LP SolidGuard LSL

LP® SolidGuard® LSL is a zinc borate treated product that protects against termites and fungal decay. When used in multi-story buildings, LSL helps mitigate shrinkage and reduces the risk of callbacks.

Product Benefits

Peace of Mind

Manufactured straight and stays, 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

Available depths: 3-1/2˝, 5-1/2˝

9-1/2˝, 11-1/4˝, 11-7/8˝, 14˝, 16˝, 18˝, 20˝, 22˝, 24˝

Available grades: 1.35E

Custom widths and lengths available upon request

Available in precision end-trimmed lengths upon request

Edges and ends are sealed to reduce swelling


treated lsl board

LP SolidGuard LSL at IBS

LP SolidGuard LSL at IBS 2014.

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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