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LP® TopNotch 350 Durable Sub-Flooring
LP Building Solutions

LP® TopNotch 350 Durable Sub-Flooring

Elevate structural stability

  • Recognized as carbon negative by ASTM in 2023
  • Available performance categories from 19/32 to 1-1/8*
  • Can be used for residential and light commercial applications
  • LP TopNotch Sub-Flooring panels are certified by the APA
Specification

  • Features and Benefits

    Performance

    • Incredible strength, stiffness and moisture resistance.

    Easy Installation

    • Self-spacing tongue and groove design speeds installation.

    Innovation

    • Designed for optimum moisture resistance.

    RainChannel® Technology

    • Unique RainChannel notch system to help drain rainwater away during construction.
Technical specification
  • Unique ref.lp-topnotch
  • Product familyBuilding materials
  • Product groupSmartSide®
  • TypeObject (single object)
  • Date of publishing2025-12-06
  • Edition number1
Links
Related
  • Material mainWood
  • Designed inUnited States
  • Manufactured inUnited States
Classification
  • BIMobject CategoryFlooring - Underlay
  • UNSPSC nameSiding and exterior wall materials
  • UNSPSC code301518
  • CSI MasterFormat 2014 Code09 74 13
  • CSI MasterFormat 2014 TitleWood Wall Coverings
  • OmniClass Number23-13 37 13
  • OmniClass TitleExterior Wall Cladding
  • CSI UniFormat II CodeB2010
  • CSI UniFormat II TitleExterior Walls

Region availability

South America North America
Brazil
United States
Chile

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