TopBuild Corp. (NYSE:BLD) on Wednesday announced that it has finalized its purchase of Specialty Products and Insulation, better known as SPI, for approximately $1 billion in cash.The deal, completed on October 7, bolsters TopBuild's standing as a dominant player in mechanical insulation and specialty distribution across North America.The company funded the acquisition with existing liquidity and proceeds from its September senior notes offering.Also Read: Intel To Reportedly Unveil Details Of Upcoming Lapt ...