Provides adhesion properties that gain strength over time, compared to asphaltic and butyl tapes that lose adhesion over time.Offers superior long-term durability over asphaltic and butyl tape.Builders will find acrylic seam tape well worth the small extra expense over asphaltic and butyl tapes. Acrylic Construction Seaming TapeĪcrylic seam tape adapts to any surface and temperature and performs far better than either asphaltic and butyl tapes. However, compared to acrylic seam tape, butyl tape can lose adhesion and discolor over time due to its intolerance to cold temperatures and UV rays. Butyl tape performs better in extreme temperatures, and it retains flexibility and durability over time compared to asphaltic tapes. Today’s rubber tape, called butyl tape, uses a synthetic (elastomer) rubber. The first rubber tape used natural rubber components. The original design of the rubber (butyl) construction seaming tape aimed to improve on asphaltic tape. While the price of asphaltic tape may appeal to builders, it may not be the best choice for a construction tape for vapor barrier seams. Furthermore, asphaltic tape gives off harmful volatile organic compounds (VOCs).Asphaltic tapes also lose adhesion properties in both extremely high and low temperatures, become brittle in cold weather, and lose durability when exposed to UV rays.Notably, asphaltic tape’s adhesion properties may not be consistent, depending on the surface being sealed.However, its many problems should discourage builders from using it. The low cost of asphaltic tape makes it one of the most widely used tapes in the building industry. A Comparison of Asphaltic, Rubber, and Acrylic Construction Seam Tapes Asphaltic Construction Seaming Tape However, for the protection of the building envelope, the tape must provide long-term adhesion, ease of application, low-permeability, resistance to air, moisture, and UV rays, and durability. The cost of seaming tapeĬontractors must also consider the cost of the different types and brands of tape, which can vary tremendously. Look for a durable seam tape with enough tensile strength to maintain its form and stay flat against the vapor barrier over the lifetime of the building project. Good construction tape provides UV resistance. Durabilityīuilders should select tape with excellent air- and moisture-resistance. In addition, a flexible tape hastens applications because it allows contractors to seal quickly around any penetrations or tight corners. Tapes with marked edges make it easier to tear and quicker to apply, saving workers time and frustration. In hot, cold, and wet environments, the tape should maintain adhesion over time. When comparing construction seam tapes, contractors should consider the following factors: 1. Today’s contractors can choose between three types of tape: asphaltic, rubber (butyl), and acrylic. However, selecting the right tape makes a significant difference in energy efficiency, durability, and indoor air quality (IAQ). With so many seam tapes on the market, choosing the best one can overwhelm builders. How to Choose the Best Construction Tape for Vapor Barrier Seams CI and a properly sealed vapor barrier provide crucial components of an energy-efficient, durable, and healthy building. Sealing the seams of the barrier with a high-performing tape helps to ensure a continuous air barrier that reduces moisture intrusion and accumulation into the wall system. One method of achieving a tight building envelope involves continuous insulation (CI) across every structural member of the building, along with an application of an efficient vapor barrier sealed with a high-quality construction seaming tape. To achieve these goals, contractors must aim to select methods and materials that produce tight building envelopes that will stop air and moisture infiltration. Over the past 40 years, a growing awareness of the importance of sustainability, reducing energy use, and creating healthy indoor spaces has prompted many changes in the building industry.
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