Key TakeawaysOwens Corning is buying door maker Masonite International for $3.9 billion to expand its product lines and brands.Owens Corning will pay$133 per share for Masonite, about a 38% premium to Masonite's closing price yesterday.Owens Corning CEO Brian Chambers said the deal will accelerate the company's long-term enterprise growth strategy.Shares of Masonite International (DOOR) surged to an all-time high after the door maker struck a deal to be bought out by building and construction materials man ...