This week, 5 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”).

Masonite International Corp. (DOOR) boosts its rating from a C to a B this week. Masonite International Corp. manufactures and markets interior and exterior door products worldwide. The company also gets A’s in earnings revisions, earnings surprise, and earnings momentum. For more information, get Portfolio Grader’s complete analysis of DOOR stock.

AAON, Inc. (AAON) gets a higher grade this week, advancing from a B last week to a A. AAON, Inc. manufactures and sells air-conditioning and heating equipment. The company also gets A’s in earnings revisions and return on equity. For more information, get Portfolio Grader’s complete analysis of AAON stock.

The rating of Quanex Building Products Corporation (NX) moves up this week, rising from a C to a B. Quanex Building Products Corporation manufactures engineered materials and components for the building markets. The company also gets A’s in sales growth, operating margin growth, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of NX stock.

Griffon Corporation (GFF) is seeing ratings go up from a C last week to a B this week. Griffon Corporation manufactures building products, specialty plastic films, and electronic information and communication systems. The company also gets A’s in earnings surprise. For more information, get Portfolio Grader’s complete analysis of GFF stock.

Tecogen Inc. (TGEN) earns a B this week, jumping up from last week’s grade of C. For more information, get Portfolio Grader’s complete analysis of TGEN 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.