While installing floor tile is a relatively straightforward process, how well it holds up against cracking and other wear and tear depends on its underlying substrate. This area, which may be concrete or wood, should be inspected and modified as necessary before other project steps. One common modification is the installation of a crack isolation membrane, which the guide below explains in more depth.

What Is a Crack Isolation Membrane?

Although concrete seems solid and immovable, it expands and contracts due to outside forces like temperature and moisture. These imperceptible shifts—comparable to the horizontal motion of an accordion—can cause hairline cracks in the concrete. When floor tile is installed over concrete, these tiny cracks can extend into the grout or the tiles themselves. Fortunately, you can circumvent this problem by installing a crack isolation membrane. The thin, stretchy material moves with the concrete, preventing cracks from appearing on floor tiles. However, it should be noted that it only protects against damage caused by horizontal movement, not vertical shifting.

Crack isolation membranes are offered in sheets, which may be self-adhesive or dry-backed, or as a liquid that's brushed or rolled on. Some tile installation professionals use a trowel to apply a Portland cement-based product as the final layer of a concrete substrate. 

Crack Isolation Membrane vs. Uncoupling Membrane 

Some people use the terms "crack isolation membrane" and "uncoupling membrane" interchangeably, but they are different products. The first prevents cracks from the concrete substrate from transferring to the floor tile. An uncoupling membrane is applied to the substrate to create a separation between the tile and whatever is underneath. Installing the tile over this more-rigid membrane does reduce the risk of cracking and other damage to the surface caused by movement in the substrate. However, it also protects against moisture by creating a vapor barrier, which crack isolation membranes do not. Tile Outlet, Etc. carries Merkrete products to ensure your flooring investment is protected. Merkrete offers low VOC hydro guard load-bearing waterproofing membranes that offer the best solution for construction and remodeling projects that require positive waterproofing.

Protect your investment in floor tile by ensuring that the subfloor is properly prepared. Tile Outlet, Etc. in Rogers, MN, offers a wide selection of tiles, including stone, glass, porcelain, and ceramic options. They also provide design and installation services for professional results. With countertops, cabinets, and other flooring options, they can answer your home remodeling needs. Call them today at (763) 494-8663 to schedule a complimentary consultation, or visit their website to learn more about their products and special offers.