** Shares of roofing materials maker TopBuild Corp BLD.N up 4.7% at $414.60

** Co acquires Specialty Products and Insulation (SPI) for $1 billion in cash

** TopBuild says transaction does not include SPI's metal building insulation business

** Co says transaction is immediately accretive to earnings per share

** Expects $35 mln to $40 mln in annual run-rate cost synergies

** As of last close, stock up ~27.27% YTD

(Reporting by Megha Kumari)

((Megha.Kumari@thomsonreuters.com;))