01/07/2002

Up-and-Coming

Cold applied roofing applications gain popularity

 

Being Cool

Cold applied bituminous roofing systems are a viable alternative to hot mopped asphalt or torch applied systems. Consider a cold application for:

• Buildings with difficult access such as high-rise buildings in downtown areas. A hot asphalt kettle is very difficult to manage in these situations and torches are not allowed in some cases.

• Roofing applications where building owners are sensitive to fumes, hot asphalt kettles, or open torches. Schools are now requiring that roofing be done year-round, even while students are in the classroom. Open torches, hot asphalt kettles, and fumes are not acceptable in this situation. Fumes are also of concern to hotels, hospitals, and food processing facilities.

• Cold weather applications. With specialized equipment and expertise, cold applied systems can be used year-round.
By Mike Cagle

Alternatives to using hot asphalt for built-up roofing systems and hot asphalt or a torch to apply modified bitumen roofing systems have been available for many years, but it is only in the last several years that we have begun to see a trend toward increased use of cold adhesives. This trend, in part, has been driven by the sensitivity of some individuals to hot asphalt fumes and additional safety measures required for torching.

It was not until the last few years that manufacturers developed adhesives that are effective with insulation, substrates, and membranes, qualifying cold applied systems for Factory Mutual approval. As a result, cold applied systems now represent a very viable alternative for multi-ply bituminous roofing systems.

These cold applied systems are particularly effective on roofing projects that have difficult access, such as high-rise buildings in downtown areas or in areas where odor can be of concern such as schools, hospitals, or hotels. Another advantage of these systems is that with specialized equipment they can be applied year-round and are particularly effective in cold weather.

The techniques used in the application of cold applied systems are significantly different than those using hot asphalt or a torch. As a result, additional training is required. Also, it is important for roofing contractors to be aware of the special precautions that must be taken in using industrial materials that contain solvents. To decrease cure time of the adhesives, either more volatile solvents must be used or the use of higher solids contents is incorporated into product formulations. The more volatile solvents may have adverse effects on the modified bitumen compound, whereas the higher solids formulations have a higher viscosity, which may make application more difficult. However, careful formulation of the higher solids adhesives can provide a reasonable compromise, producing adhesives with low solvent content that still give acceptable set-up times.

The industry also is innovating in other ways.  Reusable 350-gallon totes are now being used as a container for the adhesive. A line is run from the tote to the roof so that the adhesive can be applied by a spray or pump. Once the tote is empty, it can be returned and reused, minimizing the use of valuable landfill space and disposal of hazardous material.

The performance of a cold applied roofing system can be equal to those mopped in hot asphalt or torch applied. While both built-up roofing and modified bitumen systems can be applied with cold adhesives, the real growth in this application method is expected to come in modified bitumen systems that are less labor-intensive.

In the future, we believe that there will be an increased demand for cold applied bituminous roofing systems. By combining the advantages of cold adhesives with the advantages of multiple plies of roofing membrane, the industry can offer its customers a roofing system with proven long-term performance, without some of the disadvantages of mopped or torch applied systems.

Mike Cagle is market manager at Johns Manville Roofing Systems Group (www.jm.com), Denver.
 


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Tennant Company is a recognized leader in designing, manufacturing and marketing solutions that help create a cleaner, safer, healthier world. With thousands of satisfied customers already using award winning ec-H2O technology, why not see what you're missing? Test ec-H2O on your soils in your facility. Get a free demo.

 

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Visit our website today to learn about the design flexibility of a Morton building and the endless possibilities of partnering with our designBUILD team.


Wood construction is both cost and energy efficient. Check out Morton Buildings and our designBUILD team online today to discover all the benefits of post-frame construction.


When choosing a metal-clad building for your next construction project, consider Morton Buildings, Inc., and their designBUILD team, we’ll make your dream a reality.

We Can Help You Reduce Energy by 30%

Our mission is to help our customers manage their buildings' energy costs, improve reliability, and enhance performance while having a positive impact on the environment.
CLICK HERE to find out how.

 

Add highly responsive multi-zone comfort to any building project, in any climate. Our CITY MULTI H2i R2- and Y-Series VRF systems give you flexibility to fit the needs of any building. Enjoy 100% heating capacity at 0°F outdoor ambient, and 85% heating capacity at -13°F outdoor ambient.  For more information, log on to www.mitsubishipro.com


Tennant Company is a recognized leader in designing, manufacturing and marketing solutions that help create a cleaner, safer, healthier world. With thousands of satisfied customers already using award winning ec-H2O technology, why not see what you're missing? Test ec-H2O on your soils in your facility. Get a free demo.


Tennant Company is a recognized leader in designing, manufacturing and marketing solutions that help create a cleaner, safer, healthier world. With thousands of satisfied customers already using award winning ec-H2O technology, why not see what you're missing? Test ec-H2O on your soils in your facility. Get a free demo.

 

Replace core drilling with Connectrac In-Carpet and On-Floor Wireways, the proven connectivity solution in open interior spaces of all kinds. These elegant low-profile wireways are great for AV / telecom connectivity wherever it’s needed.

 


 
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