LP SolidGuard LSL

LP® SolidGuard® LSL is a zinc borate treated product that protects against termites and fungal decay. LSL can be installed in direct contact with concrete, in interior applications only, and when used in multi-story buildings, LSL helps mitigate shrinkage and reduces the risk of callbacks. 

Product Benefits

Peace of Mind

Manufactured and stays straight, treated throughout with no need to field treat, and is free of knots and other naturally derived defects.


Provides a full wall plate solution for taller wood-framed buildings.


Available in common traditional lumber sizes and in long lengths.


Long lengths make it easy for continuous framing along walls.

Wood sourced through programs certified under the Sustainable Forestry Initiative®.

Product Specifications

  • Standard Sizes: 1-1/2"x 3-1/2" (2x4), 1-1/2"x 5-1/2" (2x6), 1-1/2"x 7-1/4" (2x8)
  • Grade: 1.35E
  • Edges and ends are sealed to reduce swelling
  • Please verify availability with the LP SolidStart Engineered Wood Products distributor in your area before specifying these products.


treated lsl board

LP SolidGuard LSL at IBS

See LP SolidGuard LSL at the 2014 International Builders' Show.

How It's Made

The LP® SolidGuard® LSL manufacturing process blends zinc borate throughout the product, eliminating the need for field treatment.

  • Made with sustainably harvested aspen and maple hardwoods for greater strength
  • Treated with zinc borate to resist termite damage and fungal decay
  • Edges and ends are sealed for additional moisture protection

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