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Fire-Rated Wall Assemblies

LP® FlameBlock® Fire-Rated OSB Sheathing is a component of the following code-compliant fire-rated assemblies.

MultiFamily
Single Family

Exterior Wall Assemblies

UL Design No. 349
UL Design No. 349
UL Design No. W408
UL Design No. W408
UL Design No. V337
UL Design No. V337
UL Design No. V340
UL Design No. V340
Intertek Listing LPB/WPPS-60-01
Intertek Listing LPB/WPPS-60-01
UL Design No. U348
UL Design No. U348

Interior Wall Assemblies

UL Design No. 350 (Type A)
UL Design No. 350 (Type A)
UL Design No. 350 (Type B)
UL Design No. 350 (Type B)

Roof Deck Application

Roof Deck
Roof Deck
UL Design No. 349

(2-Hour Wall; fire-rated from inside)

UL Design No. 349
About the Assembly
  • Commonly used in Type III load-bearing exterior walls
  • Reduces dead load and wall thickness versus common alternatives
  • Eliminating a layer of gypsum reduces construction time and labor costs
  • Provides solid substrate for securely fastening exterior facing
  • Allows fiberglass insulation (less expensive than mineral wool)