lumber needed to build homes. as cnn's bill weir shows us now, there might be a solution. >> reporter: if the definition of inflation is too many dollars chasing not enough goods, well, this is what happens when too many houses chase not enough wood. >> how would you characterize the price of lumber today? >> volatile. yeah, it is up and down. it got to the point we were just adding 20 to 30% just because and hopefully that would cover it. >> reporter: it's all they can talk about at the national association of home builders convention in orlando this week, starting with a sticker poll. >> down here is one person who said it's been 75%. at a normal time if the cost of a building material were to increase by 75%, people would be coming unglued. but look what it is, most of them are 200% or more. >> reporter: there are a few re reasons why, but the problem begins in the canadian rockies. the source of almost one in every three boards hammered into american homes and where a