Feature: MAPEI goes to Yale School of Management Over top of the pre-screed, the Atlantic Masonry crews applied Mapeguard 2 premium crack-isolation and sound-reduction membrane to protect the large-format tiles from cracking. Atlantic Masonry Project Manager Mike Coassin said cracking issues are becoming too common with the increase in tile dimensions in educational facilities, like the Yale proj- ect. Mapeguard 2 was utilized to prevent this. TileLetter | 2019 33