Low- to mid-rise multifamily residential construction projects present a unique set of challenges based on sheer size alone. Consider the exterior of these structures. More materials are needed to frame and wrap the building, contractors need more hands on deck, and project timelines naturally run longer.
Builders are seeking alternative materials to complete structures on time (or quicker) and on budget (or even under budget) than they can with traditional construction methods and materials. Many of these construction pros are turning to solutions such as OX’s range of weatherization systems – particularly its 3-in-1 integrated structural sheathing – because they are high performance, cost competitive, and they integrate a number of exterior wall components into one.
In addition to the challenges posed by the scale of multifamily jobs, these projects often require a delicate balance between meeting stringent building codes, ensuring energy efficiency, and maintaining aesthetic appeal. Their complex nature demands innovative building solutions that can streamline the processes without compromising on quality or performance. OX Engineered Products' weatherization systems offer an answer to these demands, providing builders with comprehensive solutions that address structural, thermal, and moisture management needs in singular, easy-to-install products.
For large-scale multifamily structures, the benefits of incorporating these materials into the mix cannot be overstated.
Trimming Time
Once a structure is framed out, there are a number of components that must be installed on the exterior side of the studs to ensure long-term performance and durability. The first component needed is structural sheathing, which gives a multifamily building its rigidity and strength. Sheathing also serves as the surface for the application of exterior finishing materials, such as siding, brick, or stone. Next, builders must install weather-resistive barriers to keep air and moisture out.
These air and moisture barriers are crucial to a building’s long-term performance. The air barrier regulates indoor climate and is a key component in maintaining the internal temperatures of the structure. The water barrier keeps moisture from damaging the building’s structural materials, which are susceptible to mold and rot if not properly protected.
Layer by layer, floor by floor. For multifamily construction, it all keeps adding up, and time and cost are both on the line.
Installing these layers separately can extend the installation process, adding days onto a construction schedule. With integrated weatherization systems such as ThermoPLY®, construction crews only have to worry about installing one material to take care of the sheathing and exterior control layers. Choosing an integrated material that combines sheathing and weather-resistive barriers translates into measurable cost, labor, and time savings.

The Multifamily Fix
OX’s high-performance solution for multifamily structures, ThermoPLY, is a 3-in-1 product that includes the necessary elements that must come between the studs and cladding:
- Structural sheathing
- An air barrier
- A water-resistive barrier
The product allows multifamily builders to save time and money while meeting building code requirements for exterior walls. The bigger the structure, the more important it is for builders to consider products that are going to allow them to save money and move on to their next job more quickly.
In fact, the ThermoPLY system does what OSB and building wrap do combined, but far better and in a significantly lighter, more economical, and single-component solution. The material features high-strength cellulosic fiber boards with a protective polymer exterior layer and a water-resistive coating on both sides, delivering a lasting best-in-class air and moisture barrier. As an added benefit for multifamily building owners and developers, ThermoPLY comes with a 30-year limited warranty when installed with OX seam tapes.
As the demand for efficient, cost-effective, and sustainable building solutions grows, integrated materials such as ThermoPLY are providing real value in the construction industry. By combining structural strength, an integrated design, and ease of installation into a single product, these innovative solutions not only meet the challenges of low- to mid-rise multifamily residential projects but also pave the way for a more streamlined, sustainable future in construction.
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