This week, 3 Building Products stocks are improving their overall ratings on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

The rating of Trex Company, Inc. (TREX) moves up this week, rising from a B to a A. Trex Company, Inc. is a manufacturer of wood-alternative decking, railing, fencing and trim products. The company also gets A’s in earnings growth and return on equity. For more information, get Portfolio Grader’s complete analysis of TREX stock.

This week, Simpson Manufacturing Co., Inc.’s (SSD) ratings are up from a B last week to a A. Simpson Manufacturing Co., Inc. engages in the design, engineering, manufacture, and sale of building construction products. The company also gets A’s in operating margin growth and earnings revisions. For more information, get Portfolio Grader’s complete analysis of SSD stock.

NCI Building Systems, Inc. (NCS) shows solid improvement this week. The company’s rating rises from a B to a A. NCI Building Systems, Inc. designs, manufactures, and markets metal engineered building systems and products for the building industry. The company also gets A’s in operating margin growth, earnings growth, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of NCS stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.