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putting plywood underlayment for shower, does it have to be 1 piece?

last month

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i'm putting in a 11/32" plywood underlayment on top of 3/4" subfloor for a 3' x 5' shower

i had a brain fart screwed in a piece of 3' x 4' underlayment already and realized there's a 1' x 3' gap. how bad is this? i'm just putting on schluter shower pan on top. will this be an issue and should i redo it and put in 1 piece of 3'x 5'? or is 3' x 4' + 3' x 1' fine? thanks!

i'm also planning on putting in self-leveling compound, will it matter?

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Comments (2)

PRO
GN Builders L.L.C
29 days ago
You don't need underlayment under schluter shower pan; it is structurally sound to be installed on top of the subfloor, so it doesn't matter.
modern_family thanked GN Builders L.L.C
3onthetree
28 days ago
It is fine to piece together underlayment. I am a proponent of using underlayment so that it accepts the thinset, rather than your structural subfloor. You will thank yourself during the next time you remodel. Not important here with a prefab Schluter pan, but for other applications a thicker subfloor can reduce the deflection as well.
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