Sealed joints. When installing a window in a tiled shower enclosure, make sure the joint between the jamb and the cementboard is sufficiently sealed with silicone caulk and a waterproofing membrane. The membrane bridging the two materials creates a stable substrate for the tile.
Your Window Design AndersenHomeDepot.com/design/saved/? ps=Cgebi7zCdD6rbPwF Window Color: White Trim Style: 4"/3" Jamb Flat w/ Sill Nose Trim Color: Black Grille: Prairie 6 Lite House Siding: Brown Vinyl This design available in: A-Series