Brochure

Shower Pan Liner
Shower Pan Liner-7
3/25/18
Installation Instructions
PASCO Vinyl Shower Pan Liner is installed after the carpenters have finished the rough shower stall and dam. To provide
support for the shower pan material, blocking of 2” x 10”s must be placed between the lower end of the studs, forming the
shower stall. The outer face of the blocking must be flush with the studs, forming the shower stall. PASCO Vinyl Shower
Pan Liner works with a clamping flange-type drain made of either cast iron or plastic.
Figure 2: The lower flange of the drain must be braced or resting on firm material to prevent any upward or downward
movement.
1. Sloping Shower Stall Subfloor
To prevent puddling of moisture and to provide
a smooth base for the shower pan material, a
shower stall subfloor must be installed with a
slope toward the drain of a 1/4” fall per foot.
Figure 1: Construct the sloped subfloor using
a mortar mixture of 1 part portland cement to 4
parts sand. Staple a layer of 15 lb. roofing felt
to the subfloor of the shower stall. Cover the felt
with the mortar mixture and trowel toward the
drain. Be sure the drain is placed so that the
top half edge of the drain flange is level with the
top of the sloped subfloor. Figure 2: Allow the
sloped subfloor to dry before proceeding with the
installation of the shower pan liner. Be sure the
sloped subfloor is dry and free of any debris such
as nails, staples, etc. PASCO Vinyl Shower
Pan Liner can be applied directly to the sloped
subfloor surface.
2. Lining the Stall with the Vinyl Shower Pan Liner
Remove the top half of the shower drain. To insure a waterproof seal between the lower drain flange and the pan material,
apply a small ring of PASCO 1709 caulking on top of the lower drain flange. The ring of caulking must be on the outer
perimeter of the drain bolt holes, Figure 3. Do not plug the bolt holes or weep holes with caulk. IMPORTANT-Do not use
roofing mastic as a sealer around the drain. Measure the width and length of the stall area allowing 10 inches for each wall
and about 16 inches for the dam. The dam must be covered by the liner on the inside face, top and outside face. After
determining the amount of material needed, use a soft crayon or felt tip marker to draw a layout of the pan on the material,
Figure 4: Cut the material with a utility knife
and straight edge. Fold the pan material along
the layout lines and place it in the shower stall.
After the material is positioned in the stall, it can
be either stapled or tacked into place. Never
staple lower than three inches above the level
of the dam. Place the first staple in the pan
material to the backing board beginning in the
middle of the back of the stall. Proceed to staple
the material to the backing board at 2” intervals,
working towards either corner of the stall.*
*NOTE: Where metal studs are used and
no back-up material is provided, see Gang
Shower Installation Instructions.