Construction spending firmed in March reported the U.S. Department of Commerce today. The strength of the report was in the large upward revision to February's number, revised from -0.5% to 1.0%. March construction spending was up 0.3% from the higher February number. This strong construction spending number is a good sign for APOG, which makes and installs windows for skyscrapers. This positive construction data along with the strong pending home sales data from last week paint a picture of a firming housing market.