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.
Continue Reading
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.
Business Solutions
4 minQ&A: How Home Orientation Impacts Continuous Insulation
There’s a lot to consider when it comes to building an energy-efficient home for your clients and the many nuances that change with each build—including its orientation to the sun. We sat down with Neil Freidberg, Building Science Manager at LP, to unpack the impact of home orientation on continuous insulation needs.
Resiliency Solutions
5 minHOW A RADIANT BARRIER CAN IMPROVE BURIED DUCT PERFORMANCE
One of the questions LP® Building Solutions gets from builders often is about burying ducts in attic insulation and whether combining radiant barrier sheathing with blown insulation over ductwork can benefit homeowners. As with most technical situations, the outcome depends on a nuanced approach. Let’s dig in and explore this question.
Sustainability Solutions
8 minHow to Drive Effective Communication and Collaboration on the Jobsite
Every jobsite has a ton of moving parts, from product shipments, supplies, and schedules to subcontractors and homeowners. It’s no wonder that many project teams can struggle to maintain quality jobsite communication and collaboration throughout the building process. And when communication slips, construction companies inevitably deal with costly errors, inefficient workflows, delayed projects, or wasted time, leaving clients and the team frustrated.