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Business Advice5 min

The Importance Of Vapor Permeability In Building Envelopes

Since 1898, the American Society for Testing and Materials (now called ASTM International) has developed technical standards for a wide variety of building materials. They test for things like burn resistance. For weather-resistant barriers (WRBs), ASTM has developed rigorous tests for water resistance and water penetration, plus an air barrier assembly test. But an equally important test is ASTM E96, which measures water vapor permeability over a 24-hour period.

Even after exterior cladding goes up, walls can get wet. Small amounts of moisture in the wall turn to gas (water vapor) that needs to escape. If walls can't dry out thoroughly, the home is susceptible to mold and rot.

The term vapor permeability (sometimes called "breathability") refers to a material's ability to let water vapor pass through it. ASTM E96 measures this in units called "perms" - and today's building codes require WRBs to provide 5 perms or higher.

The Difference Between House Wrap and WRB

Since the 1960s, many builders have relied on plastic house wraps to achieve superior vapor permeability. But house wraps are applied after traditional sheathing is installed and approved by code officials. Then a crew has to return to wrap and tape the whole house.

In contrast, a product like new LP WeatherLogic Air & Water Barrier requires fewer steps. The sheathing and weather-protective layer are combined in a single panel that can be installed just like regular sheathing. The panel seams are then securely taped with an advanced acrylic tape that features one of today’s highest quality adhesives. And because the vapor-permeable overlay is permanently integrated into the panel, it won’t tear or blow away.

One of the best ways to get a tight building envelope is to use a structural panel like LP WeatherLogic barrier where the sheathing and vapor-permeable layer are tightly bonded during the manufacturing process. It's a breakthrough that involves fewer steps and less waiting than using house wrap.

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Business Advice4 min

Crushing the Top Rumors About Engineered Wood

LP Building Solutions uses engineered wood to create a portfolio of products that help professionals build smarter, better and faster. The innovations of engineered wood siding are relatively new. For instance, LP® SmartSide® Trim & Siding was introduced in 1997. Thanks to its advanced manufacturing process, it is one of the most durable siding solutions available. Sometimes people are skeptical of things that are really that good. So, let's crush a few myths with engineered wood facts.

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Business Advice4 min
Building Pier and Beam Foundation to Ease Maintenance and Repairability

Pier and beam design was among the most popular foundation techniques until the 1960s when concrete technology improved its floating slab system. Many builders use slab-on-grade construction-especially in warmer regions. We're going to find out why professionals Jordan Smith of @jordansmithbuilds and Kyle Stumpenhorst of @rrbuildings chose pier and beam over slab-on-grade for the All-in-LP Build in Bellville, Texas. But first, let's delve into pier and beam foundation.

Business Advice4 min
Embracing the Balance Between Resilient Design and Building Codes

From destructive hurricanes to fierce tornadoes, it seems news of catastrophic events is happening with alarming frequency. In fact, on March 3, 2020, an EF3 tornado tracked less than one mile from the LP Building Solutions headquarters in downtown Nashville, Tennessee, ripping through homes and businesses. While no traditional building can withstand the tremendous forces of disastrous weather events, it reminds us that embracing resilient construction and adopting stronger building codes could help protect our families, friends and neighbors.

News & Stories3 min
LP® SmartSide® Trim & Siding Installs 22 % Faster: Proven Durability in Today’s Changing Market

As a building industry professional, recent market changes have likely impacted the way your business operates. As you adjust to a new normal, seeking out building material companies with proven efficiency and reliability from third-party testing can significantly influence the success of your business.