Solutions – it’s what we cladding manufacturers strive for. We have a solution for thermal bridging. We have a solution for drainage. We have a solution for energy efficiency. And this solution also happens to be quite aesthetically pleasing. But at this point there’s more and we’ve discovered it – and it’s not EIFS.
StoEnergy Guard is an all-encompassing solutions-based package. Beginning with continuous waterproof air and vapor barriers, and then moving outward in to a drainage plane with a cavity for drying and sealing the deal with exterior insulation, the StoEnergy Guard system is designed to protect your building, regardless of your choice in cladding.
StoDrainscreen Installation
What does that mean? Simply put, claddings have different capabilities when it comes to protecting against moisture intrusion and energy loss. For that reason alone, you need a wall system to stand behind your cladding and protect it from the inside.
The advanced cavity wall system recognizes the need for an easy application procedure while addressing today’s stringent building codes and standards and of course offers the latest in energy-efficient wall technology which is why we’ve called it simple, safe & sound and sustainable.
Fast Cure – Allows work to proceed quickly without costly delays and interruptions to work schedule
Eliminates mesh, fabric and tapes at rough openings (when used with StoGuard) – Simplifies and speeds application
Cures in wet weather and on damp substrates – Avoids costly wet weather work shut downs or wash-offs; adheres to damp substrates without blistering or increase in drying time.
Installs down to near freezing temperatures (33°F [0.56°C]) – Extends construction period deeper into cold weather season.
Easy to install – Does not require highly skilled applicator work force reduces labor costs
Low VOC and South Coast AQMD Compliant – Compliant with all national, state and local VOC regulatory requirements; can be used throughout the US and Canada. Qualifies for LEED credits.
Continuing along in our conversation about air barriers brings us to another series of testing conducted to determine air leakage for air barrier assemblies – such as StoGuard. According to the Air Barrier Association of America (ABAA), “air barrier assemblies include the main air barrier components to join the materials together, to connect to a window or door assembly, to connect to a roof, to connect to a foundation and to penetrations.”
The true purpose of an air barrier assembly is to act as a continuous barrier to the movement of air through the wall. In testing, the StoGuard assembly has proven to meet the criteria proposed by the ASTM E 2357 standard of 0.2L/s·m2 (liters/sq meter).
In the testing, each specimen measures 8’x8’ and includes a several features found in a typical wall assembly. The ASTM E 2357 method measures both negative and positive pressure at constant rates. The specimen is then exposed to cycles of rapid loading followed by gust loading (both negative and positive). Air barrier assemblies must meet an allowable air leakage rate of 10 times more than an air barrier.
What we have seen in our discussions on air barriers is that they play a tremendous role in keeping your building dry while adding a significant energy efficient element.
Back in 2007, before launching a Windows-based version of Maps, Google spent time conducting real world testing to ensure that unique features like contact integration, GPS support and dragable maps all functioned, as the user should expect. In a blog entry released last week, Google announced that more than 100 million people are using the Maps application monthly. The periodic testing of new features allows Google to be confident in releasing quality, user-friendly applications.
Sto Corp. recently underwent its own real world testing. The first, mentioned in a previous entry, was a design challenge where 10 teams were faced with creating a building envelope mock-up panel according to ASTM E 783 (air leakage) and ASTM E 1105 (moisture leakage) standards.
The latest testing was based on requirements drawn up by the US Army Corp of Engineers for air tightness/leakage in new or retrofit construction of Army projects.
This testing was conducted by Neudorfer Engineers, Inc., and once again proves StoGuard is superior in terms of air and moisture protection for a building. For example, an acceptable score for the assembly, according to the USACE and ASTM requirements, is .25 cfm (cubic feet per minute)/sq.ft. Here StoGuard was proven to show a remarkable difference of 56% less air leakage. Detailed results are outlined in a recently published press release.
Successful project testing like this shows that not only does the product live up to the manufacturer’s claim, but also will give peace of mind to the owner knowing that the structure is protected.
In the last post, I discussed parts one and two of John Edgar’s building envelope video series, covering the air barrier and detailing respectively.
In part three, Mr. Edgar addresses the issue of water vapor within the enclosure. Here he explains how forces such as gas pressure and energy or heat affect water vapor transport. As a point of reference, the concept of relative humidity is discussed and we recall the key difference between dew point and the condensation plane. To best understand the effect of water vapor, we must learn how it moves through a wall section and how to calculate and model the transport of water.
How is relative humidity calculated?
The final part of the series provides an answer to all the above mentioned challenges within the building enclosure. Controlling moisture and preventing mold in wall construction are two bumps in the road many face along the building process journey. A solution provided by Sto is its fluid applied air/moisture barrier. This portion of the series helps us recognize the components and advantages of fluid applied air/moisture barriers vs. building wraps and other moisture barriers. Mr. Edgar ties it all together by outlining the different design considerations one must take when incorporating fluid applied air/moisture barriers into wall assemblies.
Overall, the “Little John Series” should not be utilized as a systematic guide to air/moisture barriers but serve as a set of guiding principles. Shifting gears, Sto recently announced a new set of guiding principles including innovations within the company and sustainability, which we will cover in the next post.
I mentioned in the last entry a four-part series designed by John Edgar to represent the importance of the building enclosure. Parts 1 – 3 serve as an overview while part 4 specifically addresses fluid applied air/moisture barriers and moisture control and mold prevention. Interestingly enough, Sto participated in the BEST2 Conference (Building Enclosure Science & Technology) just a few weeks ago.
Part 1 of the series covers the air barrier portion of the enclosure. Here Mr. Edgar compares fluid-applied air/moisture barriers with more traditional, paper and synthetic moisture barriers. While defining the components of an air barrier and demonstrating the differences between air and moisture barriers, emphasis is placed on the causes and effects of air leakage. Standards and building codes are also highlighted as well as the advantages of fluid applied air/moisture barriers.
The second part discusses detailing within the enclosure. Find out how to prevent bulk water entry and how to incorporate a fluid-applied air/moisture barrier into details. This portion also brings us back to last week where we discussed the 3-D approach (deflect – drain – dry) and how that concept can be integrated into the “leak triangle”, where the three components for bulk entry are defined.
