Pro-Tile & Marble, Inc. Mapeguard 2 - Uncoupling membrane Our crew is beginning prep work on a 1,600 Sq. Ft floor today. After extensive grinding and leveling work they are almost complete with the uncoupling membrane installation. On this project we are using Mapei's Mapeguard 2 membrane which will stop any floor cracks up to 3/8s of an inch from transferring to the tile. This home had many large cracks and out of plane fractures on the existing concrete slab. This membrane will ensure our client never has to deal with cracked tile! Call us for more information 904-731-6471