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Mortar bed shower liners play a
crucial role in shedding water from a shower floor, and directing it towards the
shower drain. Contrary to what some may think a ceramic tile floor is not
impervious to water. Water can easily leach through grout lines. If left
unchecked, water on a ceramic tile shower floor would continue to work its way
downwards, through the grout lines, on to wood subfloors and lower level
ceilings. A waterproof mortar bed shower liner prevents this from occurring, by
stopping and directing the water to the shower drain. |
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A mortar bed shower liner, as the
name implies, is constructed out of mortar. In addition, there is a flexible
shower pan membrane liner that is sandwiched in between the mortar.
To be more specific a mortar bed
shower liner is comprised of two layers of mortar. First a pre-slope mortar
bed is installed such that it creates a gentle slope towards the shower
drain. A flexible shower pan membrane liner is then installed on top of the
pre-slope. |
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A final layer of mortar, known as the
base layer, is then poured over the membrane liner to create the finished mortar
bed shower liner. Ceramic tile can then be installed over the mortar.
Installing a mortar bed shower liner
can be a little tricky, however handy do-it-yourself homeowners can tackle this
type of project with a little upfront knowledge. Creating the proper pre-slope
requires a bit of math and art skills. In addition, folding and fastening the
flexible shower pan into place can involve some origami skills.
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If done properly, however, a mortar
bed shower liner works extremely well and will last indefinitely.
Mortar bed shower liners can also be
designed for all shower stall shapes and sizes. They can even be constructed to
support shower seats.
When it comes to selecting the type
of flexible shower membrane liner material to use, you have basically two
choices. Your first choice is a waterproof membrane liner that is constructed
out of Chlorinated Polyethylene (CPE).
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It is a malleable and flexible
plastic material that can easily be molded into shape. It also holds its shape
well after folding it. A CPE shower membrane liner is the most commonly used
liner material in ceramic tile showers. Your second choice for a flexible shower
liner is constructed out of Polyvinyl Chloride (PVC). It is a more rugged
material than CPE, however it is more difficult to work with, as it is stiffer
and tougher to mold into shape. You can typically find either of these shower
pan membrane liners at any home improvement store. |
So if you are considering
installing a ceramic tile shower, make sure to install a mortar bed shower
liner first. Without it, your ceramic tile shower will undoubtedly leak and
cause water damage in your home.
See
My Shower Pan Ebook for More Details: For a more detailed set of
instructions on building a shower pan, including pictures and a detailed
cross-sectional view of the make-up of a shower pan, see my “Shower Pan Membrane
Liner Ebook”.
For more
information on tiling a custom ceramic tile shower, see the
How to Tile a Custom Ceramic Tile Shower Ebook
from HomeAdditionPlus.com. It provides detailed instructions for every
step in the process of tiling a custom ceramic tile shower and is loaded with
instructional pictures!
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