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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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Business Advice4 min

Predictions for 2020 from LP Execs

The homebuilding industry is always changing, thanks to housing trends, shifts in buyer preferences, new technologies and even finance options. We recently sat down with Brad Southern, CEO of LP Building Solutions, and Mike Sims, LP’s SVP of Marketing and Business Development, to discuss the latest industry developments.

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Industry Trends3 min
Why Key Strategies for Reducing Labor Time May Be Backfiring

Many construction companies and remodelers have been sorely challenged by the shortage of skilled laborers. As more companies struggle to find good workers and juggle projects, many are thirsty for strategies that promise to trim time.

Business Advice4 min
Why Remodelers Should Switch to LP® SmartSide® Trim & Siding

Are you considering switching to LP® SmartSide® Trim & Siding? Many remodelers and installers are anxious about switching to a new product—even when they know, in their gut, that it’s the right move. If you’re worried about change, here are four questions to ask yourself: What are the advantages of the product? How quickly can I get my team trained? How will the change benefit my company and reputation? What is the availability of the products?

Outdoor Living3 min
Shed Builder Spotlight: Lapp Structures

Since its start in 1987, Lapp Structures has transitioned from producing standard sheds to making aspirational builds a core element of its business. Coining the term DreamSpaces™, Lapp Structures helps customers create unique shed builds where they can explore their hobbies without sacrificing the comfort of home. Due to its unmatched consistency, proprietary technology and extreme durability, Lapp Structures names LP® Outdoor Building Solutions® a key component to its success.