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Site Preparation
Fast Installation
Ultra-lightweight
Easy to cut, handle & install
Waterproof built-in*
• Install 1/2" (or 5/8") GoBoard to wall studs using
GoBoard Fasteners spaced every 8" or GoBoard
Washers spaced every 12" while leaving 1/8" gaps
between subfloor and bottom edge of GoBoard and
all board joints. Fill all gaps with GoBoard Sealant
and spread excess sealant with a putty knife at least
1" from either side of joint. For the joint near subfloor,
spread sealant roughly 2" up from subfloor. For detailed
instructions, visit https://www.jm.com/content/dam/jm/
global/en/tile-backer-boards/GB-001%20GoBoard%20
Installation%20Instructions.pdf.
* Only board joints and fastener locations require a
waterproof sealant.
2
Using measurements from the previous step, mark the center of
the drain hole. Cut a 5" diameter hole with jig-saw, hole saw or
other means. For remodels, ensure existing drain location fits
within the layouts and dimensions outlined on page 10 and 12.
Drain Assembly Installation
Important Information
• Make sure the waste pipe cannot be pushed
downward during GoBoard Point Drain assembly
installation. There are numerous methods to
secure the waste pipe, but the easiest method
is to place blocking underneath the drain pipe to
achieve correct distance from subfloor.
2
(1/2" or 5/8" GoBoard Purchased Separately)
1
Make sure floor is level (floor must be level for proper
installation). Find the center of the shower pan area (or as
close to center as framing allows). Please review page 10 for
possible layouts.
3
Top of waste pipe MUST be at least 1 5/8" below the top of the
subfloor. For remodels, cut existing waste pipe as needed with
inside pipe cutting tool.
©2019 Johns Manville. All Rights Reserved
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