Inspiration2 min
How Fire-Rated OSB Outperforms FRT Plywood
Both fire-rated OSB and Fire Retardant Treated (FRT) plywood are commonly used in fire-rated wall sheathing and roof deck applications. Because these materials are always evolving, it’s good for architects and builders to know how they compare to each other.
An engineered wood product like LP® FlameBlock® Fire-Rated Sheathing combines a layer of ignition-resistant, cementitious coating with a layer of OSB. It carries an Exposure 1 classification, which means it can withstand normal exposure to moisture during construction. In contrast, some fire-retardant treatments are applied after the plywood is manufactured – and the treatment is sometimes water-soluble, requiring it to be protected from moisture during construction.
A fire-rated OSB product like LP FlameBlock offers both flame-spread resistance and burn-through resistance in the same panel, as verified in tests like the 30-minute Class A Flame Spread Rating (ASTM E84, UL723) and 15-minute Thermal Barrier Protection test (UBC 26-2). FRT plywood has a flame spread rating, but no rating for burn-through resistance.
Fire-rated OSB sheathing has load/span and shear design values that are superior to FRT plywood at the same thickness. In addition, engineered wood sheathing reduces dead load and wall thickness versus FRT plywood. This gives architects more flexibility in designing wall openings, plus more options in framing and bracing to meet structural requirements.
When architects specify fire-rated OSB sheathing, it’s important for builders and subcontractors to “respect the spec” and stick with a material like LP FlameBlock that has so many advantages over FRT plywood.
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Resiliency Solutions
5 minIntroducing LP® SmartSide® ExpertFinish® Naturals Collection™: Nature-Inspired Beauty Meets Engineered Performance
We’re excited to introduce the LP® SmartSide® ExpertFinish® Naturals Collection™, a bold new addition to our trusted line of engineered wood siding and trim that delivers the warmth and beauty of nature with the advanced protection and performance builders and homeowners expect.
Labor Solutions
5 minChoosing the Right LP® Structural Solutions Product for Your Build
When it comes to building strong, reliable, and high-performing structures, the materials you choose matter. At LP Building Solutions, we understand that every project, whether it’s a single-family home or a multifamily development, requires structural components that meet your needs for strength, durability, and efficiency.
Sustainability Solutions
5 minBuilding a More Sustainable Future with LP Building Solutions
In today’s world, sustainability is no longer just a buzzword, it’s a blueprint for responsible living and smarter building. As the construction industry seeks ways to reduce its environmental footprint, LP Building Solutions is focused on providing innovative building materials for eco-conscious builders to help reshape what it means to build sustainably
News & Stories3 min
History of Partnership with Gary Sinise Foundation
The LP Foundation is a proud partner of the Gary Sinise Foundation, which supports wounded veterans in several ways. You can learn more about the LP Foundation here.