobs to confirm whether or not a house is "hot" for asbestos. It's preventative protection for our workers.

Removing popcorn ceilings requires a lot of preparation to prevent contamination of the other areas of your home. You will need to cordon off the area (room) with some kind of plastic covering the walls, floor, and entry area - this is for your own protection. Also, you will need to wear personal protective equipment including a tyvex type of suit that covers you from head to toe, gloves, safety glasses, and most importantly - a respirator. These things are necessary to keep you safe from breathing in the microscopic fibers of asbestos and preventing you from getting asbestosis or mesothelioma (a tumor of the mesothelium, often malignant and thought to be caused most commonly by the inhalation of asbestos particles.)

John,

If it is a small repair, you may want to test out a product at Lowes.  Homax ceiling texture.  I'd suggest trying it on a scrap piece of drywall (make sure it's at ceiling height for testing).  Jayme and Phillip both had great ideas.  Perhaps yet another would be to just remove the popcorn all together.