Whether it’s a townhome, a “tall and skinny,” an apartment complex or a zero-lot-line single-family application, finding the proper code-compliant fire-resistant-rated wall assemblies and UL fire-rated wall systems is often a challenge. Navigating UL wall assemblies can add another layer of complication. Ensuring the proper UL evaluated assembly to use grows more complicated depending on the project's size and scale.
In today’s building and code environment, it’s key for architects, engineers and specifiers to maximize space while maintaining the cost-effectiveness of the building's construction and design. There's a lot to know about UL fire-resistant assemblies and OSB assemblies, so let’s get started.
With these design challenges in mind, LP Building Solutions created LP® FlameBlock® Fire-Rated Sheathing for low- and mid-rise wood structures and light gauge steel framing. LP FlameBlock sheathing allows fire-resistance rated walls to be assembled faster than common alternatives, potentially reducing labor costs while providing exceptional strength, durability and consistency. Additionally, Exposure 1 classification signifies that LP FlameBlock sheathing is intended to resist the effects of moisture on structural performance during active construction.
UL fire-resistance rated wall assemblies with LP FlameBlock sheathing provide several benefits to architects, engineers, builders, developers, contractors and even homeowners. LP FlameBlock sheathing wall assemblies provide design flexibility by combining structural capacity and fire resistance in a single panel. It may eliminate a layer of gypsum to simplify and expedite the construction process. The cost savings may allow designers and builders to redirect the funds into design elements their clients are seeking, increasing the value of the property.
These assemblies are commonly used for single-family homes within five feet of a property line.
UL Design No. V340 (1-hour from either side)
UL Design No. U348 with stucco (both 1-hour from either side)
UL Design No. U348 with brick (both 1-hour from either side)
These assemblies are typically used in dividing walls in townhouses.
UL Design No. V340 (Two 1-hour walls, back-to-back)
UL Design No. U350A and U350B (Common 2-hour wall)
These assemblies are commonly used for Type III and Type V exterior walls.
UL Design No. V340 (1-hour from either side)
UL Design No. V340 (2-hour interior, 1-hour exterior)
When using UL Design No. V340 assemblies for Type III exterior walls, 2-sided LP FlameBlock is required.
UL Design No. V337 with gypsum and V337 with stucco (2-hour from either side)
UL Design No. U349 (2-hour interior)
UL Design No. U349 (2-hour interior, 1-hour exterior)
UL Design No. U349 (2-hour from either side)
Code compliance does not have to limit design flexibility, budget or schedule. LP FlameBlock Fire-Rated Sheathing assemblies offer code-compliant solutions for a variety of building needs, including plenty of assemblies by UL for fire-resistance rated wall systems. Additional assembly options, including steel studs, are available at LPCorp.com.
Do you have a project in the works? Check out best practices for choosing fire-rated OSB.
When beginning new construction, many builders often start with the mindset of using traditional or commodity OSB materials. However, when homebuyers demand certain elements to be built into their home-including sustainability, energy efficiency, resiliency and overall performance-builders often shift to designing with premium building materials.Continue Reading
Siding is often a top contender for homeowners looking for ways to refresh their brick exterior or expand their home-and they are looking to builders like you for guidance on how to best pair the two materials. Let's take a look at some popular ways to use engineered wood siding with brick and the best practices for installation of LP® SmartSide® Trim & Siding with brick.
In the construction process, there are many factors to consider. Among these factors is whether to use one-sided LP® FlameBlock® Fire-Rated Sheathing or two-sided LP FlameBlock sheathing. To help explain the reasons one assembly is used over another, we caught up with Scott Johnson, Manager, Construction Services at LP Building Solutions.
At LP, we value partnering with you to build your business. We seek to provide not only one of the most durable siding materials available, LP® SmartSide® Trim & Siding, but also the support you need to operate a thriving business with our product. That's why we're excited to announce that the LP® BuildSmart™ Preferred Contractor Program is now LP® Remodelers Edge.