The nation’s leading wholesale distributors of home improvement products and building materials saw an increase of 2.23% in 2011 sales, according to the research that produced the 2012 Home Channel News Top 100 Distributor Scoreboard.

It wasn’t easy.

According to the data culled from surveys, financial reports and estimates, the nation’s top 100 distributors produced a total of $40.263 billion in sales, compared with $39.385 billion in 2010.