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Recommended Layouts
Note: Shower pan areas referenced below DO NOT include GoBoard Curb.
5. Tub to shower conversion shower pan area using 3 – 48" x 48"
GoBoard Wedges.
a. Drain location shown below is based on a typical 32" x 60"
tub area and the maximum length of GoBoard Wedge.
b. The 32" width pan width can be increased up to 48"
requiring 4 – 48" x 48" GoBoard Wedges.
6. Curbless tub to shower conversion using 4 – 48" x 48"
GoBoard Wedges.
a. The dimensions above are for when the subfloor is lowered
by 5/8" using blocking or other means.
b. Drain location is centered and up against back wall.
c. Other curbless layouts are possible with the size depending
on level of shower pan area versus adjacent floor.
d. For all curbless installations it is recommended the adjacent
floor area be waterproofed with GoBoard following the floor
installation procedure at www.jm.com/goboard.
Johns Manville | 717 17 Street | Denver, C0 80202 | (866) 426-5015 | johnsmanville.com
(continued)
32"
32"
8 3/8"
8 3/8"
Johns Manville
Building Insulation Division
717 17th Street
Denver, CO 80202
1-800-654-3103, www.JM.com/GoBoard
8-ft x 8 ft durable, lightweght, warterproof backer board
Limited Warranty–Visit JM.com/GoBoard for warranty information
48"
48"
60"
60"
60"
60"
12
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