The same is true for this search:

HOW TO INSULATE BASEMENT WALLS

My article, http://www.homeconstructionimprovement.com/how-to-insulate-basement-walls/ used to rank #1 for a very long time. That article is written by me, a professional/expert in the field.

Now you have:

#1 http://home.howstuffworks.com/home-improvement/heating-and-cooling/insulate-basement-walls.htm this article actually crashes IE which I find ironic seeing that must mean it's a great user experience heh?

#2 http://www.energysavers.gov/your_home/insulation_airsealing/index.cfm/mytopic=11470 This is a government site, lots of good information so no real complaint here.

#3 http://www.ehow.com/how_4907361_insulate-basement-walls.html ahh....ehow.....CRAP!

#4 is now my article. So Google here's another example of how your new algorithm produces 50% crap. Way to go!