News & Stories8 min

Specifying 1 Hour Fire-Rated Walls

For about a century, architects and builders have used gypsum panels in wall assemblies to meet the criteria for 1 hour fire-rated walls. As product engineering develops, more and more architects are now looking for product solutions that bring added value to their 1 hour fire-rated walls. Many are specifying LP® FlameBlock® Fire-Rated OSB Sheathing because it meets code requirements for fire resistant construction while providing faster and easier installation than assemblies that use exterior gypsum and structural panels. They can also provide added design flexibility by reducing wall thickness.

LP FlameBlock sheathing can be used in a few different 1 hour fire-rated wall assemblies, including:

V340: This assembly is commonly used in 1 hour exterior walls along the property line, including single-family construction. This assembly allows for 2x4 wall construction and is fire-rated for 1 hour from both sides. 

LP FlameBlock V340 1-Hour Wall Assembly

Intertek Design LPB/WPPS-60-01This Intertek-listed assembly is commonly used in 1 hour exterior walls along the property line, including single-family construction. This assembly is fire-rated for 1 hour from both sides. 

LP FlameBlock Intertek Design LPB/WPPS-60-01 Wall Assembly

UL Design U348: This UL-listed assembly is commonly used in Type V multifamily construction in load-bearing exterior walls. It also allows for the use of fiberglass insulation. This assembly is fire-rated for 1 hour from the interior side only, except when brick and stucco is the exterior facing.

LP FlameBlock UL Design U348 Wall Assembly

When specified for these 1 hour fire-rated assemblies, LP FlameBlock sheathing reduces wall thickness versus common alternatives that use gypsum and structural panels. It also provides better substrate for securely fastening exterior facing materials. LP FlameBlock sheathing has an Exposure 1 classification—which signifies that panels are intended to resist the effects of moisture on structural performance during active construction. The fire resistance of LP FlameBlock sheathing is not impacted by exposure to moisture during construction.

Fire-rated walls shouldn’t interfere with your design capabilities and construction schedules. Check out our LP FlameBlock page to learn more about the V340, U348 and WPPS-60-01 assemblies.

Continue Reading
Business Advice4 min

Choosing Materials: Best Siding for Cold Climates

January and February typically usher in the season’s coldest temperatures, bringing the need to use building materials that can withstand frigid temperatures with them. However, it’s often the freeze/thaw cycle––cold days followed by quick warm-ups––that can cause significant damage to a home’s siding. So, what is the best siding for cold climates to combat this?

Continue Reading
Business Advice4 min
Best House Sheathing for Cold Climates

With temperatures dropping, insulation and protecting new construction against the elements are top of mind. Of course, builders must consider how insulated wall sheathing can help meet code requirements and contribute to the overall performance of the building envelope. However, they must also carefully consider potential moisture problems both during and after the build and the potential impacts of freeze/thaw cycles. With the season of potential hard freezes followed by fast warm-ups upon us, let’s explore methods for choosing the best house sheathing for cold climates.

Business Advice5 min
Building a House During Winter: Cold Weather Construction Safety Tips

With housing demand at an all-time high, builders do not have the ability to halt home construction during the winter months. Builders can work safely year round, even building houses during winter with planning and preparation. Advanced products and installation methods allow work to be performed during wet and very cold temperatures, but builders also need to consider winter safety for construction workers.

Business Advice4 min
Engineered Wood Siding in Multifamily Developments

Engineered wood siding has long been considered a trustworthy exterior product for single-family homes, but it is often overlooked for multifamily and commercial construction. LP® SmartSide® products are versatile enough for a range of builds beyond traditional single-family homes. Take a look at the homes featured in Madison Parade of Homes for siding inspiration and to see how LP SmartSide Trim & Siding might suit your building needs.