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NAC SAM 3 Sound Abatement & Crack Isolation Membrane, 3 ft Roll
T408149
$22999Unit price /Unavailable -
NAC ECB 75 Anti-Fracture Crack Isolation Membrane, 3 ft Roll
T408089
$23649Unit price /Unavailable -
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Johns Manville GoBoard 1/2 in Waterproof Tile Backer Board, 3x5 ft
T401063
$3699Unit price /Unavailable -
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Frequently Asked Questions
What goes under tile — in what order?
Structure first: a flat substrate (leveler if needed), then board or membrane (backer board, uncoupling, crack isolation, or sound control as the job requires), then thinset and tile. Wet areas add waterproofing before the tile layer.
Do I need underlayment over concrete?
Often yes: an uncoupling or crack-isolation membrane protects tile from slab cracks, a leveler fixes flatness, and condos may require a sound membrane. Bare, flat, crack-free slabs can be tiled directly.
Which backer board is best for a shower?
Foam boards (GoBoard, Kerdi-Board) are waterproof as installed and light to handle; cement board works too but needs a waterproofing layer over it. Either way, treat every seam and fastener.