Battling Condensation: Determining the Best Method for Control

As suppliers and installers of metal roofing, we have all likely dealt with the issue of condensation. There are several control methods available, so the first consideration must be towards looking at the building construction to then determine the best method of controlling condensation. It’s crucial to have conversations with customers and end users about condensation. The condensation control measures can, and most likely will, affect cost, so owners must be in the loop and fully educated as to their options. It’s always best to educate the customer so they can make an informed decision about the next course of action.

This education starts with understanding the source of the issue. Condensation is caused when warm moist air inside a structure comes in contact with the cooler under side of the metal. The metal does not “sweat” — moisture must be introduced from another source, such as cooking or showering in residential projects. In post-frame structures, moisture stems from outdoor humidity, ground moisture or animals.

When working with metal, three weapons are traditionally deployed in the battle against condensation: ventilation, insulation and vapor barriers. Venting removes the warmer moist air from the structure but requires open air flow from eave to ridge for this method to work properly. Insulation is used to keep attic space as close to the outside air temperature as possible but is only applicable to heated and cooled structures with an attic, such as a home. Vapor barriers prevent moist air from getting to the back of the metal panels but again are typically used only on projects with a solid deck such as a home.

This of course begs the question of what to do with open framed structures that typically have no attic space to vent or a solid deck to apply a vapor barrier. In this case, insulation blankets can be used between the purlins and the metal roof panels, but there are other alternatives to this available in the market. Condensation control products can be applied to the back of the metal panels during the fabrication process. It is always best to check with the panel manufacturer and inquire about what type of products they offer to help you effectively wage your battle against condensation.

For more information on condensation options email questions at:

This article was published in Construction Magazine

Gauging the Future: Metal Brings Unlimited Options to Retail Branding


Corporate and retail brand image matters.  Whether you are in Washington DC, Beijing or Sao Paulo, when you see the Golden Arches or the Coca-Cola® logo you simply know what they mean and who the company is that is standing behind them.  The consistency of corporate and retail building image matters, as well.  The corporate and retail building image must create brand awareness; the building image must be inviting and welcoming; the building image must provide consistent economics from location to location; and, the building image must be repeatable whether in Washington DC, Beijing or Sao Paulo.

Those corporate and building “musts” can be achieved with metal enclosure systems, whether those systems are derived from coated steel, aluminum or copper.  The metals used in metal cladding, enclosure systems and components are easily fabricated into elegant or complex design elements that can be replicated from site to site.  Further, these metals can be finished with high-quality, durable and long-lasting paint coating systems and images to match the corporate or retail brand image demands.  Metal cladding can also provide green building benefits to the owner through production waste management, energy consumption improvement, and material recycled content and recycling.  Metal can easily provide the architectural and functional brand image that corporate and retail building owners are looking to achieve and market.

Ace-Hardware w Fabral Metal Roof and WallsGive metal a chance on your next building brand image development effort.  We stand ready to assist with material specifications, details, design and quality service.


Kit Emert

VP and General Manager, Euramax Commercial